Conversion table: number of revolutions of the tool spindle rpm at a given cutting speed
The table is based on the formula v = d x Pi x n /1000, where d must be entered in mm.
If the formula is rearranged, the result is:
- n = v x 1000/dxPi
The cutting speed v should be 25 m/min. (see table cutting speed)
The diameter of the tool M 6 is 6 mm.
This results in the following:
- 25 x 1000 = 25000 ;
6 x 3,1415 = 18,84 ;
25000 / 18,84 = 1326,96 .
These are then the necessary revolutions of the machine at the cutting speed of 25 m/min.
You can download the tables here.