Air-Powered Brakes | McMaster-Carr

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	Power Source Power Source

Air

Air Powered

	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

	Shaft Mount Type Shaft Mount Type

	Set Screw

	For Shaft Misalignment Type For Shaft Misalignment Type

	None

	Torque Adjustability Torque Adjustability

Adjustable

	Torque-Limiting Direction Torque-Limiting Direction

Clockwise and
Counterclockwise

	Overall Length Overall Length

	OD OD

1 1/4"

1 1/2"

2 3/4"

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

DFARS Specialty Metals
COTS-Exempt

	Construction Construction

	One Piece

	Torque-Limiting Mechanism Torque-Limiting Mechanism

Disengages

	Shaft Coupling Type Shaft Coupling Type

Rigid

	Maximum Pressure Maximum Pressure

100 psi

	Maximum Speed Maximum Speed

Not Rated

	Pulling Direction Pulling Direction

Horizontal

Incline

Vertical

	Mounting Hole Thread Size Mounting Hole Thread Size

4-40

6-32

8-32

	Fully Wound Capacity Fully Wound Capacity

500 lbs.

1,000 lbs.

1,200 lbs.

	Duty Cycle @ Maximum Capacity Duty Cycle @ Maximum Capacity

	For Maximum Rope Length For Maximum Rope Length

90 ft.

125 ft.

170 ft.

	Keyway Depth Keyway Depth

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19 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

Air-Powered Winches for Wire Rope—For Lifting

Because this winch runs on compressed air, it gives you a longer operating time than electric winches. It has an automatic brake that holds the load when the motor stops. To lift, mount winch above the load, or use winch with a pulley that’s mounted above the load. Enclosed gears offer protection from dirt and debris.

For wire rope, see Wire Rope with Hook for Winches.

Note: Capacity is highest for the first layer of rope (at least five wraps of rope on the winch) and decreases as each additional layer of rope is wound on the winch.

Warning: Never use to lift people or items over people.

												Inlet
Max. Cap., lbs.	Fully Wound Cap., lbs.	Min. Line Speed, fpm	For Max. Rope Lg., ft.	For Rope Dia.	O'all Wd.	O'all Lg.	O'all Ht.	Material	Rope with Hook Included	Air Hose Included	Air Consumption @ Pressure	Gender	Thread Type	Pipe Size	Features		Each
15 Minutes On, 45 Minutes Off
2,000	1,200	13	90	5/16"	8 7/8"	14 3/8"	15"	Aluminum, Steel	No	No	80 cfm @ 100 psi	Female	NPT	1/2	Reversible Pulling Directions	00000000	000000000

Heavy Duty Air-Powered Winches for Wire Rope—For Lifting

These winches operate longer and require shorter breaks than standard air-powered winches. Because they run on compressed air, they give you longer operating times than electric winches. They have an automatic brake that holds the load when the motor stops. To lift, mount winches above the load, or use winches with a pulley that’s mounted above the load. Enclosed gears offer protection from dirt and debris.

For wire rope, see Wire Rope with Hook for Winches.

Note: Capacity is highest for the first layer of rope (at least five wraps of rope on the winch) and decreases as each additional layer of rope is wound on the winch.

Warning: Never use to lift people or items over people.

												Inlet
Max. Cap., lbs.	Fully Wound Cap., lbs.	Min. Line Speed, fpm	For Max. Rope Lg., ft.	For Rope Dia.	O'all Wd.	O'all Lg.	O'all Ht.	Material	Rope with Hook Included	Air Hose Included	Air Consumption @ Pressure	Gender	Thread Type	Pipe Size	Features		Each
30 Minutes On, 10 Minutes Off
750	500	40	125	1/4"	14 3/4"	14 5/8"	11 7/8"	Aluminum, Steel	No	No	100 cfm @ 90 psi	Female	NPT	1/2	Reversible Pulling Directions	0000000	000000000
1,500	1,000	40	170	1/4"	17 1/2"	21 1/2"	12 1/2"	Aluminum, Steel	No	No	100 cfm @ 90 psi	Female	NPT	1/2	Reversible Pulling Directions	0000000	00000000