Milling calculator

Calculate speeds and feeds for milling bits.

Tool diameter (mm)

Number of flutes (integer)

Surface speed (m/min)

Chip load (mm)

Spindle speed (RPM) Feed XY (mm/min) Feed Z or plunge (mm/min) Stepover (mm) Stepdown (mm)

Personal experience

There are some settings that worked well for me.

Code	Diameter	Flutes	Material	Link
`EHC570020`	2mm	2	HSS, coated	Cutwel
`EHC570040`	4mm	2	HSS, coated	Cutwel

Legend:

Tool	$V_s$	$L$	$v$	$V_f$	Verdict
`EHC570040`	~38.1	0.025	3032	152	Perfect (slow)
`EHC570040`	~38.1	0.05	3032	303	Perfect (medium)
`EHC570040`	~38.1	0.075	3032	450	Perfect (fast)
`EHC570020`	25	0.02	3979	159	Light melting on slot cuts