Why do you always burn drills?
The drill is so small, but the depth is very shallow, so this speed can be, the knife can be calculated in accordance with the formula, appropriate to adjust the actual situation of cutting. I believe it will help you.
If it's made of stainless steel, there's also a drill, a cobalt white drill, which I've often used, though expensive, but super durable. If the ordinary drill, the speed of 500 to 800 minutes, on the high burning.A class of white steel line, color grinding when not, point to be around 118, as high temperature resistant. The speed is about 1000.
Do not add cutting fluid is difficult to control, do not burn, there is no way to use compressed air blowing it will be better, and drill down when the knife properly, will be better.
If it is ordinary A3 steel, then the domestic drill on the line, online search can buy, if at any cost, material and hard, import it.
