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MACHINIST WORKBOOK /// v3.6

Calculators

Speed & Feed

Inventory

CNC Ref

Manuals

Calculators

// ENTER VALUES IN YELLOW — RESULTS IN ORANGE

Dividing Head

INDEX

Desired Divisions

Holes on Index Plate

Standard 40:1 ratio assumed

Full Rotations

—

Extra Holes

—

Material Cut-Off

ROUND

Starting Diameter (in)

Desired Diameter (in)

Upper Limit (+)

Lower Limit (-)

Total to Remove

—

Per Side

—

Tolerance Range

Max to Remove

—

Min to Remove

—

Max Per Side

—

Min Per Side

—

Speed & Feed

RPM

SFM (Surface Feet/Min)

Diameter (in)

Calculated RPM

—

RPM = (SFM × 3.82) / Diameter

Gear Ratio

SIMPLE

Pinion Teeth

Ring Gear Teeth

Gear Ratio

—

Gear Ratio

COMPOUND + RPM

Input Gear Teeth

Output Gear Teeth

Input Speed (RPM)

Ratio

—

Output RPM

—

Bore Displacement

ENGINE

Bore Size (in)

Stroke Length (in)

Number of Cylinders

Displacement (CI)

—

Liters

—

CI ↔ Liters

CONVERT

Cubic Inches → Liters

Liters

—

Liters → Cubic Inches

Cubic Inches

—

Engine CFM

CARB SIZING

Displacement (CI)

Maximum RPM

Volumetric Efficiency (e.g. 0.85)

Recommended CFM

—

CFM = (Displacement × RPM) / VE / 3456

Taper

TPF / TPI

Large Diameter D (in)

Small Diameter d (in)

Length (in)

Taper/Foot (TPF)

—

Taper/Inch (TPI)

—

Temperature

°C / °F

Celsius → Fahrenheit

Fahrenheit

—

Fahrenheit → Celsius

Celsius

—

MM ↔ Inch

CONVERT

Millimeters → Inches

Inches

—

Inches → Millimeters

Millimeters

—

Fraction ↔ Decimal

TO 64THS

Fraction → Decimal

Select Fraction

Decimal (inches)

—

Decimal → Nearest 64th

Enter Decimal (inches)

Nearest Fraction

—

Exact Decimal of Nearest

—

Trigonometry

SIN / COS / TAN

Angle (rad) → Sin

sin(angle)

—

Angle (rad) → Cos

cos(angle)

—

Angle (deg) → Tan

tan(angle°)

—

Degrees → Radians

Radians

—

Base (Xⁿ)

Exponent (n)

Result

—

√ Square Root of

Result

—

Circumference

CIRCLE / ARC

Diameter (in) → Circumference

Circumference (in)

—

Circumference (in) → Diameter

Diameter (in)

—

Radius (in)

—

Arc Length

Diameter (in)

Angle (degrees)

Arc Length (in)

—

Arc = (π × Diameter × Angle) / 360

Bolt Thread Data

METRIC / IMPERIAL

Metric (ISO) Imperial (UNC/UNF)

Nominal Diameter

Pitch (mm)

Geometric approximations for 60° threads — for guidance only.

Percentage

CHANGE / DIFF / ERROR

Value A (from)

Value B (to)

Percent Change

—

Raw Difference (B − A)

—

Change = (B − A) / A × 100

Speed & Feed

// SFM REFERENCE — HSS & CARBIDE TOOLING

Turning

SFM

Material	Designation	HSS	Carbide

Milling

SFM

Material	Designation	HSS

Drilling & Reaming

SFM

Material	Designation	Drilling	Reaming

Inventory

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CNC Reference

// G-CODE LIBRARY — MILL / LATHE / GRINDER / TEMPLATES

Dialect:

// SELECT A COMMAND

Dialect:

// SELECT A COMMAND

Dialect:

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Manuals

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