Chip-breaking machining where the hole is drilled with a tool that allows the chips to be evacuated by the coolant via an external channel. Beskrivning The process The drilling head usually has only one cutting edge [1] and the cutting fluid is supplied to the cutting zone of a channel [2] within the drill head. To permit long, straight holes the drill is often supported by a control unit [3] placed near the entrance. While the drill works, a coolant is pumped through the channels of the drill tube at high pressure which transports the chips via an outer axial channel [4]. Cutting fluid Cutting fluid has three main purposes. Cooling, lubrication and removal of chips. Read more Gun drilling Process films Advantages and disadvantages In comparison with alternative methods Very deep holes can be drilled Good surface finish Holes can be produced with an interference expensive tools
