Collets in milling machines are generally used to

Milling is a process that uses a rotary motion to cut away material. The milling tool must have a high rotational speed to achieve a clean finish.  Here are some types of milling: Face milling: The cutting tool is perpendicular to the surface of the material. Face milling cutters are used to create flat surfaces and contours. Angular milling: A cutting tool is used at an angle to mill flat surfaces. Gang milling: Multiple surfaces of a workpiece are milled simultaneously by feeding the table against multiple cutters. Peripheral milling: A round tool's circumference is used. Peripheral... Show more

Milling is a process that uses a rotary motion to cut away material. The milling tool must have a high rotational speed to achieve a clean finish. 

Here are some types of milling:
Face milling: The cutting tool is perpendicular to the surface of the material. Face milling cutters are used to create flat surfaces and contours.
Angular milling: A cutting tool is used at an angle to mill flat surfaces.
Gang milling: Multiple surfaces of a workpiece are milled simultaneously by feeding the table against multiple cutters.
Peripheral milling: A round tool's circumference is used. Peripheral milling can be used in slabbing, profile milling, slotting, straddle milling, and slitting operations.
Slot milling: A rotating cutting tool is used to remove material from a workpiece by moving it in and out of a slot. This type of milling is typically used to create keyways, slots, or pockets.
Conventional milling: The spindle rotation vector cuts in the opposite direction of the cut. The tool rotates to cut the workpiece from smaller thickness to larger thickness. 

Other types of milling include:
Cam milling: Uses a universal dividing head in a vertical configuration to produce cams.
Gear milling: Cuts toothed gears into a round workpiece. 

Topics include: Milling Cutters, Milling Attachment, Milling Operations, Milling Methods, & Indexing by Milling.

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