MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
the speed should be about one-half the speed recommended in the table.
carbide-tipped cutters are used, the speed can be doubled.
If a plentiful supply of cutting oil is applied to the milling
cutter and the workpiece, the speeds can be increased from 50 to 100
MILLING MACHINE CUTTING SPEEDS
FOR HIGH-SPEED STEEL MILLING CUTTERS.
For roughing cuts, a moderate speed and coarse feed give best
results; for finishing cuts, the best practice is to reverse these
conditions, using a higher speed and a lighter cut.
The formula for calculating spindle speed in revolutions per minute
is as follows:
Where, rpm = spindle speed (in revolution per minute)