Collet Bushings | McMaster-Carr

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Shaft Diameter

Bore Diameter

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Material

Shank Diameter

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For Use With

Grinders for Bits and Burs

Shape

Maximum Rotation Speed

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

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Compliant with Exemptions

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Rotation Speed

10,000 rpm to 19,999 rpm

20,000 rpm to 29,999 rpm

30,000 rpm to 59,999 rpm

60,000 rpm or greater

Inlet Pipe Size

Power

Speed Control Switch Type

Overall Length

For Holding

Hose ID

Exhaust Location

Duty Rating

94 Products

Bore Reducers

With Flange

Instead of replacing your shaft or keeping components, such as couplings, with various bore diameters on hand, these reducers adapt the bore of a component to a smaller size. Slide the reducer into the bore and use your component’s set screws or clamping mechanism to secure the shaft.

Flange—Reducers with a flange prevent you from inserting them too far into the bore.

			Flange, mm
For Bore Dia.	For Shaft Dia.	Lg.	OD	Thk.	Max. Rotation Speed, rpm	Max. Torque	Material	Features		Each
1/4"	1/8"	0.221"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	000000
1/4"	3/16"	0.221"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/4"	5 mm	0.221"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/2"	1/4"	0.449"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/2"	5/16"	0.449"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/2"	3/8"	0.449"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/2"	5 mm	0.42"	13.59	0.46	5,000	Not Rated	Aluminum	Flange	0000000	00000
1/2"	6 mm	0.449"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/2"	8 mm	0.449"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1/2"	10 mm	0.449"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
5/8"	1/2"	0.46"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
5/8"	10 mm	0.46"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
5/8"	12 mm	0.46"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
3/4"	3/8"	0.646"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
3/4"	1/2"	0.646"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
3/4"	5/8"	0.646"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
3/4"	12 mm	0.646"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
3/4"	16 mm	0.646"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
7/8"	5/8"	0.755"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
7/8"	3/4"	0.755"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1"	5/8"	0.773"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1"	3/4"	0.773"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1"	7/8"	0.773"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1"	20 mm	0.773"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1 1/4"	1"	0.793"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
1 1/4"	25 mm	0.793"	—	—	10,000	Not Rated	Stainless Steel	—	0000000	00000
10 mm	1/4"	0.32"	10.83	0.44	5,000	Not Rated	Aluminum	Flange	0000000	00000
16 mm	1/4"	0.52"	16.88	0.46	5,000	Not Rated	Aluminum	Flange	0000000	00000
16 mm	3/8"	0.52"	16.88	0.46	5,000	Not Rated	Aluminum	Flange	0000000	00000
16 mm	1/2"	0.52"	16.88	0.46	5,000	Not Rated	Aluminum	Flange	0000000	00000
20 mm	3/8"	0.79"	20.87	0.45	5,000	Not Rated	Aluminum	Flange	0000000	00000

Lathe Tool Holder Bushings for CNC Lathes

Increase the diameter of boring bars, drill bits, and other shank-style cutting tools to securely fit CNC lathe tool blocks. These bushings are machined and ground to precisely fit both tools and tool blocks for optimal performance. Made of hardened steel, they are durable and stand up to the strain of CNC machining. They’re Style C bushings, which means they have a slot in the side that clamps tools regardless of where tool-block set screws are located, making them compatible with all tool blocks.

				Tolerance					Slot
	For Shank Dia.	ID	Lg.	OD	ID	Tool Holder Bushing Style	Head OD	Head Thk.	Lg.	Wd.	Material	Fabrication	Hardness		Each
3/4" OD


		1/4"	1/4"	2"	-0.0005" to 0.0005"	0.0005" to 0.0012"	C	1"	9/32"	1 1/2"	3/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	000000
		3/8"	3/8"	2"	-0.0005" to 0.0005"	0.0005" to 0.0012"	C	1"	9/32"	1 1/2"	3/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
		1/2"	1/2"	2"	-0.0005" to 0.0005"	0.0005" to 0.0012"	C	1"	9/32"	1 1/2"	3/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000

		1" OD


				1/4"	1/4"	2 3/4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 7/32"	9/32"	2 3/8"	5/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
				5/16"	5/16"	2 3/4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 7/32"	9/32"	2 3/8"	5/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
				3/8"	3/8"	2 3/4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 7/32"	9/32"	2 3/8"	5/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
				1/2"	1/2"	2 3/4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 7/32"	9/32"	2 3/8"	5/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
				5/8"	5/8"	2 3/4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 7/32"	9/32"	2 3/8"	5/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
				3/4"	3/4"	2 3/4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 7/32"	9/32"	2 3/8"	5/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000

				1 1/2" OD


						3/8"	3/8"	3 3/8"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 3/4"	9/32"	3"	7/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
						1/2"	1/2"	3 3/8"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 3/4"	9/32"	3"	7/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
						5/8"	5/8"	3 3/8"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 3/4"	9/32"	3"	7/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
						3/4"	3/4"	3 3/8"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 3/4"	9/32"	3"	7/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
						1"	1"	3 3/8"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 3/4"	9/32"	3"	7/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000
						1 1/4"	1 1/4"	3 3/8"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	1 3/4"	9/32"	3"	7/8"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	00000

						2" OD


								1/2"	1/2"	4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	2 7/32"	5/16"	3 5/8"	1"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	000000
								5/8"	5/8"	4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	2 7/32"	5/16"	3 5/8"	1"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	000000
								3/4"	3/4"	4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	2 7/32"	5/16"	3 5/8"	1"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	000000
								1"	1"	4"	-0.0012" to -0.0005"	0.0005" to 0.0012"	C	2 7/32"	5/16"	3 5/8"	1"	Black-Oxide Alloy Steel	Heat Treated	Rockwell C48	0000000	000000

Collets for Air-Powered Bit and Bur Die Grinders

	Die Grinder Collets					1/4" to 1/8" Collet Reducer Bushings
	Collet Size	Mfr. Model No.	For Mfr. Model No.		Each		Each
For Chicago Pneumatic


		1/4"	C138727	CP860, CP872, CP876	0000000	000000	00000000	00000

		For Dotco


				1/4"	208	12L2082-01	00000000	00000	00000000	0000
				1/4"	308PT	12L1082-36	00000000	00000	00000000	0000

				For Ingersoll Rand


						1/4"	DG110-700-G4	G1H250RG4, G1H350RG4	0000000	00000	00000000	0000
						1/4"	G160HD-700-1/4	G2H180RG4, G2H250RG4, G2X250RG4	0000000	00000	00000000	0000

						For Rockford


								1/4"	R3420-04	R3420	0000000	00000	00000000	0000

								For Sioux Tools


										1/4"	SP66459	5053A, 5054A-19K	0000000	00000	00000000	0000

										For St. Louis Pneumatic


												1/4"	3063	SLP-83150	0000000	00000	00000000	0000

												For Universal Tool


														1/4"	892233	UT8728E	00000000	00000	00000000	0000

Medium Duty Air-Powered Straight Die Grinders for Bits and Burs


Style A	Style B

Style C

More durable than our light duty die grinders, these are designed for more frequent use. They have a lever lock to prevent accidental start-up.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

Style B—Style B die grinders have a light to illuminate what you're working on. The light uses self-generated power, so it doesn't require a separate power source.

2,800 rpm Maximum Rotation Speed—Die grinders with a maximum speed of 2,800 rpm work well in high torque applications.

Die Grinders																1/4" to 1/8" Collet Reducer Bushings		Replacement Inch Die Grinder Collets
						Inlet
Style	Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Speed Control Switch Type	Overall Lg.	Wt., lb.	Includes	Features		Each		Each		Each


	A	2,800	3/5	1/4"	4 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	8 1/2"	2	Collet, Collet Wrench	—	0000000	0000000	———	0	———	0
	A	24,000	1/2	1/4"	10.5 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	5 3/4"	1.25	Collet, Collet Wrench	—	0000000	000000	00000000	00000	0000000	000000
	B	20,000	1/2	1/4"	3 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	7 1/2"	1.5	Collet, Collet Wrench	Built-In Light	0000000	000000	———	0	———	0
	C	22,000	0.9	1/4"	5.5 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	12"	2.5	Collet, Collet Wrench	—	00000000	000000	00000000	0000	00000000	00000

Medium Duty Air-Powered Straight Die Grinder Kits for Bits and Burs

The lightweight, pencil-sized die grinder in these kits works at high speeds and is more durable than light duty die grinders, making it good for frequent use. These kits also include grinding bits and carbide burs.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

						Inlet
	Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Speed Control Switch Type	Overall Lg.	Includes		Each
Pencil Size


		56,000	2/5	1/8"	8 ft³/min @ 90 psi	Back	NPT	1/8	1/4"	Ring	5 1/2"	Medium Duty Die Grinder, Grinding Bits with 1/8" Shank (5), Carbide Burs with 1/8" Shank (5), Collet, Collet Wrench, Plastic Case	000000	0000000

Heavy Duty Air-Powered Straight Die Grinders for Bits and Burs


Style A	Style B

Style C	Style D

High-quality bearings ensure long spindle life, even when die grinders are used continuously.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

Styles A and B—Styles A and B have a lever lock to prevent accidental start-up.

Style C—Style C are high-speed, lightweight, pencil-sized tools.

Die Grinders																1/4" to 1/8" Collet Reducer Bushings		Replacement Inch Die Grinder Collets		Replacement Die Grinder Collet Guards
						Inlet			Speed Control
Style	Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Type	Switch Type	Overall Lg.	Wt., lb.	Includes		Each		Each		Each		Each


	A	25,000	1	1/4"	25 ft³/min @ 90 psi	Back	NPT	3/8	3/8"	—	Lever	13 1/8"	2.75	Collet, Collet Wrench	0000000	0000000	00000000	00000	0000000	000000	———	0
	B	18,000	3/5	1/4"	30 ft³/min @ 90 psi	Back	NPT	1/4	5/16"	—	Lever	6 7/8"	1.5	Collet, Collet Wrench	00000000	000000	00000000	0000	00000000	00000	00000000	000000
	B	18,000	1	1/4"	14 ft³/min @ 90 psi	Back	NPT	3/8	3/8"	—	Lever	8 3/8"	1.625	Collet, Collet Wrench	0000000	000000	00000000	0000	0000000	00000	———	0
	B	25,000	0.3	1/4"	16 ft³/min @ 90 psi	Back	NPT	1/4	1/4"	—	Lever	6"	0.75	Collet, Collet Wrench	00000000	000000	00000000	0000	00000000	00000	00000000	00000
	B	25,000	2/5	1/4"	20 ft³/min @ 90 psi	Front, Back	NPT	1/4	3/8"	—	Lever	6 1/8"	0.75	Collet, Collet Wrench	0000000	000000	00000000	0000	0000000	00000	———	0
	B	25,000	1	1/4"	25 ft³/min @ 90 psi	Back	NPT	3/8	3/8"	—	Lever	8 3/8"	1.625	Collet, Collet Wrench	0000000	000000	00000000	0000	0000000	00000	———	0
	B	35,000	2/5	1/4"	25 ft³/min @ 90 psi	Front, Back	NPT	1/4	3/8"	—	Lever	6 1/8"	0.75	Collet, Collet Wrench	0000000	000000	00000000	0000	0000000	00000	———	0
	C	60,000	1/10	1/8"	9 ft³/min @ 90 psi	Back	NPT	1/8	3/16"	Variable	Ring	5 7/8"	0.375	5-ft. Air Hose, Collet, Collet Wrench	0000000	000000	———	0	0000000	00000	0000000	00000
	D	35,000	1	3/32"	8 ft³/min @ 90 psi	Back	NPT	1/4	1/4"	Fixed	—	5 1/4"	0.78	Collet, Collet Wrench	00000000	000000	———	0	———	0	———	0

Medium Duty Air-Powered Angled Die Grinders for Bits and Burs


Style A	Style B

Style C	Style D

More durable than our light duty die grinders, these are designed for more frequent use. They have an angled head for accessing hard-to-reach places.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

Style A—Style A have a lever lock to prevent accidental start-up.

Style B—Style B grinders have a lever lock to prevent accidental start-up. They also have a 60° angled head to get into spots a right-angle grinder can't reach and a soft grip to reduce vibration.

Style D—Style D die grinders work at speeds up to 72,000 rpm. They’re lightweight and pencil-sized.

4,000 rpm Maximum Rotation Speed—Die grinders with a 4,000 rpm max. speed are for use in low-speed, high-torque applications.

Die Grinders																1/4" to 1/8" Collet Reducer Bushings
						Inlet
Style	Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Speed Control Switch Type	Head Angle	Overall Lg.	Wt., lb.	Includes		Each		Each


	A	4,000	0.4	1/4"	3 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	90°	7 1/4"	1.625	Collet Wrench	0000000	0000000	———	0
	A	20,000	0.33	1/4"	6 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	90°	7"	1.25	Collet, Collet Wrench	0000000	000000	00000000	00000
	A	25,000	0.3	1/4"	3 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	90°	6"	1.125	Collet, Collet Wrench	0000000	000000	00000000	0000
	B	18,000	0.5	1/4"	3.3 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	60°	7 3/4"	1.75	Collet, Collet Wrench	0000000	000000	00000000	0000
	C	18,000	0.6	1/4"	6 ft³/min @ 90 psi	Handle	NPT	1/4	3/8"	Trigger	90°	5 3/16"	1.85	Collet Wrench	0000000	000000	———	0
	D	72,000	0.4	1/8"	5 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Switch	95°	6 1/8"	0.49	Collet, Collet Wrench	0000000	000000	———	0

Light Duty Air-Powered Angled Die Grinders for Bits and Burs

Use these die grinders for occasional light grinding, deburring, and finishing.

Die grinders have an angled head for accessing hard-to-reach places and a lever lock to prevent accidental start-up.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

Die Grinders																1/4" to 1/8" Collet Reducer Bushings
						Inlet
Style	Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Speed Control Switch Type	Head Angle	Overall Lg.	Wt., lb.	Includes		Each		Each


	A	18,000	0.3	1/4"	4 ft³/min @ 90 psi	Back	NPT	1/4	3/8"	Lever	90°	6 1/8"	1.125	Collet, Collet Wrench	0000000	000000	00000000	00000
	A	21,000	1/4	1/4"	6 ft³/min @ 90 psi	Front	NPT	1/4	3/8"	Lever	90°	5 1/4"	1	Collet, Collet Wrench	0000000	00000	00000000	0000

Light Duty Air-Powered Angled Die Grinder Kits for Bits and Burs

Kit includes a light duty die grinder and an assortment of tools for occasional grinding, deburring, and finishing.

It has an angled head for accessing hard-to-reach places and a lever lock to prevent accidental start-up.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

Die Grinders														1/4" to 1/8" Collet Reducer Bushings
					Inlet
Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Speed Control Switch Type	Overall Lg.	Wt., lb.	Includes		Each		Each


	21,000	1/4	1/4"	6 ft³/min @ 90 psi	Front	NPT	1/4	3/8"	Lever	5 1/4"	1	Light Duty Die Grinder, 1/8" Shank Diameter Grinding Bits (5), 1/4" Shank Diameter Grinding Bits (5), 1/8" Collet, Wrenches (2), Plastic Case	0000000	0000000	00000000	00000

Heavy Duty Air-Powered Angled Die Grinders for Bits and Burs


Style A	Style B

Style C

With high-quality bearings and collets for long spindle life, these die grinders are rated for continuous use to take on tough jobs.

Die grinders have an angled head for accessing hard-to-reach places and a lever lock to prevent accidental start-up.

Caution: Use only accessories that have a greater rpm rating than the maximum speed of the die grinder you choose.

Style A—Style A have sealed bearings to minimize maintenance.

Style B—Style B have heavy duty gears and precision collets for smooth operation and long tool life; exhaust can be changed from rear to front.

Style C—Style C are high-speed, lightweight, pencil-sized tools.

Die Grinders																	1/4" to 1/8" Collet Reducer Bushings
						Inlet			Speed Control
Style	Max. Rotation Speed, rpm	Power, hp	For Shank Dia.	Airflow @ Pressure	Exhaust Location	Thread Type	Pipe Size	For Hose ID	Type	Switch Type	Head Angle	Overall Lg.	Wt., lb.	Includes		Each		Each


	A	12,000	2/5	1/4"	22 ft³/min @ 90 psi	Front	NPT	1/4	1/4"	—	Lever	90°	6 5/8"	1.125	Collet, Collet Wrench	00000000	0000000	00000000	00000
	A	20,000	2/5	1/4"	22 ft³/min @ 90 psi	Front	NPT	1/4	1/4"	—	Lever	90°	6 5/8"	1.125	Collet, Collet Wrench	00000000	000000	00000000	0000
	B	12,000	1	1/4"	17 ft³/min @ 90 psi	Front, Back	NPT	3/8	3/8"	—	Lever	90°	9"	3.5	Collet, Collet Wrench	0000000	000000	00000000	0000
	B	20,000	2/5	1/4"	25 ft³/min @ 90 psi	Front, Back	NPT	1/4	3/8"	—	Lever	90°	6"	1.125	Collet, Collet Wrench	0000000	000000	00000000	0000
	C	80,000	1/10	1/8"	9 ft³/min @ 90 psi	Back	NPT	1/8	3/16"	Variable	Ring	98°	5 1/2"	0.375	5-ft. Air Hose, Collet, Collet Wrench	0000000	000000	———	0