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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
Standard 40:1 ratio assumed
Full Rotations
—
Extra Holes
—
Material Cut-Off
ROUND
Total to Remove
—
Per Side
—
Tolerance Range
Max to Remove
—
Min to Remove
—
Max Per Side
—
Min Per Side
—
Speed & Feed
RPM
Calculated RPM
—
RPM = (SFM × 3.82) / Diameter
Gear Ratio
SIMPLE
Gear Ratio
—
Gear Ratio
COMPOUND + RPM
Ratio
—
Output RPM
—
Bore Displacement
ENGINE
Displacement (CI)
—
Liters
—
CI ↔ Liters
CONVERT
Liters
—
Cubic Inches
—
Engine CFM
CARB SIZING
Recommended CFM
—
CFM = (Displacement × RPM) / VE / 3456
Taper
TPF / TPI
Taper/Foot (TPF)
—
Taper/Inch (TPI)
—
Temperature
°C / °F
Fahrenheit
—
Celsius
—
MM ↔ Inch
CONVERT
Inches
—
Millimeters
—
Fraction ↔ Decimal
TO 64THS
Fraction → Decimal
Decimal (inches)
—
Decimal → Nearest 64th
Nearest Fraction
—
Exact Decimal of Nearest
—
Trigonometry
SIN / COS / TAN
sin(angle)
—
cos(angle)
—
tan(angle°)
—
Radians
—
Result
—
Result
—
Circumference
CIRCLE / ARC
Circumference (in)
—
Diameter (in)
—
Radius (in)
—
Arc Length
Arc Length (in)
—
Arc = (π × Diameter × Angle) / 360
Bolt Thread Data
METRIC / IMPERIAL
Geometric approximations for 60° threads — for guidance only.
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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Manuals
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