The main difference between a milling cutter and a drill bit is: the side edge of the milling cutter has a relief angle, so it can be cut sideways. The side edge of the drill bit has no relief angle, so it cannot be cut laterally and is used for axial drilling.
Milling cutter: It is a rotary cutter with one or more teeth used for milling. When working, each cutter tooth intermittently cuts off the margin of the workpiece. Milling cutters are mainly used for machining planes, steps, grooves, forming surfaces and cutting off workpieces on milling machines. In order to ensure that a sufficiently high average chip thickness/feed per tooth is used, the number of teeth of the milling cutter suitable for the process must be correctly determined.
It is roughly divided into:
1. Flat-end milling cutter, rough milling, remove a lot of blanks, small area horizontal plane or contour finish milling.
2. The ball end milling cutter can be used for semi-finishing and finishing milling of curved surfaces; the small ball end milling cutter can finish milling steep surfaces/small chamfers of straight walls and irregular contour surfaces.
3. The flat-end milling cutter has a chamfer, which can be used for rough milling to remove a large amount of blanks, and also for fine milling of small chamfers on the flat surface (relative to the steep surface).
4. Forming cutters, including chamfer cutters, T-shaped cutters or drum cutters, tooth cutters, and inner R cutters.
5. Chamfering cutter, the shape of the chamfering cutter is the same as the chamfering shape, and it is divided into milling cutters for round chamfering and oblique chamfering.
6. T-shaped milling cutter can mill T-slots.
7. Tooth type milling cutter, milling out various tooth types, such as gears.
8. Rough milling cutter, a rough milling cutter designed for cutting aluminum-copper alloys, can be processed quickly.
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