What is calculated?
Cutting speed and current diameter set spindle speed. For longitudinal turning, removal rate is approximately cutting speed times feed times depth of cut.
Equations
n = 1000vc/(πd)
vf = n·f
Qw = vc·f·ap
Manufacturing · preliminary design
Turning data and cutting time
Determine speed, feed, cutting time and removal rate for one longitudinal turning pass.
IJ 5
02
Results
Enter values and run the calculation.
Application and limits
Set a lathe, estimate cycle time and compare removal rates.
One pass at constant diameter; no CSS control, power or tool-life calculation.
Frequently asked questions
Which diameter applies to facing?
Diameter changes continuously; this constant-diameter calculator is only approximate for facing.
Is ap radial or diametral?
ap is radial depth of cut; diameter reduction is 2ap.
Technical basis
Dubbel, manufacturing processes, turning; DIN 6580/6584 terminology (local source, 2026-09-09).
The source supports the equation structure; this calculator does not claim a complete standards verification.