	・	Double taper expansion collets are standard form as expansion collets for inside diameter clamping type. It is made to be expanded by drawing the central part of the collet with a drawbar, and clamp a workpiece.
	・	These collets open in parallel since there are flexing slots from both sides of front and back.
	・	According to the form of these collets, a little more clamping range in a free state can be taken.

	・	Single taper expansion collets are used for primary processing, such as NC lathe, in many cases.
	・	It is made to be expanded by drawing the central part of the collet with drawbar, and clamp a workpiece.
	・	These collets open in parallel since there are flexing slots from both sides of front and back.
	・	High precision is expectable as compared with double taper expansion collets.

	・	These are expansion collets with flange. It is made to be expanded by drawing the central part of the collet with a drawbar, and clamp a workpiece.
	・	These collets may not open in parallel in case of the specification that the bore of the collet is opened widely in a free state since one side of the collet is a flange.
	・	It’s easy to insert a workpiece since more clamping range in a free state can be taken.

	・	Expansion disk is used for the gear cutting machine along with the tan line collets, and is indispensable to processing of differential gear of cars.
	・	Expansion disk has the structure faces two plates together face to face and makes an outside diameter extend by compressing, and clamp a workpiece.

Workholding collets (Inside diameter holding type)