Page 233 - High Performance End Mills - Catalog 430

Note with regard to determining
rotational speed and feed speed
for Micro end mills

If the rotational speed n calculated with the
recommended cutting speed v c and the cutting
diameter d 1 exceeds the maximum spindle speed
n max , the effective feed speed vf must be calculated
with the maximum spindle speed n max !

Example

Calculation of spindle speed n

Cutting diameter d 1 : 0.2 mm
Cutting speed v c : 240 m/min
v c x 1000
n= _________ [rpm]
d 1 x

_________
n= 240 x 1000 [rpm]
0.2 x

Calculated spindle speed n: 381972 rpm

Maximum spindle speed n max : 42000 rpm

Calculation of effective feed speed v f
Spindle speed n max : 42000 rpm
Feed per tooth f z : 0.003 mm
Flutes Z: 2

v f = f z x Z x n [mm/min]

v f = 0.003 x 2 x 42000 [mm/min]

Effective feed speed v f : 252 mm/min