4.2 of drill bit, drill bit, old broken... Material (aluminum bar).. please help me, how to do it will do well
Lathe or drilling machine, with coolant, it should be very good, ah, more than a few back.
The main reason is that the chip removal is not timely! The speed should not be too high, the force should not be too fierce, to drill, retire frequently, not because it is aluminum, that can be hard to drill, and hard to drill, one is to fold the drill bit, and the other is the Kong Zuanpian
The main reason is that the chip removal is not timely! The speed should not be too high, the force should not be too fierce, to drill, retire frequently, not because it is aluminum, that can be hard to drill, and hard to drill, one is to fold the drill bit, and the other is the Kong Zuanpian
