Calculated Industries Machinist Calc Pro Manual
Calculated Industries
kalkulator
Machinist Calc Pro
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U 'ser s GUide — 1
M CACHINIST ALC™ PRO
The Advanced Machining Math and Machinist Calc™ Pro
Reference Tool (Model 4087) provides fast, precise solutions for
your every day machining calculations. With the Machinist Calc Pro
you will spend less time looking up your most-needed calculations
on charts, in books or on the Internet and more time machining.
The Machinist Calc Pro gives you hundreds of machining-specic
calculations, including:
• Cutting Speed, Spindle Speed (RPM)
• Feed Rate, Cutting Feed, Feed per Tooth (Chip Load)
• Built-in Drill and Thread Size reference tables
• Drill Point Cut Depth solutions
• Wire Sizes and 3-Wire Measurements
• Bolt Pattern hole layouts with center x, y coordinate
• Right triangle math
• Trigonometric solutions
• Work in and convert between U.S. and Metric units, including:
• Decimal Inches/Mils
• Feet-Inch-Fractions
• m, mm, cm
• Area, Volume and Weight
2 — Machinist c Palc™ ro
TAbLe Of CONTeNTS
GeTTING STARTeD.............................................................................................5
KEY DEFINITIONS ............................................................................................5
Basic Function Keys ........................................................................................5
Dimensional Function Keys ............................................................................6
Weight and Volume Function Keys .................................................................7
Trigonometric Function Keys .........................................................................7
Miscellaneous Functions .................................................................................8
Machinist Function Keys .................................................................................9
SETTING FRACTIONAL RESOLUTIONS ..................................................... 13
Permanently Set Fractional Resolution ........................................................13
Temporarily Set Fractional Resolution .......................................................... 14
PREFERENCE SETTINGS .............................................................................15
ENTERING DIMENSIONS ..............................................................................16
Linear Dimensions ........................................................................................16
Square and Cubic Dimensions ..................................................................... 17
CONVERSIONS .............................................................................................. 17
Linear Conversions ....................................................................................... 17
Square and Cubic Conversions .................................................................... 19
Weight Conversions ......................................................................................19
Weight per Volume and Volume Conversions ..............................................20
BASIC MATH OPERATIONS ..........................................................................20
Adding and Subtracting Dimensions ............................................................20
Multiplying Dimensions .................................................................................21
Dividing Dimensions......................................................................................21
Calculating Percentages ...............................................................................21
MEMORY OPERATION ..................................................................................22
Using M+ .......................................................................................................22
Using Memory Storage Keys (M1 – M9) ......................................................23
PAPERLESS TAPE OPERATION ...................................................................24
USING THe MACHINIST CALC PRO ...............................................................25
RPM (SPINDLE SPEED) .................................................................................26
U 'ser s GUide — 3
Milling ................................................................................................26
Turning ..............................................................................................27
Drilling ...............................................................................................27
.....................................................................................................28
Based on Cutting Feed and RPM (for Turning) .......................28
Based on Cutting Feed and RPM (for Drilling) ........................28
Based on Feed per Tooth, RPM and # of Teeth ......................29
............................................................................................
Milling .................................................................................
Turning ...............................................................................
Drilling ................................................................................
Using Metric Mode .............................................................
...................................................................
Based on Cutting Feed and # of Teeth ...........................
Based on Feed Rate, RPM and # of Teeth ......................
...............................................................................
Based on Feed per Tooth, Tool Diameter and Cut Depth ...........................
..............................................................................................
Based on Feed per Tooth and # of Teeth ............................
Based on Feed Rate and RPM ...........................................
....................................................................................................
................................................................................
....................................................................................
.......................................................................................
..............................................................................
...................................................................................................40
.............................................................................................40
Internal Thread .............................................................................................. 41
.............................................................................................42
....................................................................................42
............................................................................42
........................................................
4 — Machinist c Palc™ ro
.....................................................
....................................................................................44
..................................................................................46
........................................................................................47
..........................................................................48
.............................................49
W .......................................................................................................49
Known Thread Size and Wire Size ........................50
Known 3-Wire Measurement and Wire Size .................... 51
..............................................................................................52
....................................................................................................52
....................................................................54
Based on Adjacent and Opposite Legs .............................54
Based on Hypotenuse and Angle ......................................55
...............................................................................55
Based on Diameter ...........................................55
Based on Radius ...............................................56
......................................56
.........................................................56
....................................................................56
................................................................................57
APPeNDIX A – DEFAULT SETTINGS ..............................................................58
APPeNDIX b – prEFErENcE SETTINGS .................................................. 59
APPeNDIX C – cArE INSTrUcTIONS ........................................................ 62
APPeNDIX D – AccUrAcy/ErrOrS, AUTO ShUT-OFF,
bATTErIES, rESET ...................................................................................... 62
................................................................................ 62
........................................................................................
.................................................................................................
............................................................
.........................................................................................................
RePAIR AND ReTURN .................................................................................. 64
WARRANTy ................................................................................................... 65
U 'ser s GUide — 5
GETTING STARTED
You may want to practice getting a feel for your calculator keys by
reading through the key denitions and learning how to enter data,
how to store values, etc., before proceeding to the examples.
KEY DEFINITIONS
Basic Function Keys
O
On/Clear Key — Turns on power. Pressing once clears
the last entry and the display. Pressing twice clears all
non-permanent values.
o
Off — Turns all power off. Clears all non-permanent
values.
+ - *�
, =
Arithmetic operation keys.
0-9
and.
Keys used for entering numbers.
g
Convert — Used with the dimensional keys to convert
between units or with other keys to access special
functions.
S
Store — Used for storing values.
S�
1-9
Storage Registers M1 through M9 — Used to store
values in Memory registers 1 through 9.
r
Recall — Used with other keys to recall stored values
and settings.
g r
Memory Clear (M-R/C) — Clears Accumulative Memory
without changing current display.
r r
Memory Clear — Clears Accumulative Memory and
displays total.
M
Accumulative Memory — Adds displayed value to
Accumulative Memory.
(cont’d)
6 — Machinist c Palc™ ro
g M
M- — Subtracts displayed value from Accumulative
Memory.
Dimensional function Keys
mMillimeters — Identies entry as millimeters, with
repeated presses toggling between linear, area and
volume units. Converts dimensional value to units of
millimeters, with repeated presses toggling between
millimeters and meters.
g 5 Centimeters (cm) — Identies entry as
centimeters, with repeated presses toggling
between linear, area and volume units.
g 9 Meters (m) — Identies entry as meters, with
repeated presses toggling between linear, area and
volume units.
g 7 Feet —Identies entry as Feet, with repeated
presses of
g 7 toggling between linear, area and
volume units. Also used with i and / for entering
Feet-Inch values. Repeated presses of g 7 during
conversions toggle between fractional Feet-Inch and
decimal Feet.
iInch — Identies entry as Inches, with repeated
presses toggling between linear, area and volume
units. Entry can be whole or decimal numbers. Also
used with
/ for entering fractional Inch values (e.g.,
9 i 1 / 2). Repeated presses during conversions
toggle between fractional and decimal Inches.
/Fraction Bar — Used to enter fractions. Fractions
can be entered as proper (1/2, 1/8, 1/16) or
improper (3/2, 9/8). If the denominator (bottom) is
not entered, the calculator’s fractional accuracy
setting is automatically used. Results are always
shown in typical dimensional fractional format.
(cont’d)
U 'ser s GUide — 7
B1/1000" (mils) — Multiplies a dimensionless entry
by 0.001 Inch and displays the result as Inches.
Converts a linear entry to decimal Inches. For both
methods, the result is rounded and displayed to
three decimal places
Weight and Volume function Keys
g6 Tons — Enters or converts a weight or volume
value to tons.
g4 Pounds (lbs) — Enters or converts a weight or
volume value to pounds.
g3 Metric Tons (met tons) — Enters or converts a
weight or volume value to metric tons.
g2 Grams — Enters or converts a weight or volume
value to grams.
g1 Kilograms (kg) — Enters or converts a weight or
volume value to kilograms.
g0 Weight per Volume (wt/vol) — Stores a new
weight per volume as pounds per cubic foot or
other format as shown below. Default value is 490
pounds per cubic foot of steel.
● Pounds per cubic foot
● Pounds per cubic inch
● Metric tons per cubic meter
● Kilograms per cubic meter
Trigonometric Function Keys
g# Sine — Calculates the Sine of an entered degree
or unitless value.
ga Arcsine (ArcSine) — Calculates the angle for the
entered or calculated Sine value.
gF Cosine (Cos) — Calculates the Cosine of an
entered degree or unitless value.
(cont’d)
8 — Machinist c Palc™ ro
gp Arccosine (ArcCos) — Calculates the angle for
the entered or calculated Cosine value.
gc Tangent (Tan) — Calculates the Tangent of an
entered degree or unitless value.
gh Arctangent (ArcTan) — Calculates the angle for
the entered or calculated Tangent value.
Miscellaneous functions
g.
Degrees:Minutes:Seconds (dms◄►deg)
—
Converts between D:M:S and decimal degree
formats; repeated presses will toggle between the
two formats.
%Percentage — Used to nd a given percent of a
number.
g% x2 — Squares the value on the display.
ABackspace Function — Used to delete entries
one keystroke at a time (unlike the O
function,
which deletes the entire entry).
gA Square Root (!) — Calculates the Square Root
of the number on the display.
g, Reciprocal (1/x) — Finds the Reciprocal of a
number (e.g., 8g, =
0.125).
g* Clear All — Returns all stored values to the default
settings. Does not affect Preference Settings.
g- Change Sign (+/–) — Toggle displayed value
between negative and positive value.
g+ Pi — Displays value of (3.1415927). π
(cont’d)
U 'ser s GUide — 9
g= Paperless Tape (Tape) — Accesses the
Paperless Tape mode (see Paperless Tape
section), which keeps track of your past 30 entries.
Useful for checking strings of numbers.
gS Preference Settings (Prefs) — Accesses various
customizable settings, such as dimensional answer
formats (see section).Preference Settings
Machinist function Keys
CCutting Speed — Enters or calculates Cutting
Speed. Unitless entries assumed feet per minute
in U.S. mode; meters per minute in Metric mode.
Calculates Cutting Speed given entered Diameter
and RPM (Spindle Speed). Result is displayed as a
whole number.
gC Radial Chip Thinning (RCT) — Enters a Cut
Depth and calculates a Radial Chip Thinning
factor to increase the Feed Rate given Feed Per
Tooth, Tool Diameter and a Cut Depth that is less
than one-half the Tool Diameter. Unitless entries
assumed Inches in U.S. mode; millimeters in
Metric mode.
RRevolutions per Minute — Enters or calculates
RPM (Spindle Speed). Calculates RPM given
entered Diameter and Cutting Speed. Result is
displayed as a whole number.
gR 3-Wire Measurement (3-W Measure) — Enters
or calculates a Three-Wire Measurement. Unitless
entries assumed Inches in U.S. mode; millimeters
in Metric mode. Calculates the minimum and
maximum Three-Wire Measurements and Pitch
Diameters given entered Thread Size and Wire
Size, assuming an External thread type. If a
Three-Wire Measurement value is entered, the
Pitch Diameter calculation is based on this entered
measurement. (cont’d)
10 — Machinist calc™ Pro
(cont’d)
fFeed Rate — Enters or calculates Feed Rate.
Unitless entries assumed inches per minute in
U.S. mode; millimeters per minute in Metric mode.
Calculates Feed Rate given values for Cutting
Feed and RPM (Spindle Speed) or Feed per Tooth
(Chip Load), RPM and Number of Teeth.
gf Wire Size — Enters or calculates Wire Size for
3-Wire Measurements. Unitless entries assumed
Inches in U.S. mode; millimeters in Metric mode.
Calculates the recommended Ideal, Maximum
and Minimum Wire Sizes given an entered Thread
Size.
bBolt Pattern — Enters the number of holes in a
Bolt Pattern. Calculates the hole Center-to-Center
Spacing and the x and y coordinates for each hole
in a Bolt Pattern given entered Diameter, Number
of Bolt Holes, Starting Angle (optional) and Center
x and y coordinates (optional).
gb Thread Classication (Thread Class) — Used
to select the Thread Class for numeric and
fractional Threads and the Tolerance Class for
metric Threads. The default Class for numeric and
fractional Thread Sizes is 2B (Internal) and the
default Tolerance Class for metric Thread Sizes
is 6H (Internal). See Thread Sizing section for
further details on available Classes.
tThread Size — Enters a numeric, fractional
or metric Thread Size and provides Thread
characteristics such as Cut Tap Drill Size,
Minimum Major Diameter, etc. See Thread
Sizing section for further details on entry format,
valid entries and a listing of the resulting Thread
characteristics.
U 'ser s GUide — 11
gt % Thread — Enters a non-standard Thread Grip
Percentage for use in determining screw Tap Drill
Sizes. Default value is 75%.
DDrill Size — Enters a numeric, letter, fractional
or metric Drill Size, displaying the decimal Inch
(U.S. mode) or millimeter (Metric mode) equivalent
of the Drill Size. The next smaller Drill Size is
displayed if the entered value doesn’t match a Drill
Size. Repeated presses of
D or + toggle through
Drill Sizes in increasing order. Presses of - toggle
through Drill Sizes in decreasing order. Selected Drill
Size is stored upon exiting function.
gD Drill Point — Enters the Cutting Angle of a Drill
Point. Calculates the Drill Point Cut Depth that
needs to be taken into account when it’s necessary
to maintain a specic full diameter depth.
#Number of Teeth — Enters the Number of Teeth
on a tool. Default value is 1.
FFeed per Tooth — Enters or calculates Feed
per Tooth (Chip Load). Unitless entries assumed
Inches in U.S. mode; millimeters in Metric mode.
Calculates Feed per Tooth given entered Cutting
Feed and Number of Teeth or RPM (Spindle
Speed), Feed Rate and Number of Teeth.
cCutting Feed — Enters or calculates Cutting
Feed. Unitless entries assumed inches per
revolution in U.S. mode; millimeters per revolution
in Metric mode. Calculates Cutting Feed given
entered Feed per Tooth (Chip Load) and Number
of Teeth or Feed Rate and RPM (Spindle Speed).
(cont’d)
12 — Machinist calc™ Pro
dDiameter — Enters a Diameter. Unitless entries
assumed Inches in U.S. mode; millimeters
in Metric mode. Calculates circle Area and
Circumference given entered Diameter. Calculates
Diameter given entered Radius.
gd Radius — Enters or calculates a Radius. Unitless
entries assumed Inches in U.S. mode; millimeters
in Metric mode. Calculates Radius given entered
Diameter.
g8 Alpha — Enters alphabet character selection
mode. While in this mode, a letter can be selected
and used with D
to enter a letter Drill Size.
Entering this mode with a unitless entry between 1
and 26 will display the corresponding letter of the
alphabet (i.e.
5g8
displays the letter ). While e
in Alpha mode, presses of 8 or
+
toggle forward
through the alphabet, while presses of - toggle
backward.
aAdjacent (x) — Enters or calculates the Adjacent
(horizontal) leg of a right triangle. Calculates
Adjacent value given two other right-triangle
values. Also enters the Center x-coordinate of a
Bolt Pattern.
pOpposite (y) — Enters or calculates the Opposite
(vertical) leg or height of a right triangle. Calculates
Opposite value given two other right-triangle values.
Also enters the Center y-coordinate of a Bolt Pattern.
hHypotenuse (r) — Enters or calculates the
Hypotenuse (diagonal) of a right triangle.
Calculates Hypotenuse value given two other right-
triangle values.
(cont’d)
U 'ser s GUide — 13
nAngle (θ) — Enters or calculates an Angle,
providing the Adjacent Angle for both instances.
Calculates an Angle given two other right-
triangle values. Also enters the Starting Angle
of the rst hole of a Bolt Pattern, with 0° being
the three o’clock position and the rotation going
counterclockwise.
SETTINg FracTIONal rESOluTIONS
The is set to display fractional answers in Machinist Calc Pro
64ths of an Inch. All examples in this User’s Guide are based
on 1/64". However, you may select Fractional Resolution to
be displayed in other formats (e.g., 1/16", 1/32", etc.). The
methods for permanently and temporarily changing Fractional
Resolution are shown in the following sections.
Permanently Set Fractional Resolution
To permanently set the Fractional Resolution, you must be in
Preference Setting mode.
KEYSTROKE DISPLAY
1. Access Preference Settings:
gS (Prefs) FRAC 0-1/64 *INCH
2. Toggle through available Fractional Resolutions:
+FRAC 0-1/2 INCH
+FRAC 0-1/4 INCH
+FRAC 0-1/8 INCH
+FRAC 0-1/16 INCH
+FRAC 0-1/32 INCH
+ (repeats options) FRAC 0-1/64 INCH
(cont’d)
14 — Machinist calc™ Pro
3. To permanently set the Fractional Resolution you have
selected above, press O (or any key) to set the displayed
Fractional Resolution and exit Preference Settings.
KEYSTROKE DISPLAY
O0.
4. To recall your selected Fractional Resolution:
r/ STD 0-1/64 INCH
* 1/64" is the default setting. The display may differ from the example
depending on what the resolution is currently set to.
Temporarily Set Fractional Resolution
You can also convert a fractional value to a different resolution
temporarily while solving a problem. In the example below, add
1/64th to 44/64th of an Inch and then convert the answer to
other Fractional Resolutions:
KEYSTROKE DISPLAY
OO 0.
44/64
0-44/64 INCH
+1/64=
0-45/64 INCH
g1 (1/16)
0-11/16 INCH
g2 (1/2)
0-1/2 INCH
g3 (1/32)
0-23/32 INCH
g4 (1/4)
0-3/4 INCH
g6 (1/64)
0-45/64 INCH
g8 (1/8)
0-3/4 INCH
OO * 0.
* Changing the Fractional Resolution on a displayed value does not
alter your Permanent Fractional Resolution Setting (set in Preference
Settings).
Note: This setting is temporary; it will revert back to your Permanent
Fractional Setting upon press of
O
or when you turn the calculator off.
(cont’d)
U 'ser s GUide — 15
PrEFErENcE SETTINgS
Press g, then S to access the Preferences menu. Continue
pressing S to toggle through different Preferences. Press
+ or - keys to toggle between options of the different
Preferences. Press O to exit Preferences. Your calculator
will keep your Preference Settings until a Full Reset alters
your settings to the default values (see for more Appendix
information).
KeySTROKe DISPLAy
gSS (Prefs)
(Functional Result Rounding)
f-RND 0.0000
+f-RND 0.000
+f-RND fLOAT
+(repeats options) f-RND 0.0000
Third press of S:
(Default Unit Format) US UnITS
+MeTRC UnITS
+(repeats options) US UnITS
Fourth press of S:
(Area Answer Format) AReA Std.
+AReA 0. SQ feeT
+AReA 0. SQ INCH
+AReA 0. SQ M
+(repeats options) AReA Std.
Fifth press of S:
(Volume Answer Format) VOL Std.
+VOL 0. CU feeT
+VOL 0. CU M
+VOL 0. CU INCH
+(repeats options) VOL Std.
Sixth press of S: (Fractional Mode) fRAC Std.
(cont’d)
16 — Machinist calc™ Pro
+FRAC COnST
+(repeats options) FRAC Std.
Seventh press of S:
(Mathematical Operation) MATH OrDEr
+MATH CHAIn
+(repeats options) MATH OrDEr
ENTErINg DImENSIONS
Note: Unlike other Calculated Industries/Construction Master
calculators, the does not have a dedicated Feet key. Machinist Calc Pro
Feet is a secondary function located above the
7
key, so you have to
use the
g
key, then
7
to enter or calculate dimensions using Feet.
Below are some examples.
Enter 2 Feet, then label as square and cubic units:
DIMENSIONS KEYSTROKE DISPLAY
2 Feet 2g7 2 FEET
2 square Feet g7 2 SQ FEET
2 cubic Feet g7 2 CU FEET
Enter 2 Feet, 3 Inches:
KEYSTROKE DISPLAY
2g73i 2 3 FEET INCH
Linear Dimensions
Examples of how linear dimensions are entered (press O
after each entry):
DIMENSIONS KEYSTROKE
23 mils 23B
4.5 Inches 4.5i
95 millimeters 95m
1,320 Feet 1320g7
201 meters 201g9
KEYSTROKE DISPLAY
(cont’d)
U 'ser s GUide — 17
Square and Cubic Dimensions
Examples of how square and cubic dimensions are entered
(press O after each entry):
DIMENSIONS KEYSTROKE
14 square Inches 14ii
11 square millimeters 11mm
1.5 cubic meters 1.5g999
3 cubic Feet 3g7g7g7
cONvErSIONS
Linear Conversions
Convert 10 Feet 6 Inches to other dimensions, including
metric:
KEYSTROKE DISPLAY
OO 0.
10g76i
10 6 FEET INCH
g
B* 126.000 INCH
g7
(Feet) 10.5 FEET
g
i
126. INCH
gm 3200.4 MM
g5 (cm) 320.04 CM
g9 (m) 3.2004 M
*Converting a linear value using the
B
key will result in the decimal
Inch equivalent of the value, rounded to three decimal places. Only
unitless values are multiplied by 0.001 Inch when using this key.
Convert 15 Feet 9-1/2 Inches to decimal Feet. Then convert
back to Feet-Inch-Fractions.
KEYSTROKE DISPLAY
OO 0.
(cont’d)
18 — Machinist calc™ Pro
15g79i1/2 15 9-1/2 feeT INCH
g7 (Feet) 15.791667 feeT
g7 15 9-1/2 feeT INCH
Convert 17.32 Feet to Feet-Inch-Fractions:
KeySTROKe DISPLAy
OO 0.
17.32g7 (Feet)
17.32 feeT
=g7 17 3-27/32 feeT INCH
g7 17.32 feeT
g
i
207.84 INCH
g7g7 17 3-27/32feeT INCH
Convert 8-1/8 Inches to decimal Inches. Then convert to
decimal Feet.
KeySTROKe DISPLAy
OO 0.
8i1/8
8-1/8 INCH
g
i
8.125 INCH
g7 (Feet) 0.6770833 feeT
Convert 9.0625 Inches to fractional Inches. Then convert to
decimal Feet.
KeySTROKe DISPLAy
OO 0.
9.0625i
9.0625 INCH
g7 (Feet) 0.7552083 feeT
(cont’d)
KeySTROKe DISPLAy
U 'ser s GUide — 19
Square and Cubic Conversions
Convert 6 square Feet to other square dimensions:
KEYSTROKE DISPLAY
OO 0.
6g7g7 (Feet) 6 SQ FEET
gm 557418.24 SQ MM
g9 (m) 0.5574182 SQ M
g5 (cm) 5574.1824 SQ CM
Convert 0.05 cubic meters to other dimensions:
KEYSTROKE DISPLAY
OO 0.
.05g999 CU M(m) 0.05
gm 50000000. CU MM
g5 (cm) 50000. CU CM
gi 3051.1872 CU INCH
g7 (Feet) 1.7657333 CU FEET
Weight Conversions
Convert 1.5 tons to pounds and kilograms:
KEYSTROKE DISPLAY
OO 0.
1.5g6 (tons) 1.5 TON
g1 (kg) 1360.7771 KG
g4 (lbs) 3000. LBS
20 — Machinist calc™ Pro
Weight per Volume and Volume Conversions
Convert 2 cubic Feet of stainless steel to pounds, tons,
kilograms, and metric tons if the steel weighs 7,480 kilograms
per cubic meter.
KEYSTROKE DISPLAY
OO 0.
1. Store the weight per volume:
7480S0000
*
(wt/vol)
$
7480. KG/ CU M
2. Enter steel volume:
2g7g7g7 2 CU FEET
3. Convert to pounds, tons, kilograms and metric tons:
g4 (lbs) 933.92229 LBS
g6 (tons) 0.4669611 TON
g1 (kg) 423.62003 KG
g3 (met tons) 0.42362 MTON
4. Change the weight per volume back to the default value:
490S00 (wt/vol)
$
490. LBS/ CU FEET
* The number of
0
presses may vary, depending on the last units
displayed when wt/vol was last recalled/stored. By default, pounds per
cubic foot is displayed rst.
BaSIc maTH OPEraTIONS
Adding and Subtracting Dimensions
Add the following measurements:
• 6 Feet 2-1/2 Inches
• 11 Feet 5-1/4 Inches
• 18.25 Inches
Then subtract 2-1/8 Inches.
U 'ser s GUide — 21
KEYSTROKE DISPLAY
6 g 7 2 i 1 / 2 + 6 2-1/2 FEET INCH
1 1 g 7 5 i 1 / 4 + 17 7-3/4 FEET INCH
1 8 . 2 5 i = 19 2 FEET INCH
- 2 i 1 / 8 = 18 11-7/8 FEET INCH
Multiplying Dimensions
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2 Inches:
KEYSTROKE DISPLAY
5 g 7 3 i *
5 3 FEET INCH
1 1 g 7 6 i 1 / 2 = 60.59375 SQ FEET
Multiply 2 Feet 7 Inches by 10:
KEYSTROKE DISPLAY
2 g 7 7 i * 1 0 = 25 10 FEET INCH
Dividing Dimensions
Divide 30 Feet 4 Inches by 7 Inches:
KEYSTROKE DISPLAY
3 0 g 7 4 i , 7 i = 52.
Divide 20 Feet 3 Inches by 9:
KEYSTROKE DISPLAY
2 0 g 7 3 i , 9 = 2 3 FEET INCH
Calculating Percentages
The
%
key can be used for nding a given percent of a
number or for working add-on, discount or division percentage
calculations. It can be used with any type of number, in
any dimension (Feet, Inch, millimeter, etc.) and any type of
convention (non-dimensioned, linear, square or cubic).
(cont’d)
22 — Machinist calc™ Pro
Find 18% of 50 Feet:
KeySTROKe DISPLAy
O O 0.
5 0 g 7 * 1 8 %
9. feeT
Take 20% from 17 Feet 6 Inches:
KeySTROKe DISPLAy
1 7 g 7 6 i - 2 0 % 14 0 feeT INCH
mEmOrY OPEraTION
Whenever the M key is pressed, the displayed value will be
added to the Memory. Other Memory functions:
fUNCTION KeySTROKe
Add to Memory M
Subtract from Memory g M
Recall total in Memory r M
Display/Clear Memory r r
Clear Memory g r
Memory is semi-permanent, clearing only when you do one of
the following:
– turn off the calculator
– press rr
– press gr
– press g* (Clear All).
When Memory is recalled (
r M
), consecutive presses of
M
will display the calculated Average and total Count of the
accumulated values.
Using M+
KeySTROKe DISPLAy
3 5 5 M
M+ 355. &
2 5 5 M
M+ 255. &
(cont’d)
U 'ser s GUide — 23
7 4 5 g M (M-)
M- 745. &
r M
TOTAL - 135. &
M
AVG - 45. &
M
COUNT 3. &
r r
M+ - 135.
Using Memory Storage Keys (M1- M9)
In addition to the standard cumulative Memory (as previously
described), your calculator has nine independent Storage
Registers – M1 through M9 – that can be used to permanently
store single, noncumulative values. The following example
shows the use of M1 (S 1). To use M2 - M9, replace the
presses of the 1 key with presses of the corresponding
number key (2-9).
You can replace a value in one of these Memory registers by
storing a new value in place of the stored value.
FUNCTION KEYSTROKE
Store single value in M1 S 1
Clear M1 0 S 1
Recall M1 r 1
Store 175 into M1, recall the value, and then clear the value:
KEYSTROKE DISPLAY
1 7 5 S 1 MEM-1
$
175.
o O 0.
r 1 MEM-1
$
175.
0 S 1 MEM-1
$
0.
KEYSTROKE DISPLAY
24 — Machinist calc™ Pro
PaPErlESS TaPE OPEraTION
The Paperless Tape allows you to display and review the last
thirty entries of a regular math or basic dimensional math
sequence.
To access this mode after entering values, press g =. Then,
press + or - to scroll forward or backward through the
entries.
While in the Paperless Tape mode, the display will show
the previously entered or calculated value, along with the
sequential number of the entry (e.g., 01, 02, 03, etc.) and the
math operator (+, –, x, ÷, %) in the upper left corner of the
display.
Note: If
=
has been used in the middle of a sequence, SUB (for
Subtotal) will display in the upper left. If
=
was the last operation
performed, the display will show TTL (Total) as the last entry.
To exit this mode, press = to exit and maintain the last entry
on the display. When exiting, the last entry (or TTL) will be
displayed, allowing you to continue using the last tape value
for another operation, if desired.
Note: The Paperless Tape is cleared when you do one of the following:
-
O
is pressed twice
- upon a new calculation (new equation string is started)
- when the calculator is shut off.
Add a sequence of values and access Paperless Tape mode
to review your entries. Then, add another value to your total.
KeySTROKe DISPLAy
1. Add a sequence of values:
O O
0.
4 i +
4. INCH
U 'ser s GUide — 25
7 i 1 / 2 +
11.5 INCH
6 i + 17.5 INCH
3 i 3 / 4 = 21.25 INCH
2. Access the Tape function:
g = TTL = 21.25 INCH
3. Scroll from rst value to total:
+01 4. INCH
+02+ 7-1/2 INCH
+03+ 6. INCH
+04+ 3-3/4 INCH
+TTL = 21.25 INCH
4. Scroll last two values:
-04+ 3-3/4 INCH
-03+ 6. INCH
5. Exit Tape function and add another value to your total:
=TTL = 21.25 INCH
+21.25 INCH
3 i 1 / 2 = 24.75 INCH
USING THe MAchINIST cALc prO
IMpOrTANT: All examples are based on the default U.S. units
mode, displaying entries and calculations in U.S. units. Also note
that if an attempt is made to nd a solution (using the Machinist
functions) without having stored the minimum required values, the
calculation will not be performed. Instead, the currently stored value
for the selected function will be displayed. See Key Denitions
section for function requirements
.
KeySTROKe DISPLAy
26 — Machinist calc™ Pro
rPm (SPINDlE SPEED)
RPM is the rotational speed of the spindle in revolutions per
minute. In a milling machine or drill, the Spindle Speed is the
rotation of the attached cutting tool. In a turning machine, it is
the rotation of the attached workpiece. RPM can be calculated
given values for Diameter and Cutting Speed.
RPM – Milling
Calculate the Spindle Speed (RPM) when milling with a .375"
bit at a Cutting Speed of 300 sfm (surface feet per minute):
RPM
Diameter: .375″
KeySTROKe DISPLAy
O O 0.
1. Enter the bit Diameter:
. 3 7 5 d DIA
$
0. 375 INCH
2. Enter the Cutting Speed:
3 0 0 C CUT
$
300. feeT/MIN
3. Calculate the Spindle Speed (RPM):
RRPM 3056.
RCUT
$
300. feeT/MIN
RDIA
$
0.375 INCH
r R *RPM
$
3055.7749
* The calculated RPM is displayed as a rounded, whole number value.
r R
displays the stored RPM value in decimal oating point format
.
U 'ser s GUide — 27
RPM – Turning
Calculate the Spindle Speed (RPM) needed to turn a piece with
a 5" Diameter at a recommended Cutting Speed of 650 sfm:
KeySTROKe DISPLAy
O O 0 .
1. Enter the bit Diameter:
5 d DIA
$
INCH5.
2. Enter the Cutting Speed:
6 5 0 C CUT
$
feeT/MIN650.
3. Calculate the Spindle Speed (RPM):
R* RPM 497.
* Repeated presses of R will toggle through the inputs and outputs,
starting with the entered Cutting Speed.
RPM – Drilling
Calculate what the RPM (Spindle Speed) should be set to
when drilling into material with a recommended Cutting Speed
of 90 sfm using a .625" bit:
KeySTROKe DISPLAy
O O 0.
1. Enter the Diameter:
. 6 2 5 d DIA
$
INCH0.625
2. Enter the Cutting Speed:
9 0 C CUT
$
feeT/MIN90.
3. Calculate the RPM:
R* RPM 550.
* Repeated presses of R will toggle through the inputs and outputs,
starting with the entered Cutting Speed.
28 — Machinist calc™ Pro
FEED raTE
Feed Rate is the speed of the cutting tool’s movement relative
to the workpiece as the tool makes a cut. You can calculate
Feed Rate given values for Cutting Feed and RPM (Spindle
Speed). If you don’t know the Cutting Feed, you can calculate
Feed Rate with Feed per Tooth (Chip Load), Number of Teeth
and RPM.
Feed Rate – Based on Cutting Feed and RPM (for Turning)
Calculate the Feed Rate if you are turning a 1" steel round
stock down with a Cutting Feed of 0.031 Inches per revolution
and a rotational speed of 900 RPM (Spindle Speed):
KEYSTROKE DISPLAY
O O 0.
1. Enter the Cutting Feed:
. 0 3 1 c CUT
$
INCH/REV0.031
2. Enter the RPM:
9 0 0 R RPM
$
900.
3. Calculate the Feed Rate:
fFEED 27.9000 INCH/MIN
fRPM
$
900.
fCUT
$
INCH/REV0.031
Feed Rate – Based on Cutting Feed and RPM (for Drilling)
Calculate the Feed Rate for a drilling operation that is using a
recommended Cutting Feed of 0.004 Inch per revolution at 800
RPM (Spindle Speed):
KEYSTROKE DISPLAY
O O 0.
1. Enter the Cutting Feed:
4 B c CUT
$
INCH/REV0.004
U 'ser s GUide — 29
2. Enter the RPM:
8 0 0 R RPM
$
800.
3. Calculate the Feed Rate:
f*FEED 3.2000 INCH/MIN
* Repeated presses of f will toggle through the inputs and outputs,
starting with the entered RPM (Spindle Speed).
Feed Rate – Based on Feed per Tooth, RPM and # of Teeth
Calculate the Feed Rate for a four-uted end mill using a Feed
per Tooth (Chip Load) of 0.005 Inch turning at 1,000 RPM
(Spindle Speed):
RPM: 1000
Feed
Rate
Feed per Tooth:
0.005″
Number
of Teeth: 4
KEYSTROKE DISPLAY
O O 0.
1. Enter the Feed per Tooth:
5 B F FPT
$
0.005 INCH
2. Enter the Number of Teeth:
4 # TEETH
$
4.
KEYSTROKE DISPLAY
(cont’d)
30 — Machinist calc™ Pro
3. Enter the RPM:
1 0 0 0 R RPM
$
1000.
4. Calculate the Feed Rate:
fFEED 20.0000 INCH/MIN
fRPM
$
1000.
fCUT
$
INCH/REV 0.02 *
* This Cutting Feed is calculated based on the entered Feed/Tooth and
Number of Teeth. It, along with RPM, is then used to calculate the
Feed Rate.
cuTTINg SPEED
Cutting Speed is the speed of the workpiece surface relative
to the edge of the cutting tool during a cut, typically measured
in surface feet per minute. You can calculate Cutting Speed by
entering the Diameter of the tool or material you’re using and the
RPM (Spindle Speed).
Cutting Speed – Milling
Calculate the Cutting Speed for a mill using a .5" tool running at
1,250 RPM (Spindle Speed):
KEYSTROKE DISPLAY
O O 0.
1. Enter the Diameter of the tool:
. 5 d DIA
$
0.5 INCH
2. Enter the RPM:
1 2 5 0 R RPM
$
1250.
3. Calculate the Cutting Speed:
C
*
CUT 164. FEET/MIN
CDIA
$
0.5 INCH
KEYSTROKE DISPLAY
(cont’d)
U 'ser s GUide — 31
CRPM
$
1250.
r C
*
CUT
$
163.62462 FEET/MIN
* The calculated Cutting Speed is displayed as a rounded, whole
number value.
r C
displays the stored Cutting Speed value in
decimal oating point format.
Cutting Speed – Turning
Calculate the Cutting Speed when turning a 4" rod at 300 RPM
(Spindle Speed):
KEYSTROKE DISPLAY
O O 0.
1. Enter the Diameter of the rod:
4 d DIA
$
4. INCH
2. Enter the RPM:
3 0 0 R RPM
$
300.
3. Calculate the Cutting Speed:
C*CUT 314. FEET/MIN
* Repeated presses of C will toggle through the inputs and outputs,
starting with the entered Diameter.
Cutting Speed – Drilling
Calculate the Cutting Speed using a 10.5 mm drill bit with the
Spindle Speed set to 750 RPM:
KEYSTROKE DISPLAY
O O 0.
1. Enter the Diameter of the hole to be drilled:
1 0 . 5 m d DIA
$
10.5 MM
KEYSTROKE DISPLAY
(cont’d)
32 — Machinist calc™ Pro
2. Enter the RPM:
7 5 0 R RPM
$
750.
3. Calculate the Cutting Speed:
C*CUT 81. FEET/MIN
* Repeated presses of
C
will toggle through the inputs and outputs,
starting with the entered Diameter.
Cutting Speed – Using Metric Mode
If you know you’re going to be making your calculations in
metric units, you can easily set your calculator to Metric Mode
prior to entering values.
Calculate the Cutting Speed when using a #1 drill at 750 RPM
(Spindle Speed):
KEYSTROKE DISPLAY
O O 0.
1. Set calculator to Metric Mode:
g S S S + METRC UnITS
2. Enter the Drill Size:
1 D 1 DRILL SIZE
$
5.7912 MM
3. Store as the Diameter:
= d DIA
$
5.7912 MM
4. Enter the RPM:
7 5 0 R RPM
$
750.
5. Calculate the Cutting Speed:
C*CUT 14. M/MIN
6. Return calculator to U.S. Mode:
g S S S + US UnITS
(cont’d)
KEYSTROKE DISPLAY
U 'ser s GUide — 33
* Repeated presses of
C
will toggle through the inputs and outputs,
starting with the entered Diameter.
FEED PEr TOOTH (cHIP lOaD)
Feed per Tooth, or Chip Load, is the thickness of material
removed by each cutting surface. You can calculate Feed per
Tooth given values for Number of Teeth and Cutting Feed.
If the Cutting Feed is not known, the Feed per Tooth can be
calculated given values for Number of Teeth, Feed Rate and
RPM (Spindle Speed).
Feed per Tooth – based on cutting Feed and # of Teeth
Calculate Feed per Tooth (Chip Load) with a Cutting Feed of
0.024 Inch for 4 Teeth:
KEYSTROKE DISPLAY
O O 0.
1. Enter the Cutting Feed:
. 0 2 4 c CUT
$
INCH/REV0.024
2. Enter the Number of Teeth:
4 # TEETH
$
4.
3. Calculate the Feed per Tooth:
FFPT 0.0060 INCH
FTEETH
$
4.
FCUT
$
INCH/REV0.024
34 — Machinist calc™ Pro
Feed per Tooth – Based on Feed Rate, RPM and # of Teeth
Calculate Feed per Tooth (Chip Load) with a 12.8 Inch per
minute Feed Rate, 4 Teeth and a Spindle Speed of 800 RPM:
KEYSTROKE DISPLAY
OO 0.
1. Enter the Feed Rate:
12.8f FEED
$
INCH/MIN12.8
2. Enter the Number of Teeth:
4# TEETH
$
4.
3. Enter the Spindle Speed (RPM):
800R RPM
$
800.
4. Calculate the Feed per Tooth:
F* FPT 0.0040 INCH
* Repeated presses of
F
will toggle through the inputs and outputs,
starting with the entered Number of Teeth.
raDIal cHIP THINNINg
In a Milling operation when the depth of a cut is less than half
the diameter of the tool, you can use the Radial Chip Thinning
to determine a new, faster and more efcient Chipload or Feed/
Tooth value.
Radial Chip Thinning –
Based on Feed per Tooth, Tool Diameter and Cut Depth
Calculate Radial Chip Thinning value with a Feed Per Tooth of
0.006 Inch, a 1" Tool Diameter and a Cut Depth of 0.1 Inch.
KEYSTROKE DISPLAY
OO 0.
1. Enter the Feed per Tooth:
U 'ser s GUide — 35
6BF FPT
$
INCH0.006
2. Enter the Tool Diameter:
1d DIA
$
INCH1.
3. Enter Cut Depth:
.1gC (Cut Depth) DEPTH
$
. INCH0 1
4. Calculate the adjusted Feed per Tooth:
CADJST 0 0100 . INCH
5. Calculate the Radial Chip Thinning Factor:
CRCTF 1 6667 . INCH
CDIA
$
INCH1.
CFPT
$
INCH0.006
cuTTINg FEED
Cutting Feed is the distance the cutting tool or workpiece
advances during one revolution of the spindle, typically measured
in inches per revolution (IPR). You can calculate Cutting Feed
given values for Feed per Tooth (Chip Load) and Number of Teeth.
If these values are unknown, you can calculate Cutting Feed with
Feed Rate and RPM (Spindle Speed).
Cutting Feed – based on Feed per Tooth and # of Teeth
Calculate Cutting Feed with a Feed per Tooth (Chip Load) of
0.005 Inch and 4 Teeth:
KEYSTROKE DISPLAY
OO 0.
1. Enter the Feed per Tooth:
5BF FPT
$
INCH0.005
2. Enter the Number of Teeth:
4# TEETH
$
4.
(cont’d)
KEYSTROKE DISPLAY
36 — Machinist calc™ Pro
(cont’d)
3. Calculate the Cutting Feed:
cCUT 0.0200 INCH/REV
cFPT
$
INCH0.005
cTEETH
$
4.
Cutting Feed – based on Feed rate and rpM
KEYSTROKE DISPLAY
O O 0.
1. Enter the Feed Rate:
1 5 f FEED
$
INCH/MIN15.
2. Enter the Spindle Speed (RPM):
8 0 0 R RPM
$
800.
3. Calculate the Cutting Feed:
c*CUT 0.0188 INCH/REV
* Repeated presses of c will toggle through the inputs and outputs,
starting with the entered Feed Rate.
DrIll SIzES
The D
be entered as a:
KEYSTROKE DISPLAY
U 'ser s GUide — 37
The selected Drill Size is displayed along with its decimal Inch
equivalent. If the entered value doesn’t match a Drill Size, the next
smaller size is displayed. You can toggle through the available
sizes in increasing order with either the D key or the + key. The
- key displays the available sizes in decreasing order. To set the
displayed Drill Size, press O (or any other key).
Numeric Drill Size Entry
Enter a #36 Drill and toggle through the next larger available
sizes:
KEYSTROKE DISPLAY
OO
0.
1. Enter the Drill Size:
36D
36 DRILL SIZE
$
0.1065 INCH
2. Display the next larger available sizes:
D
2_75 MM DRILL SIZE
$
0.1083 INCH
D
7/64 DRILL SIZE
$
0.1094 INCH
D*
35 DRILL SIZE
$
0.1100 INCH
* Repeated presses of D display the next larger Drill Sizes. The +
and - keys will toggle forward and backward, respectively, through all
available Drill Sizes.
Letter Drill Size Entry
You can enter letter Drill Sizes by selecting an alphabet character
via Alpha Mode ( g8 ) and then storing it using the D key. The
desired letter can be selected by toggling through Alpha Mode
until the letter is reached or by specifying the numerical order of
the letter within the alphabet prior to entering Alpha Mode. Both
methods are shown below.
Select Drill Size E by toggling though Alpha Mode. Then, select
Drill Size G by entering the numerical order of the letter (the letter
G is 7th in the alphabet).
(cont’d)
38 — Machinist calc™ Pro
(cont’d)
KEYSTROKE DISPLAY
OO
0.
1. Enter Alpha Mode:
g8 (Alpha)
ALPHA A
2. Toggle until the letter E is displayed:
8888 ALPHA
E
3. Enter as Drill Size:
DE DRILL SIZE
$
INCH0.2500
4. View next larger available sizes:
D6_40
MM DRILL SIZE
$
INCH0.2520
D6_50
MM DRILL SIZE
$
INCH0.2559
D* F DRILL SIZE
$
INCH0.2570
5. Enter order of letter G and enter Alpha Mode:
7g8 (Alpha)
ALPHA G
6. Enter as Drill Size:
D* G DRILL SIZE
$
INCH0.2610
* Repeated presses of
D
display the next larger Drill Sizes. The
+
and
-
keys will toggle forward and backward, respectively, through all
available Drill Sizes.
Inch Drill Size Entry
Enter hole sizes of 0.3 Inch, 1 Inch and 1-19/64 Inches. After
entering each size, toggle through the available sizes to view the
next larger and next smaller sizes.
KEYSTROKE DISPLAY
OO
0.
U 'ser s GUide — 39
1. Enter the 0.3" hole size and view next larger and next smaller
sizes:
.3iD 7_60
MM DRILL SIZE
$
INCH0.2992
DN DRILL SIZE
$
INCH0.3020
-- 19/64 DRILL SIZE
$
INCH0.2969
2. Enter the 1" hole size and view next larger and next smaller
sizes:
1iD
1 DRILL SIZE
$
INCH1.0000
D
25_50 MM DRILL SIZE
$
INCH1.0039
-- 63/64 DRILL SIZE
$
INCH0.9844
3. Enter the 1-19/64" hole size and view next larger and next
smaller sizes:
1i19/64D 19/64 DRILL SIZE
$
1.
2969 INCH
*
D33_00 1.2992MM DRILL SIZE $ INCH
-- 9/32 1DRILL SIZE $
.2813 INCH
*
* Note that even though the Drill Size is shown on the upper left of the
display without the whole Inch value (e.g. 19/64 instead of 1-19/64),
the decimal inch equivalent reects the actual size.
Millimeter Drill Size Entry
Enter a 5.7 mm hole size and toggle through the available sizes
to view the next larger and next smaller sizes:
KEYSTROKE DISPLAY
OO
0.
1. Enter the hole size as millimeters:
5.7mD 5_70
MM DRILL SIZE
$
0.2244 INCH
2. View next larger and next smaller sizes:
D5_75
MM DRILL SIZE
$
0.2264 INCH
-- 2
DRILL SIZE
$
0.2210 INCH
KEYSTROKE DISPLAY
40 — Machinist calc™ Pro
DrIll POINT
The Drill Point function calculates the Drill Point Cut Depth
(length) of the stored Drill Size. By default, the calculation is
based on a Cutting Angle of 118°. If a different Angle is desired,
it can be stored using the Drill Point function (for example,
120gD
stores 120°).
Find the Drill Point Cut Depth for a 1/2" drill with a 118° Cutting
Angle. Then, nd the Cut Depth using a 127° Angle.
KeySTROKe DISPLAy
OO
0.
1. Enter the Drill Size:
1/2D
1/2
DRILL SIZe $
0.5000 INCH
2. Enter 118° Angle and calculate the Drill Point Cut Depth:
118gD (Drill Point) DePTH DRILL
.0.1502 INCH
D $ANGLe DRILL
118.°
D
1/2
DRILL SIZe $
0.5000 INCH
3. Enter 127° angle and calculate the Drill Point cut length:
127gD (Drill Point) DePTH DRILL $
0.1246 INCH
THrEaD SIzINg
The
t
key allows you to enter a numeric, fractional or metric
Thread Size and then toggle through the various available
Thread characteristics, as shown in the tables provided later in
this section.
When using the
t
key, the rst entry is considered the
Thread Size. Upon entering the Thread Size, the Threads
per Inch (TPI) or Pitch is required. If the entered Thread Size
is a standard size, continuous presses of the
t
key will
toggle through the available common TPI or Pitches. Once the
desired TPI/Pitch is reached, pressing O stores the Thread
U 'ser s GUide — 41
Size. If the Thread Size you enter is not a standard size or if
you have a non-common TPI/Pitch, you will need to directly
enter the TPI/Pitch value, pressing
t
after entering it in order
to store the Thread Size. Both of these entry methods are
covered in the examples provided within this section.
The following species the entry ranges that the calculator
allows for the Thread Size and TPI/Pitch values for numeric,
fractional and metric Thread Sizes:
Thread Size TPI/Pitch
Numeric 0, 1, 2, 3, 4, 5, 6,
8, 10, 12, 14
less than 100
Fractional 0.06" to 6" less than 100
Metric 1 mm to 300 mm less than or equal to 10
Note: Entries outside of the ranges mentioned above will result in an
Entry Error.
The following tables list the available Thread characteristics
provided by the Thread Size function. Note that there are two
separate listings, one for Internal Threads and one for External
Threads. The listing shown within the Thread Size function
is determined by the set Thread Classication (see Thread
Classication section).
Internal Thread
Thread Size Minimum Pitch Diameter
Cut Tap Drill Size* Maximum Pitch Diameter
Roll Tap Drill Size* Minimum Minor Diameter
Close Fit Drill Size* Maximum Minor Diameter
Free Fit Drill Size* Minimum Major Diameter
* If the resulting hole size is greater than 2 Inches or 50 mm, the actual
hole size will be displayed instead of adjusting to the closest Drill Size.
(cont’d)
42 — Machinist calc™ Pro
External Thread
Thread Size Minimum Pitch Diameter
Cut Rod Size Maximum Major Diameter
Roll Shank Size Minimum Major Diameter
Maximum Pitch Diameter Maximum Minor Diameter
Thread Classication
With the you can choose between Internal Machinist Calc Pro
and External Threads. Entering a U.S. Thread Size will allow you
to choose among U.S. Thread Classes as shown below.
Thread Type U.S. Thread Classes
Internal 1B 2B* 3B
External 1A 2A 3A
Entering a Metric Thread will allow you to choose among Metric
Thread Tolerance Classes as shown below.
Thread Type Metric Thread Tolerance Classes
Internal 3G
3H
4G
4H
5G
5H
6G
6H*
7G
7H
8G
8H
9G
9H
External
3g
3h
3e
3f
4g
4h
4e
4f
5g
5h
5e
5f
6g
6h
6e
6f
7g
7h
7e
7f
8g
8h
8e
8f
9g
9h
9e
9f
* Default settings
Changing Thread Classes
To display the current Thread Classication, press gb .
Repeated presses of b will toggle between External and
Internal Thread Types. You can change the number of a
Thread Class by entering the number of the desired class/
grade and pressing gb .
(cont’d)
U 'ser s GUide — 43
Changing a U.S. Thread Classication
KeySTROKe DISPLAy
g*
ALL CLeARed
1. Recall the current Thread Classication:
gb
(Thread Class)
INT 2b
2. Change to U.S. External Thread Class 2:
b
eXT 2A
3. Change to U.S. External Thread Class 1:
1gb
(Thread Class)
eXT 1A
4. Change to U.S. Internal Thread Class 1:
b
INT 1b
Changing a Metric Thread Classication
Changing a Metric Thread Tolerance Class is done in the same
manner, with several selections available for Internal and External
Threads.
KeySTROKe DISPLAy
g*
ALL CLeARed
1. Enter a Tolerance Grade of 4:
4gb
(Thread Class)
INT 4H MM
2. Toggle through the available Tolerance Positions for the entered
Grade:
beXT 4G MM
beXT 4H MM
beXT 4e MM
beXT 4f MM
bINT 4G MM
bINT 4H MM
(cont’d)
44 — Machinist calc™ Pro
3. Enter a Tolerance Grade of 6 and toggle through the available
Tolerance Positions for the entered Grade:
6 g b
(Thread Class)
INT 6H MM
bEXT 6G MM
bEXT 6H MM
b*EXT 6E MM
* Repeated presses of b will continue to toggle through the available
Tolerance Positions of the specied Grade.
Note: The number 3 can be entered to select both U.S. and Metric
classes. If no Thread Size is stored when accessing the Thread
Classication function, the U.S. Class will always be displayed. In order
to select a Tolerance Class with a Grade of 3 for a Metric Thread Size,
the Metric Thread Size must be stored prior to accessing the Thread
Classication function.
Numeric Thread Size
Enter a #8-32 screw and toggle through the available Internal
Thread (Class 2B) characteristics, then switch to External
Thread (Class 2A) and toggle through the available Thread
characteristics.
Note: The default U.S. Thread Class is 2B (Internal). To view the
current Thread Class, press
g b
. To change the class, press
b
again.
Thread Size calculations for Pitch, Major, and Minor Diameter
attributes are compliant with ANSI/ASME B.1.1-2003 and ANSI/ASME
B.1.13M-2005.
KEYSTROKE DISPLAY
g
*
ALL CLEAREd
1. Verify Thread Class is set to 2B:
g b (Thread Class)
INT 2B
KEYSTROKE DISPLAY
(cont’d)
U 'ser s GUide — 45
2. Enter the Thread Size:
8 t
SIZe 8 –
3. Enter the TPI and store the nal Thread Size:
32t
THReD SIZe
$
8 – 32
4. Find the available Internal Thread characteristics:
t(Cut Tap Drill Size)
TAP DRILL SIZe 29
t(Roll Tap Drill Size)
R-TAP 3.75 DRILL SIZe MM
t(Close Fit Drill Size) CLOSe 18DRILL SIZe
t(Free Fit Drill Size) fRee 16DRILL SIZe
t(Min. Internal Pitch Diameter) PTCH- 0.1437 SIZe INCH
t(Max. Internal Pitch Diameter) PTCH+ 0.1475 SIZe INCH
t(Min. Internal Minor Diameter) MINR- 0.1300 SIZe INCH
t(Max. Internal Minor Diameter) MINR+ 0.1390 SIZe INCH
t(Min. Internal Major Diameter)
MAJR- 0.1640 SIZe INCH
5. Switch to Thread Class 2A and nd the available External
Thread characteristics:
g b b(Thread Class) eXT 2A
tTHReD SIZe $
8 –
32
t(Rod Size for thread cutting) ROD 0.1640 SIZe INCH
t(Rod Size for cold forming) CfORM 0.1412 SIZe INCH
t(Max. External Pitch Diameter) PTCH+ 0.1428 SIZe INCH
t(Min. External Pitch Diameter) PTCH- 0.1399 SIZe INCH
t(Max. External Major Diameter) MAJR+ 0.1631 SIZe INCH
t(Min. External Major Diameter) MAJR- 0.1571 SIZe INCH
t(Max. External Minor Diameter) MINR+ 0.1259 SIZe INCH
KeySTROKe DISPLAy
46 — Machinist calc™ Pro
Fractional Thread Size
Find the available Internal and External Thread characteristics
for a 1/4-28 screw.
KEYSTROKE DISPLAY
g
*
ALL CLEAREd
1. Verify Thread Class is set to 2B:
g b (Thread Class) INT 2B
2. Enter the Thread Size:
1 / 4 t SIZE
1/4 –
INCH
3. Enter the TPI and store the nal Thread Size:
2 8 t
THRED SIZE
$
1/4 – 28 INCH
4. Find the available Internal Thread characteristics:
t(Cut Tap Drill Size) TAP DRILL SIZE 3
t
(Roll Tap Drill Size)
R-TAP 5.9 DRILL SIZE MM
t
(Close Fit Drill Size)
CLOSE FDRILL SIZE
t
(Free Fit Drill Size)
FREE HDRILL SIZE
t
(Min. Internal Pitch Diameter)
PTCH- 0.2268 SIZE INCH
t
(Max. Internal Pitch Diameter)
PTCH+ 0.2311 SIZE INCH
t
(Min. Internal Minor Diameter)
MINR- 0.2110 SIZE INCH
t
(Max. Internal Minor Diameter)
MINR+ 0.2200 SIZE INCH
t
(Min. Internal Major Diameter)
MAJR- 0.2500 SIZE INCH
5. Switch to Thread Class 2A and nd the available External
Thread characteristics:
g b b
(Thread Class) EXT 2A
t
THRED SIZE $ 1/4 – 28 INCH
t
(Rod Size for Thread Cutting) ROD 0.2500 SIZE INCH
t
(Rod Size for Cold Forming) CFORM 0.2239 SIZE INCH
t
(Max. External Pitch Diameter)
PTCH+ 0.2258 SIZE INCH
U 'ser s GUide — 47
t
(Min. External Pitch Diameter)
PTCH- 0.2225 SIZE INCH
t
(Max. External Major Diameter)
MAJR+ 0.2490 SIZE INCH
t
(Min. External Major Diameter)
MAJR- 0.2425 SIZE INCH
t
(Max. External Minor Diameter)
MINR+ 0.2065 SIZE INCH
Metric Thread Size
Find the available Internal and External Thread characteristics
for a M5 x 0.75 screw with a Tolerance Class of 4H.
Note: The default Metric Tolerance Class is 6H (Internal). To view
the current Tolerance Class, press
g b
after entering the desired
Metric Thread Size. To change the class, press
b
again.
KEYSTROKE DISPLAY
g
*
ALL CLEAREd
1. Set Tolerance Class to Internal 4H:
4 g b (Thread Class) INT 4HMM
2. Enter the Thread Size:
5 m t
SIZE MM 5. –
3. Enter the Thread Pitch and store the nal Thread Size:
0 . 7 5 t
THRED SIZE
$
5. – 0.75 MM
4. Find the available Internal Thread characteristics:
t
(Cut Tap Drill Size)
TAP DRILL SIZE MM 4.25
t
(Roll Tap Drill Size)
R-TAP 14DRILL SIZE
t
(Close Fit Drill Size)
CLOSE 5.3 DRILL SIZE MM
t
(Free Fit Drill Size)
FREE 5.8 DRILL SIZE MM
t
(Min. Internal Pitch Diameter)
PTCH- 4.5130 SIZE MM
t
(Max. Internal Pitch Diameter)
PTCH+ 4.5605 SIZE MM
t
(Min. Internal Minor Diameter)
MINR- 4.1880 SIZE MM
t
(Max. Internal Minor Diameter)
MINR+ 4.3060 SIZE MM
(cont’d)
KEYSTROKE DISPLAY
48 — Machinist calc™ Pro
(cont’d)
t
(Min. Internal Major Diameter)
MAJR- 5.0000 SIZE MM
5. Switch to External 4g Tolerance Class and nd the available
External Thread characteristics:
g b b
(Thread Class)
EXT 4GMM
t
THRED SIZE
$
5. – 0.75 MM
t(Rod Size for Thread Cutting)
ROD 5.0000 SIZE MM
t(Rod Size for Cold Forming)
CFORM 4.4520 SIZE MM
t
(Max. External Pitch Diameter)
PTCH+ 4.4910 SIZE MM
t
(Min. External Pitch Diameter)
PTCH- 4.4350 SIZE MM
t
(Max. External Major Diameter)
MAJR+ 4.9780 SIZE MM
t
(Min. External Major Diameter)
MAJR- 4.8880 SIZE MM
t
(Max. External Minor Diameter)
MINR+ 4.1660 SIZE MM
Custom Thread Percentage
The Machinist Calc Pro uses a default Thread Grip Percentage
of 75% when calculating Tap Drill sizes. With the custom
Percentage Thread function, you can enter a different value to
calculate Tap Drill sizes.
Calculate the Tap Drill Size for a 1/4-26 screw, then change
the Thread Grip Percentage to 50% and calculate the new
Tap Drill Size.
KEYSTROKE DISPLAY
g
*
ALL CLEAREd
1. Enter the Thread Size and calculate the Cut Tap and Roll Tap
Drill Sizes:
1 / 4 t
SIZE INCH 1/4 –
26t
THRED SIZE
$
1/4 –
26 INCH
t(Cut Tap Drill Size)
TAP DRILL SIZE 3
t* (Roll Tap Drill Size)
R-TAP 5.9 DRILL SIZE MM
KEYSTROKE DISPLAY
U 'ser s GUide — 49
2. C
hange the Thread Grip Percentage to 50% and calculate
the new Cut Tap and Roll Tap Drill Sizes:
5 0 g t
(% Thread)
THRD% SIZE
$
50.
t
THRED SIZE
$
1/4 – 26 INCH
t(Cut Tap Drill Size)
TAP DRILL SIZE 1
t* (Roll Tap Drill Size)
R-TAP 6. DRILL SIZE MM
* Repeated presses of
t
will toggle through the inputs and outputs,
starting with the Close Fit Drill Size.
WIrE SIzES aND 3-WIrE mEaSurEmENTS
Wire Size
If you know your Thread Size, you can nd the Ideal, Maximum
and Minimum Wire Sizes you can use for that size Screw
Thread.
Find the Ideal, Maximum and Minimum Wire Sizes for
measuring a 3/8" Thread with 16 Threads per Inch:
KEYSTROKE DISPLAY
O O
0.
1. Enter the Thread Size:
3 / 8 t
SIZE 3/8
–
INCH
2. Enter the Threads per Inch and store the nal Thread Size:
1 6 t THRED
SIZE
$
3/8
–
16
INCH
3. Find the Ideal, Maximum and Minimum Wire Sizes:
g f (Wire Size) IDEAL 0.0361 SIZE
INCH
fMAX 0.0563 SIZE
INCH
fMIN 0.0350 SIZE
INCH
KEYSTROKE DISPLAY
50 — Machinist calc™ Pro
3-Wire Measurement – Known Thread Size and Wire Size
You can nd the Minimum and Maximum 3-Wire Measurements
as well as the Pitch Diameters if you know the Thread Size and
the Wire Size you want to use.
Note: When solving for 3-Wire Measurements and Pitch Diameters, the
calculator assumes the equivalent External Thread Type if an Internal
Thread Type is set (i.e., Internal 2B is assumed External 2A for U.S.
Threads; Internal 6H is assumed External 6H for Metric Threads).
Find the Minimum and Maximum allowable 3-Wire
Measurements and Pitch Diameters for a 3/8
-
16, Class 2A
(External) screw using 0.040" wire:
KEYSTROKE DISPLAY
O O
0.
1. Enter the Thread Size:
3 / 8
t
SIZE 3/8
–
INCH
2. Enter the Threads per Inch and store the nal Thread Size:
1 6 t THRED
SIZE
$
3/8
–
16 INCH
3. Set the Thread Class to 2A:
2 g b
* (Thread Class)
EXT 2A
* If necessary, continue pressing b until the desired External Thread
Class is displayed.
4. Enter the Wire Size*:
. 0 4 g f
(Wire Size)
WIRE
SIZE
$
0.04 INCH
5. Find the Minimum 3-Wire Measurement:
g R (3-W Measure) 3WMIN
0.3946SIZE INCH
6. Find the Maximum 3-Wire Measurement:
R3WMAX
0.3990SIZE INCH
7. Find the Minimum Pitch Diameter:
RPTCH-
0.3287SIZE INCH
U 'ser s GUide — 51
8. Find the Maximum Pitch Diameter:
RPTCH+
0.3331SIZE INCH
RWIRE
SIZE
$
0.04 INCH
* If no Wire Size is entered, the calculated Ideal Wire Size will be used
to nd the 3-Wire Measurement.
Pitch Diameter – Known 3-Wire Measurement and Wire Size
You can also nd the measured Pitch Diameter if you know
the 3-Wire Measurement and the Wire Size used to obtain the
measurement.
Find the Pitch Diameter of a 3/8-16, Class 2A (External) screw
with a 3-Wire Measurement of 0.3975 Inch obtained using a
0.040" wire:
KEYSTROKE DISPLAY
OO
0.
1. Enter the Thread Size:
3/8
t
SIZE 3/8
–
INCH
2. Enter the Threads per Inch and store the nal Thread Size:
16t THRED
SIZE
$
3/8
–
16 INCH
3. Set the Thread Class to 2A:
2gb * (Thread Class) EXT 2A
* If necessary, continue pressing b until the desired External Thread
Class is displayed.
4. Enter the Wire Size*:
.04gf (Wire Size) WIRE
SIZE
$
0.04 INCH
5. Enter the 3-Wire Measurement:
.3975gR�
(3-W Measure) 3WIRE
SIZE
$
0.3975 INCH
(cont’d)
KEYSTROKE DISPLAY
52 — Machinist calc™ Pro
6. Find the Pitch Diameter:
RP-DIA
0.3316 SIZE INCH
RWIRE
SIZE
$
0.04 INCH
* If no Wire Size is entered, the calculated Ideal Wire Size will be used
to nd the Pitch Diameter.
BOlT PaTTErN
With the Machinist Calc Pro, you can determine a Bolt Pattern by
entering the Bolt Circle Diameter, the Number of Bolt Holes and
the Angle of the rst bolt hole (optional). You can also enter an
optional Center x and y-coordinate of the Bolt Pattern.
In addition to calculating the x and y-coordinates for each bolt
hole, the Bolt Pattern function also calculates the hole center-to-
center spacing (i.e. on-center distance from hole to hole).
Start
AngleX
C
,Y
C
X
2
,Y
2
X
1
,Y
1
X
3
,Y
3
Bolt Pattern
Calculate the Bolt Pattern for a layout with a 3.5" Diameter, a 20°
Start Angle and 3 Bolts. The Center x-coordinate is 10 Inches and
the center y-coordinate is 15 Inches.
Note: When determining angles, 0° is at the 3 o’clock position and the
rotation goes counterclockwise.
KEYSTROKE DISPLAY
OO
0.
1. Enter the Center x-coordinate:
(cont’d)
KEYSTROKE DISPLAY
U 'ser s GUide — 53
10ia ADJ
$
10. INCH
2. Enter the Center y-coordinate:
15ip OPP
$
15. INCH
3. Enter the Start Angle:
20n ANGLe
$
20.°
4. Enter Bolt Circle Diameter:
3.5d DIA
$
3.5 INCH
5. Enter the Number of Bolts:
3b bOLTS
$
3.
6. Calculate Center-to-Center Spacing and the x and y
coordinates:
b(Center-to-Center Spacing) OC-OC 3.0311 INCH
bX-01 11.6445 INCH
by-01 15.5985 INCH
bX-02 8.6594 INCH
by-02 16.1249 INCH
bX-03 9.6961 INCH
by-03 13.2766 INCH
bDIA
$
3.5
INCH
bXoc
$
10. INCH
byoc
$
15. INCH
bANGLe
$
20°
KeySTROKe DISPLAy
54 — Machinist calc™ Pro
rIgHT TrIaNglE FuNcTIONS
With the , you can easily solve Right Triangle Machinist Calc Pro
problems by simply entering two of four variables: Adjacent,
Opposite, Hypotenuse or Angle.
Right Triangle – based on Adjacent and Opposite Legs
Calculate the Hypotenuse, Angle and Adjacent Angle of a right triangle
with an Adjacent Leg of 3 Inches and an Opposite Leg of 4 Inches:
Opposite
Leg: 4
Hypotenuse
A
B
Adjacent
Leg: 3
KEYSTROKE DISPLAY
OO
0.
1. Enter the Adjacent Leg length:
3ia ADJ $
3.
INCH
2. Enter the Opposite Leg length:
4ip OPP $
4.
INCH
3. Solve for the Hypotenuse:
hHYP 5.0000 INCH
4. Solve for the Angle:
nANGLE 53.130102° $
5. Solve for the Adjacent Angle:
nADJ<Ø
36.8699°
U 'ser s GUide — 55
Right Triangle – based on hypotenuse and Angle
Calculate the Adjacent Angle, Adjacent Leg and Opposite Leg
of a right triangle with a Hypotenuse of 12 Inches and a known
Angle of 35.34°:
KEYSTROKE DISPLAY
OO
0.
1. Enter the Hypotenuse:
12ih HYP $
12.
INCH
2 Enter the known Angle:
35.34n ANGLE 35.34° $
3. Solve for the Adjacent Angle:
nADJ<Ø 54.6600°
4. Solve for the Adjacent Leg:
aADJ
9.7888 INCH
5. Solve for the Opposite Leg:
pOPP 6.9411271 $ INCH
cIrclE calculaTIONS
Circumference and Area – based on Diameter
Find the Area, Circumference and Radius of a circle with a
Diameter of 11 Inches:
KEYSTROKE DISPLAY
OO 0.
11d DIA
$
11. INCH
dAREA 95.0332 SQ INCH
dCIRC 34.5575 INCH
gd (Radius) RAD
$
5.5 INCH
56 — Machinist calc™ Pro
Circumference and Area – based on radius
Find the Diameter, Area and Circumference of a circle with a
Radius of 3-1/4 Inches:
KEYSTROKE DISPLAY
OO 0.
3i1/4gd (Radius) RAD
$
3-1/4 INCH
dDIA
$
6-1/2 INCH
dAREA 33.1831 SQ INCH
dCIRC 20-27/64 INCH
BaSIc D:m:S aND TrIgONOmETrY ExamPlES
Converting Degrees:Minutes:Seconds
Convert 23° 42 39" to decimal degrees:'
KEYSTROKE DISPLAY
OO 0.
23.42.39 DMS 23.42.39
g. (dms◄►deg) 23.710833°
Convert 44.29° to degrees:minutes:seconds format:
KEYSTROKE DISPLAY
OO 0.
44.29g. (dms◄►deg) DMS 44.17.24°
Note: Improperly formatted entries will be redisplayed in the correct
convention after any operator key is pressed. For example, 30° 89'
entered will be corrected and displayed as 31° 29' 0" or 31.483333°.
Time Calculations Using D:M:S
Add 7 Hours 45 Minutes 33 Seconds to 11 Hours 16 Minutes 20
Seconds:
KEYSTROKE DISPLAY
OO 0.
U 'ser s GUide — 57
7.45.33+ DMS 7.45.33°
11.16.20= DMS 19.01.53°
Trigonometric Functions
The following drawing and formulas list basic trigonometric
formulas, for your reference:
Given side A and angle a, nd:
Side C A , a gF (Cos) =
(e.g., 3i,53.13gF (Cos) =)
Side B A * a gc (Tan) =
Angle b 90° - a =
Given side A and angle b, nd:
Side B A , b gc (Tan) =
Side C A , b g# (Sine) =
Angle a 90° - b =
Given side B and angle a, nd:
Side A B , a gc (Tan) =
Side C B , a g# (Sine) =
(cont’d)
KEYSTROKE DISPLAY
58 — Machinist calc™ Pro
Given side C and angle a, nd:
Side A C * a gF (Cos) =
Side B C * a g# (Sine) =
Given side A and side C, nd:
Angle a A , C =gp (ArcCos)
Angle b A , C =ga (ArcSine)
Given side B and angle b, nd:
Side C B , b gF (Cos) =
Side A B * b gc (Tan)=
APPENDIX A – DEFAULT SETTINGS
After a Clear All ( g* ), your calculator will return to the follow-
ing settings:
STORED VALUES DEFAULT VALUE
Number of Teeth 1.
Drill Point Angle 118°
Weight per Volume 490 pounds per cubic foot
% Thread 75%
Thread Classication
US Threads Internal 2B
Metric Threads Internal 6H
If you replace your batteries or perform a Full Reset* (press
o, hold down * and press O) your calculator will return to
the following settings (in addition to those listed above):
PREFERENCE SETTINGS DEFAULT VALUE
Fractional Resolution 1/64"
Functional Result Rounding 0.0000
Default Unit Format US
Area Answer Format Standard
(cont’d)
U 'ser s GUide — 59
Volume Answer Format Standard
Fractional Mode Standard
Mathematical Operation Order of Operations Method
* Depressing the Reset button located above the C key will also
perform a Full Reset.
APPENDIX B – prEFErENcE SETTINGS
The Machinist Calc Pro has Preference Settings that allow you
to customize or set desired unit formats and calculations. If you
replace your batteries or perform a Full Reset* (press o, hold
down *, and press O), your calculator will return to the following
settings (in addition to those listed on the previous page), with the
default setting for each preference listed rst:
* Depressing the Reset button located above the C key will also per-
form a Full Reset.
PREFERENCE OPTIONS
1) Fractional
Resolution
– 1/64: displays fractional values to the near-
est 64th of an Inch.
– 1/2: displays fractional values to the nearest
half Inch.
– 1/4: displays fractional values to the nearest
quarter of an Inch.
– 1/8: displays fractional values to the nearest
8th of an Inch.
– 1/16: displays fractional values to the near-
est 16th of an Inch.
– 1/32: displays fractional values to the near-
est 32nd of an Inch.
(cont’d)
PREFERENCE SETTINGS DEFAULT VALUE
60 — Machinist calc™ Pro
2) Functional
Result
Rounding
– 0.0000: calculation results using Machin-
ist functions are displayed to four decimal
places.
– 0.000: calculation results using Machinist
functions are displayed to three decimal
places.
– FLOAT: calculation results using Machinist
functions are always displayed to the maxi-
mum number of decimal places.
3) Default Unit
Format
– US: unitless values stored within Machinist
functions are automatically assigned the
corresponding default U.S. units of the
selected function.
– METRIC: unitless values stored within
the Machinist functions are automatically
assigned the corresponding default Metric
units of the selected function.
4) Area Answer
Format
– Standard: if units entered are the same
– e.g., Feet x Feet – area answers will
remain in this format (Square Feet), but if
units entered are different – e.g., Inches x
Feet – area answers will be displayed in
Square Feet.
– Square Feet: area answers always
displayed in Square Feet, regardless of
unit entry – e.g., Inches x Inches = Square
Feet.
– Square Inches: area answers always
displayed in Square Inches, regardless
of unit entry – e.g., Feet x Feet = Square
Inches.
– Square Meters: area answers always
displayed in Square Meters, regardless
of unit entry – e.g., Feet x Feet = Square
Meters.
(cont d)’
U 'ser s GUide — 61
5) Volume
Answer
Format
– Standard: if units entered are the same
– e.g., Feet x Feet x Feet – the answer will
remain in this format (Cubic Feet), but if units
entered are different – e.g., Feet x Feet x
Inches – volume answer will be displayed in
Cubic Feet.
– Cubic feet: volume answers always
displayed in Cubic Feet, regardless of unit
entry – e.g., Inches x Inches x Inches = Cubic
Feet.
– Cubic Meters: volume answers always
displayed in Cubic Meters, regardless of
unit entry – e.g., Feet x Feet x Feet = Cubic
Meters.
– Cubic Inches: volume answers always
displayed in Cubic Inches, regardless of unit
entry – e.g., Feet x Feet x Feet = Cubic Inches.
6) Fractional
Mode
– Standard: fractions are displayed to the
nearest fraction.
– Constant: fractions are displayed in the set
Fractional Resolution.
7) Mathematical
Operation
– Order: the calculator uses the Order of
Operations Method (10 + 4 x 5 = 30).
– Chain: the calculator uses the Chaining
Method (as entered: 10 + 4 x 5 = 70).
62 — Machinist calc™ Pro
APPENDIX C – cArE INSTrUcTIONS
Please follow the guidelines listed in this section for proper
care and operation of your calculator. Not following the
instructions listed below may result in damage not covered by
your warranty. Refer to the section on page 69 WArrANTy
for more details.
Do not expose calculator to temperatures outside the operating
temperature range of 32ºF – 104ºF (0ºC – 40ºC).
Do not expose calculator to high moisture such as submer-
sion in water, heavy rain, etc.
APPENDIX D – AccUrAcy/ErrOrS, AUTO
ShUT-OFF, bATTErIES, rESET
accuracY/ErrOrS
Accuracy/Display Capacity — Your calculator has a twelve-digit
display made up of eight digits (normal display) and four fractional
digits. You may enter or calculate values up to 99,999,999.99.
Each calculation is carried out internally to 12 digits.
Errors — When an incorrect entry is made, or the answer is
beyond the range of the calculator, an error message will dis-
play. To clear an error condition you must press the
key
once. At this point, you must determine what caused the error
and re-key the problem.
Error Codes
DISPLAY ERROR TYPE
OFLO Overflow (too large)
MATH Error Divide by 0
DIM Error Dimension error
ENT Error Invalid entry error
NONE Attempt to access cleared
Thread Size or Drill Size
Value; Invalid RCT Calculation
Produkt Specifikationer
| Mærke: | Calculated Industries |
| Kategori: | kalkulator |
| Model: | Machinist Calc Pro |
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