Calculated Industries Machinist Calc 4086 User manual

Us e r 'sGU i d e — 1
MACHINIST CALC™AND
MACHINIST CALC™ PRO
The Machinist Calc™ Machining Math and Reference Tool (Model
4086) and the Machinist Calc™ Pro Advanced Machining Math and
Reference Tool (Model 4087) both provide fast, precise solutions
for your every day machining calculations. With the Machinist Calc/
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.
This User’s Guide has definitions, examples and instructions
for both calculators. Information specific to a particular model
is indicated in the Table of Contents and throughout the User’s
Guide.
Both calculators will provide you with hundreds of machining-
specific calculations, including:
• Cutting Speed, Spindle Speed (RPM)
• Feed Rate, Cutting Feed, Feed per Tooth (Chip Load)
• Built-in Drill and Thread Size reference tables
• Bolt Pattern hole layouts
• Work in and convert between U.S. and Metric units, including:
• Decimal Inches/Mils
• Feet-Inch-Fractions
• m, mm, cm
• Area, Volume and Weight
In addition, the Machinist Calc Pro (Model 4087) has:
• Advanced Built-in Drill and Thread Size reference tables
• Drill Point Cut Depth solutions
• Wire Sizes and 3-Wire Measurements
• Advanced Bolt Pattern hole layouts with center x, y coordinate
• Right triangle math
• Trigonometric solutions

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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
(NOT AVAILABLE ON MODEL 4086) ........................... 7
Miscellaneous Functions ............................................................................ 8
Machinist Function Keys ............................................................................. 9
SETTING FRACTIONAL RESOLUTIONS.................................................. 13
Permanently Set Fractional Resolution .................................................... 13
Temporarily Set Fractional Resolution...................................................... 14
PREFERENCE SETTINGS......................................................................... 14
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 .......................................... 19
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 ............................................................... 23
USING THE MACHINIST CALC/MACHINIST CALC PRO ........................... 25

Us e r 'sGU i d e — 3
CUTTING SPEED ....................................................................................... 25
Cutting Speed – Milling............................................................................. 26
Cutting Speed – Turning ........................................................................... 26
Cutting Speed – Drilling............................................................................ 27
Cutting Speed – Using Metric Mode......................................................... 27
RPM (SPINDLE SPEED)............................................................................. 28
RPM – Milling............................................................................................ 28
RPM – Turning .......................................................................................... 29
RPM – Drilling........................................................................................... 30
FEED PER TOOTH (CHIP LOAD)............................................................... 30
Feed per Tooth – Based on Cutting Feed and # of Teeth ........................ 30
Feed per Tooth – Based on Feed Rate, RPM and # of Teeth .................. 31
CUTTING FEED .......................................................................................... 31
Cutting Feed – Based on Feed per Tooth and # of Teeth ........................ 32
Cutting Feed – Based on Feed Rate and RPM ........................................ 32
FEED RATE................................................................................................. 33
Feed Rate – Based on Cutting Feed and RPM (for Turning) ................... 33
Feed Rate – Based on Cutting Feed and RPM (for Drilling) .................... 33
Feed Rate – Based on Feed per Tooth, RPM and # of Teeth .................. 34
DRILL SIZES ............................................................................................... 35
Numeric Drill Size Entry............................................................................ 35
Letter Drill Size Entry ................................................................................ 36
Inch Drill Size Entry .................................................................................. 37
Millimeter Drill Size Entry.......................................................................... 38
Drill Point (NOT AVAILABLE ON MODEL 4086) ........................................................ 38
THREAD SIZING......................................................................................... 39
Basic Thread Sizing .................................................................................. 39
Numeric Thread Size – Model 4086 ......................................................... 40
Fractional Thread Size – Model 4086....................................................... 42
Metric Thread Size – Model 4086............................................................. 43
Thread Classication (NOT AVAILABLE ON MODEL 4086) ..................................... 45
Changing Thread Classes ........................................................................ 45

4 — Ma c h i n i s t ca l c ™/ Ma c h i n i s t ca l c ™Pr o
Changing a U.S. Thread Classication..................................................... 46
Changing a Metric Thread Classication.................................................. 46
Numeric Thread Size – Model 4087 ......................................................... 47
Fractional Thread Size – Model 4087....................................................... 48
Metric Thread Size – Model 4087............................................................. 50
Custom Thread Percentage (NOT AVAILABLE ON MODEL 4086) ........................... 51
WIRE SIZES AND 3-WIRE MEASUREMENTS
(NOT AVAILABLE ON MODEL 4086) ........................................................................... 52
Wire Size................................................................................................... 52
3-Wire Measurement – Known Thread Size and Wire Size..................... 52
Pitch Diameter – Known 3-Wire Measurement and Wire Size................. 53
BOLT PATTERN .......................................................................................... 54
Bolt Pattern – Model 4086 ........................................................................ 55
Bolt Pattern – Model 4087 ........................................................................ 56
RIGHT TRIANGLE FUNCTIONS (NOT AVAILABLE ON MODEL 4086) ..................... 57
Right Triangle – Based on Adjacent and Opposite Legs.......................... 57
Right Triangle – Based on Hypotenuse and Angle................................... 58
CIRCLE CALCULATIONS........................................................................... 59
Circumference and Area – Based on Diameter........................................ 59
Circumference and Area – Based on Radius
(NOT AVAILABLE ON MODEL 4086) ........................................................................ 59
BASIC D:M:S AND TRIGONOMETRY EXAMPLES................................... 59
Converting Degrees:Minutes:Seconds ..................................................... 59
Time Calculations Using D:M:S ................................................................ 60
Trigonometric Functions (NOT AVAILABLE ON MODEL 4086) ................................ 60
APPENDIX A – DEFAULT SETTINGS .......................................................... 62
APPENDIX B – PREFERENCE SETTINGS.................................................. 63
APPENDIX C – CARE INSTRUCTIONS........................................................ 66
APPENDIX D – ACCURACY/ERRORS, AUTO
SHUT-OFF, BATTERIES, RESET ................................................................. 66
REPAIR AND RETURN.................................................................................. 68
WARRANTY ................................................................................................... 69

Us e r 'sGU i d e — 5
GETTING STARTED
You may want to practice getting a feel for your calculator keys by
reading through the key denitions 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.
gr
Memory Clear (M-R/C) — Clears Accumulative Memory
without changing current display.
M
Accumulative Memory — Adds displayed value to
Accumulative Memory.
gM
M- — Subtracts displayed value from Accumulative
Memory.

6 — Ma c h i n i s t ca l c ™/ Ma c h i n i s t ca l c ™Pr o
Dimensional Function Keys
m
Millimeters — Identies 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.
g5 Centimeters (cm)
— Identies entry as
centimeters, with repeated presses toggling
between linear, area and volume units.
g9 Meters (m)
— Identies entry as meters, with repeat-
ed presses toggling between linear, area and volume
units.
g7 Feet
—Identies entry as Feet, with repeated press-
es of g 7 toggling between linear, area and volume
units. Also used with iand / for entering Feet-Inch
values. Repeated presses of g 7 during conversions
toggle between fractional Feet-Inch and decimal Feet.
iInch
— Identies 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.,
9i1/2). 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.
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.

Us e r 'sGU i d e — 7
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 (NOT AVAILABLE ON MODEL 4086)
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.
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.
(cont'd)

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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.
gD
Model 4086
g%
Model 4087
x2— Squares the value on the display.
A
Model 4087
only
Backspace Function — Used to delete entries one
keystroke at a time (unlike the
O
function, which
deletes the entire entry).
g %
Model 4086
gA
Model 4087
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 π (3.1415927).
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.
(cont'd)

Us e r 'sGU i d e — 9
gS Preference Settings (Prefs)
—Accesses various
customizable settings, such as dimensional answer
formats (see Preference Settings section).
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.
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
Model 4087
only
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 maximum Three-Wire
Measurement and Pitch Diameter given entered
Thread Size and Wire Size, as long as the selected
Thread Classication is set to an External thread
type. If a Three-Wire Measurement value is entered,
the Pitch Diameter calculation is based on this
entered measurement.
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. If all of these
values are entered, the calculation based on Cutting
Feed and RPM takes precedence.
(cont'd)