← all tools
Manual Lathe — Pass Calculator

From Rough.
To Finish Pass.

Set your starting and target diameter and depth of cut to get a full pass plan from rough to finish. Hit "pass taken." after each cut to move to the next.

mm

Current outer diameter of your workpiece

mm

Finished diameter you're aiming for

mm

On diameter (÷2 = on radius)

Rough passes
mm ⌀

On diameter — set half this on your cross slide

mm ⌀

Switch to approach passes this close to target


Approach passes
mm ⌀
mm ⌀

Calculated from finish passes × removal


Finish passes
mm ⌀
passes
Total passes
passes
Rough
passes
Approach
passes
Finish
passes
Pass Plan
Material remaining — diameter scale
Target Start OD
Manual Lathe — Pass Calculator
Remove ⌀
mm diameter
Set cross slide
mm on dial
OD after
mm