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Description
iMachinist is a 100% free machining/engineering calculator. It includes popular machining formulas used by modern cnc programmers with basic conversions and shop math.

Basic calcs included:
Mill:
RPM
SFM
IPM
High feed
ID helical interpolation
OD helical interpolation
Step over
Effective diameter
Radial chip thinning
Axial chip thinning

Lathe:
RPM
SFM
IPR

Threads:
CNC Tapping
Tap drill in.
Tap drill MM.
Form tap drill in.
Form tap drill MM.
Drill point length
Spot drill chamfer

Shop math:
Sine bar
MRR
Trig Calc
Hex from flats

Conversions:
In to MM
Inch feed to mm
ft lb to...