Cutting Speed, Feed and Depth of Cut in Drilling Operation

The cutting speed and feed in drilling, as in case of other machines, depends upon many factors like material to be cut, material of the tool, type of finish required, type of coolant used, capacity of machine and the tool life, etc. The amount of feed per revolution, usually varies between 0.05 mm to 0.38 mm for drills up to 25 mm dia.

Cutting Speed

Cutting Speed = π DN /1000 m/min

Where 

                  d = Drill dia in mm, and

                  N = Spindle speed in rpm.