There are two ways to feed the direction of the workpiece and the direction of rotation of the cutter:

Shun milling, reverse milling
The first is the smooth milling, the direction of rotation of the milling cutter and the cutting direction of the cutting are the same, at the beginning of cutting the cutter to bite the workpiece and cut the final chip.
The second is the reverse milling, the direction of rotation of the milling cutter and the direction of the cutting of the cutting are reversed. The milling cutter must slide on the workpiece before starting the cutting, starting with the cutting thickness of zero and cutting at the end of the cutting maximum.
In the three blade cutter, some milling or face milling, the cutting force in different directions. Milling, the cutter is just outside the workpiece, the direction of the cutting force should pay special attention. When the milling is done, the cutting force presses the workpiece against the table, and the cutting force causes the workpiece to leave the work table.
As the cutting effect of the best milling, usually preferred milling, only when the machine has a thread gap problem or can not solve the problem of milling, only consider the reverse milling.

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