Why do drill holes burn on stainless steel plates? What's the best way to drill them?
The cutting fluid is made of concentrated emulsions. Commonly used stainless steel drills are: high cobalt bit (M35 bit, M42 bit), in which the M42 bit is the most cost-effective, and carbide drills are also available.
And the feed amount is greater than 0.15mm, so as not to cut the cold work hardening layer as much as possible. The cutting speed is as low as possible to reduce the cutting temperature.
Stainless steel is characterized by high toughness, easy to stick the knife, so requires higher hardness of the drill bit, surface finish is better, the drill tip angle than the ordinary drill (130--135 degrees). At the same time, cooling should be sufficient
