HEIDENHAIN TNC 360 ISO Programming - Manual (Page 214)

11-15 TNC 360
11 Tables, Overviews, Diagrams
11.4 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 m/min
R in mm
You can read the spindle speed directly from the diagram.
Example:
Tool radius
R = 15 mm
Cutting speed V = 50 m/min
Spindle speed S ≈ 500 rpm
(calculated S = 497 rpm)
Tool radius
R [mm]
Cutting velocity
V [m/min]
V
2 . R . π