HEIDENHAIN TNC 360 User Manual - Manual (Page 225)

12-15 TNC 360
12 Tables, Overviews, Diagrams
12.4 Diagrams for Machining
Spindle speed S
The spindle speed S can be calculated from the tool radius R and the
cutting speed v as follows:
S =
Units:
S in rpm
V in mm/min
R in mm
You can read the spindle speed directly from the diagram.
Example:
Tool radius
R = 15 mm
Cutting speed V = 50000 mm/min
Spindle speed S ≈ 500 rpm
(calculated S = 530 rpm)
Tool radius
R [mm]
Cutting velocity
V [m/min]
V
2 . R . π