cutting a hole in a stainless steel sink ? | Screwfix Commun ..
The cutting speed is an important factor to avoid work hardening, subsequent blunting of the cutter then blueing etc as things then start getting hot.. Generally recomendations are about 50ft/min.. A 2" hole saw has a circumference of about 6" as the crow flies.. That means a maximum speed of about 100 RPM..