Air-Powered Brakes | McMaster-Carr

Clear All

	Power Source Power Source	Show

Air

	Power Source Power Source	Hide

Manual

Electric

Air

	System of Measurement System of Measurement

Inch

	For Shaft Diameter For Shaft Diameter

	For Shaft Type For Shaft Type

	Round
	Keyed

	Maximum Torque Maximum Torque

20 in.-lbs. @ 100 psi

50 in.-lbs. @ 100 psi

100 in.-lbs. @ 100 psi

300 in.-lbs. @ 100 psi

	Torque Adjustability Torque Adjustability

Adjustable

	Construction Construction

	One Piece

	Torque-Limiting Mechanism Torque-Limiting Mechanism

Disengages

	For Shaft Misalignment Type For Shaft Misalignment Type

	None

	Shaft Mount Type Shaft Mount Type

	Set Screw

	Maximum Speed Maximum Speed

Not Rated

	Overall Length Overall Length

2 1/2"

3 3/8"

3 5/8"

	Shaft Coupling Type Shaft Coupling Type

Rigid

	Maximum Pressure Maximum Pressure

100 psi

	Torque-Limiting Direction Torque-Limiting Direction

Clockwise and
Counterclockwise

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	OD OD

1 1/4"

1 1/2"

2 3/4"

	Mounting Hole Thread Size Mounting Hole Thread Size

4-40

6-32

8-32

	Keyway Depth Keyway Depth

	Keyway Width Keyway Width

16 Products

Air-Powered Torque-Limiting Shaft-to-Gear Couplings

For Round Shafts

For Keyed Shafts

Often used in automated systems, these couplings are both air actuated and remotely adjustable, so you can adjust the torque setting even during operation. In the event of excess torque, they slip to protect motors and drivetrains, and then resume driving once the load has been reduced.

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

						Keyway			Air Inlet
For Shaft Dia.	Max. Torque	Max. Pressure, psi	Max. Speed	OD	Overall Lg.	Wd.	Dp.	Torque-Limiting Direction	Thread Size	Thread Type	Gender	Mounting Hole Thread Size		Each
For Round Shafts
1/4"	20 in.-lbs. @ 100 psi	100	Not Rated	1 1/4"	2 1/2"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	4-40	0000000	0000000
3/8"	50 in.-lbs. @ 100 psi	100	Not Rated	1 1/2"	3 3/8"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	6-32	0000000	000000
1/2"	100 in.-lbs. @ 100 psi	100	Not Rated	2"	3 5/8"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	6-32	0000000	000000
5/8"	300 in.-lbs. @ 100 psi	100	Not Rated	2 3/4"	3 5/8"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	8-32	0000000	000000
For Keyed Shafts
1/4"	20 in.-lbs. @ 100 psi	100	Not Rated	1 1/4"	2 1/2"	1/16"	1/32"	Clockwise and Counterclockwise	10-32	UNF	Female	4-40	0000000	000000
3/8"	50 in.-lbs. @ 100 psi	100	Not Rated	1 1/2"	3 3/8"	3/32"	3/64"	Clockwise and Counterclockwise	10-32	UNF	Female	6-32	0000000	000000
1/2"	100 in.-lbs. @ 100 psi	100	Not Rated	2"	3 5/8"	1/8"	1/16"	Clockwise and Counterclockwise	10-32	UNF	Female	6-32	0000000	000000
5/8"	300 in.-lbs. @ 100 psi	100	Not Rated	2 3/4"	3 5/8"	3/16"	3/32"	Clockwise and Counterclockwise	10-32	UNF	Female	8-32	0000000	000000

Air-Powered Torque-Limiting Shaft Couplings

For Round Shafts

For Keyed Shafts

Often used in automated systems, these couplings are air actuated so you can adjust the torque during operation. In the event of excess torque, they slip to protect motors and drivetrains, and then resume driving once the load has been reduced. You can adjust the torque level without removing them from your shaft.

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

						Keyway			Air Inlet
For Shaft Dia.	Max. Torque	Max. Pressure, psi	Max. Speed	OD	Overall Lg.	Wd.	Dp.	Torque-Limiting Direction	Thread Size	Thread Type	Gender		Each
For Round Shafts
1/4"	20 in.-lbs. @ 100 psi	100	Not Rated	1 1/4"	2 1/2"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	0000000
3/8"	50 in.-lbs. @ 100 psi	100	Not Rated	1 1/2"	3 3/8"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000
1/2"	100 in.-lbs. @ 100 psi	100	Not Rated	2"	3 5/8"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000
5/8"	300 in.-lbs. @ 100 psi	100	Not Rated	2 3/4"	3 5/8"	__	__	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000
For Keyed Shafts
1/4"	20 in.-lbs. @ 100 psi	100	Not Rated	1 1/4"	2 1/2"	1/16"	1/32"	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000
3/8"	50 in.-lbs. @ 100 psi	100	Not Rated	1 1/2"	3 3/8"	3/32"	3/64"	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000
1/2"	100 in.-lbs. @ 100 psi	100	Not Rated	2"	3 5/8"	1/8"	1/16"	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000
5/8"	300 in.-lbs. @ 100 psi	100	Not Rated	2 3/4"	3 5/8"	3/16"	3/32"	Clockwise and Counterclockwise	10-32	UNF	Female	0000000	000000