Collet Arbors | McMaster-Carr

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33 Products

Quick-Change Tool Holders for Milling Machines

After installing the R8 body in the milling machine spindle, tool holders can be switched out in seconds. To remove a tool holder, depress the brass locking button and rotate the collar on the R8 body. When a new tool holder is inserted, a spring-loaded pin snaps the collar back into the locked position.

Collet Holder

Head		For Collet
Lg.	Dia.	Type	Max. Size	Material		Each
1 9/16"	63/64"	ER-16	3/8"	Steel	0000000	0000000
1 15/16"	1 31/32"	ER-32	3/4"	Steel	0000000	000000

Collet Chucks

R8 Taper

CAT 40 Taper

Securely hold collets in the spindle of a milling machine.

Use a nut wrench (sold separately) to tighten the chuck nut and secure the tool bit in the collet.

For technical drawings and 3-D models, click on a part number.

Collet Chucks					Nut Wrenches		Replacement Nuts
For Collet Type	Projection	Material		Each		Each		Each
R8 Taper
ER-16	1"	Steel	0000000	0000000	00000000	000000	00000000	000000
ER-20	2"	Steel	0000000	000000	0000000	00000	00000000	00000
CAT 40 Taper
100-TG	2 3/4"	Steel	00000000	000000	00000000	00000	00000000	00000
100-TG	3 1/2"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-11	2 1/2"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-11	6"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-16	2 1/4"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-16	3 1/2"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-20	2 1/2"	Steel	0000000	000000	0000000	00000	00000000	00000
ER-25	2 1/2"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-25	6"	Steel	00000000	000000	00000000	00000	00000000	00000
ER-32	3/4"	Steel	00000000	000000	000000	00	00000000	00000
ER-32	3 1/8"	Steel	0000000	000000	0000000	00000	00000000	00000
ER-32	5"	Steel	00000000	000000	0000000	00000	00000000	00000
ER-32	9"	Steel	00000000	000000	0000000	00000	00000000	00000