Electromagnetic Clutches

Filter by

Shaft Diameter

Clutch Type

Shaft Type

Maximum Torque

25 ft·lbf to 99 ft·lbf

100 ft·lbf to 249 ft·lbf

250 ft·lbf to 999 ft·lbf

1,000 ft·lbf or greater

Drive Direction

Clockwise

Clockwise and Counterclockwise

Clockwise or Counterclockwise

Maximum Power

Shaft Mount Type

For Shaft Misalignment Type

Voltage

Torque

25 ft·lbf to 99 ft·lbf

100 ft·lbf to 249 ft·lbf

250 ft·lbf to 999 ft·lbf

1,000 ft·lbf or greater

Rotation Speed

Less than 1,000 rpm

1,000 rpm to 1,499 rpm

1,500 rpm to 1,799 rpm

1,800 rpm to 1,999 rpm

2,000 rpm or greater

Drive Type

Shaft-to-Shaft

Through Shaft

Maximum Rotation Speed

Engagement Type

Keyway Width

Power

Overall Length

RoHS

Keyway Depth

Length

REACH

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Shaft Coupling Flexibility

Current

65 Products

Electric One-Way Clutches

Unlike mechanical clutches, these clutches let you electrically control when torque is transmitted. They transfer torque in one direction and spin freely in the opposite direction, so they’re useful in applications where you don’t want motion to reverse such as in backstopping, indexing, and overrunning. When you remove power from these clutches, they disengage, cutting torque to your pulley, sprocket, gear, or other mounted component without stopping your drive shaft.

Friction Engagement

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

												Clockwise Drive			Counterclockwise Drive
	For Shaft Dia.	For Shaft Type	Max. Torque, in·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Electric Clutch Type	Electrical Connection Type	Shaft Mount Type	Wire Lead Lg.	Voltage, V DC	Current, amp		Each	Current, amp		Each
Through Shaft



		1/4"	Round	30	1,400	1 1/4"	1 1/8"	Power On	Hardwire	Spring Pin	15"	24	0.14	0000000	0000000	0.24	0000000	0000000


		5/16"	Round	30	1,400	1 1/4"	1 1/8"	Power On	Hardwire	Spring Pin	15"	24	0.14	0000000	000000	0.24	0000000	000000
		3/8"	Round	75	1,400	1 3/4"	1 1/2"	Power On	Hardwire	Spring Pin	18"	24	0.14	0000000	000000	0.24	0000000	000000
		1/2"	Round	75	1,400	1 3/4"	1 1/2"	Power On	Hardwire	Spring Pin	18"	24	0.14	0000000	000000	0.24	0000000	000000

Soft-Start Centrifugal Clutches

Disengaged until they rotate fast enough to transmit torque, these clutches give the components on your driven side a smooth start by allowing the driving side to start without load.

Friction Engagement


Shaft-to-Shaft with Engagement Springs	Shaft-to-Shaft with Support Rollers	Through Shaft with Support Rollers and Pulley

Shaft-to-Shaft—Shaft-to-shaft clutches also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

Support Rollers—Clutches with support rollers are quieter and last longer than other centrifugal clutches because the contact points are supported by urethane rollers to prevent slipping.

With Pulley—Clutches with a pulley come ready to install a V-belt.

Set-Screw Shaft Mount—Clutches that mount to shafts with set screws bite into your shaft when tightened to hold it.

								Misalignment Capability							Clockwise-and-Counterclockwise Drive
	For Shaft Dia.	For Shaft Type	Engagement Speed, rpm	Max. Power, hp	Max. Rotation Speed, rpm	Pitch Dia.	For Belt Trade Size	Parallel	Angular	OD	Overall Lg.	Keyway Wd. × Keyway Dp.	Material	Shaft Mount Type		Each
Shaft-to-Shaft with Engagement Springs



		5/8"	Keyed	830	13	3,600	—	—	0.003"	0.25°	4 3/16"	2 1/2"	3/16" × 3/32"	Steel	Set Screw	00000000	0000000


		3/4"	Keyed	830	13	3,600	—	—	0.003"	0.25°	4 3/16"	2 1/2"	3/16" × 3/32"	Steel	Set Screw	00000000	000000
		1"	Keyed	830	13	3,600	—	—	0.003"	0.25°	4 3/16"	2 1/2"	1/4" × 1/8"	Steel	Set Screw	00000000	000000


		Shaft-to-Shaft with Support Rollers



				1/2"	Round	1,100	7.5	1,750	—	—	—	—	3 63/64"	3 19/64"	—	Steel	Set Screw	00000000	000000


				5/8"	Keyed	1,100	7.5	1,750	—	—	—	—	3 63/64"	3 19/64"	3/16" × 3/32"	Steel	Set Screw	00000000	000000
				3/4"	Keyed	1,100	7.5	1,750	—	—	—	—	3 63/64"	3 19/64"	3/16" × 3/32"	Steel	Set Screw	00000000	000000
				1"	Keyed	1,100	7.5	1,750	—	—	—	—	3 63/64"	3 17/64"	1/4" × 1/8"	Steel	Set Screw	00000000	000000


				Through Shaft with Support Rollers and Pulley



						5/8"	Keyed	1,100	7.5	1,750	2.8"	4L, A	—	—	3 63/64"	1 7/8"	3/16" × 3/32"	Steel	Set Screw	00000000	000000


						5/8"	Keyed	1,100	7.5	1,750	3.3"	4L, A	—	—	3 63/64"	1 7/8"	3/16" × 3/32"	Steel	Set Screw	00000000	000000
						3/4"	Keyed	1,100	7.5	1,750	2.8"	4L, A	—	—	3 63/64"	1 7/8"	3/16" × 3/32"	Steel	Set Screw	00000000	000000
						3/4"	Keyed	1,100	7.5	1,750	3.3"	4L, A	—	—	3 63/64"	1 7/8"	3/16" × 3/32"	Steel	Set Screw	00000000	000000

Clutch Engagement Springs

Clutch engagement springs allow you to change the speed at which the clutch engages.

Includes		Each
Four Green Springs (830 RPM Engagement), Four Red Springs (1200 RPM Engagement), Four Orange Springs (1800 RPM Engagement)	0000000	000000

One-Way Clutches

Since they transfer torque in one direction and spin freely in the other, these clutches are useful in applications where you don’t want motion to reverse, such as in backstopping, indexing, and overrunning. For example, they can be used to prevent a conveyor from reversing direction.

When choosing a clutch, consider how much torque you need to transfer. You should also consider how the clutch will attach to your mounted component.

Roller Engagement—Knurled Hub

Roller clutches are best for low- to medium-torque transfer in overrunning and indexing applications.

Clutches with a knurled hub can be press fit into the bore of your component.

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

Set-Screw Shaft Mount—Clutches that mount to shafts with set screws bite into your shaft when tightened to hold it.

								Shaft		Hub		Clockwise Drive		Counterclockwise Drive
	For Shaft Dia.	For Shaft Type	Max. Torque, ft·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Material	Keyway Wd. × Keyway Dp.	Mount Type	Dia.	Lg.		Each		Each
Through Shaft



		1/4"	Round	0.83	5,000	15/16"	31/32"	Steel	—	Set Screw	5/8"	9/32"	0000000	0000000	0000000	0000000


		3/8"	Keyed	1.25	5,000	1 3/16"	1"	Steel	3/32" × 3/64"	Set Screw	9/16"	3/8"	0000000	000000	0000000	000000
		1/2"	Keyed	4.16	2,000	1 1/2"	1 9/32"	Steel	1/8" × 1/16"	Set Screw	7/8"	1/2"	0000000	000000	0000000	000000

Roller Engagement—Keyed Hub

Roller clutches are best for low- to medium-torque transfer in overrunning and indexing applications.

Clutches with a keyed hub let you slip on your component.

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

Slip-Fit Shaft Mount—Clutches that mount to shafts with a slip fit must be secured with a shaft collar or in some other way that prevents them from moving along the length of your shaft.

								Shaft		Hub			Clockwise Drive
	For Shaft Dia.	For Shaft Type	Max. Torque, ft·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Material	Keyway Wd. × Keyway Dp.	Mount Type	Dia.	Lg.	Keyway Wd. × Keyway Dp.		Each
Through Shaft



		1/4"	Keyed	5	1,800	1 5/8"	1 15/16"	Steel	1/16" × 1/32"	Slip Fit	7/8"	13/16"	3/16" × 3/32"	0000000	0000000


		3/8"	Keyed	14	1,800	2"	2 1/8"	Steel	3/32" × 3/64"	Slip Fit	1 1/4"	1"	3/16" × 3/32"	0000000	000000
		1/2"	Keyed	14	1,800	2"	2 1/8"	Steel	1/8" × 1/16"	Slip Fit	1 1/4"	1"	3/16" × 3/32"	0000000	000000
		5/8"	Keyed	28	1,500	2 5/8"	2 23/32"	Steel	3/16" × 3/32"	Slip Fit	1 3/8"	1 5/16"	3/16" × 3/32"	0000000	000000
		3/4"	Keyed	100	1,000	3 5/8"	3 11/32"	Steel	3/16" × 3/32"	Slip Fit	2 1/4"	1 1/2"	3/8" × 3/16"	0000000	000000
		1"	Keyed	100	1,000	3 5/8"	3 11/32"	Steel	1/4" × 1/8"	Slip Fit	2 1/4"	1 1/2"	3/8" × 3/16"	0000000	000000
		1 1/4"	Keyed	100	1,000	3 5/8"	3 11/32"	Steel	1/4" × 1/8"	Slip Fit	2 1/4"	1 1/2"	3/8" × 3/16"	0000000	000000
		1 1/2"	Keyed	200	800	4 1/2"	4 1/2"	Steel	3/8" × 3/16"	Slip Fit	3"	2 1/16"	3/8" × 3/16"	0000000	000000

Sprag Engagement—Keyed Hub

Sprag clutches handle higher torque than roller clutches because they have more contact points. This makes them best for backstopping applications.

Clutches with a keyed hub let you slip on your component.

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

Set-Screw Shaft Mount—Clutches that mount to shafts with set screws bite into your shaft when tightened to hold it.

				Max. Rotation Speed, rpm					Shaft		Hub			Clockwise Drive		Counterclockwise Drive
	For Shaft Dia.	For Shaft Type	Max. Torque, ft·lbf	Inner-Race	Outer-Race	OD	Overall Lg.	Material	Keyway Wd. × Keyway Dp.	Mount Type	Dia.	Lg.	Keyway Wd. × Keyway Dp.		Each		Each
Through Shaft



		5/8"	Keyed	110	1,950	900	2"	2 3/4"	Steel	3/16" × 3/32"	Set Screw	1 1/4"	1"	3/16" × 3/32"	0000000	000000000	0000000	000000000


		3/4"	Keyed	300	1,950	750	2.88"	3.19"	Steel	3/16" × 3/32"	Set Screw	1 3/8"	1 5/16"	3/16" × 3/32"	0000000	00000000	0000000	00000000
		1"	Keyed	450	1,650	600	3 1/4"	3.56"	Steel	1/4" × 1/8"	Set Screw	1 3/4"	1 7/16"	1/4" × 1/8"	0000000	00000000	0000000	00000000
		1 1/4"	Keyed	675	1,250	350	3 3/4"	3 1/2"	Steel	5/16" × 5/32"	Set Screw	2 1/4"	1 7/16"	5/16" × 5/32"	0000000	00000000	0000000	00000000

Sprag Engagement—Flush Hub


	Covers


Torque Arm Shown Installed	Torque Arms

Sprag clutches handle higher torque than roller clutches because they have more contact points. This makes them best for backstopping applications.

Clutches with a flush hub have a precision ground outer race, so they can be press fit directly into a component and positioned anywhere along the length of your shaft. They also have mounting holes on their face you can use to secure your component or an anti-rotation device, such as a torque arm, for a different backstopping setup.

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

Slip-Fit Shaft Mount—Clutches that mount to shafts with a slip fit must be secured with a shaft collar or in some other way that prevents them from moving along the length of your shaft.

Covers—Covers protect you from rotating equipment when the clutch is mounted to the end of the shaft.

Torque Arms—Clutch torque arms work as an anchor for clutches in backstopping applications. Mount to the outer race of your clutch and a stationary piece of equipment.

	Clutches												Covers		Torque Arms
				Max. Rotation Speed, rpm					Shaft		Clockwise or Counterclockwise Drive
	For Shaft Dia.	For Shaft Type	Max. Torque, ft·lbf	Inner-Race	Outer-Race	OD	Overall Lg.	Material	Keyway Wd. × Keyway Dp.	Mount Type		Each		Each		Each
Through Shaft



		3/4"	Keyed	300	2,800	850	3 1/2"	2 3/4"	Steel	3/16" × 3/32"	Slip Fit	0000000	000000000	00000000	0000000	00000000	0000000


		1"	Keyed	1,175	2,500	800	4 1/4"	3 1/2"	Steel	1/4" × 1/8"	Slip Fit	0000000	00000000	00000000	000000	00000000	000000
		1 1/4"	Keyed	1,175	2,500	800	4 1/4"	3 1/2"	Steel	1/4" × 1/8"	Slip Fit	0000000	00000000	00000000	000000	00000000	000000
		1 1/2"	Keyed	2,250	2,200	750	5 3/8"	3 3/4"	Steel	3/8" × 3/16"	Slip Fit	0000000	00000000	00000000	000000	00000000	000000
		1 3/4"	Keyed	2,250	2,200	750	5 3/8"	3 3/4"	Steel	3/8" × 3/16"	Slip Fit	0000000	00000000	00000000	000000	00000000	000000

Electric Clutches for Face-Mount Motors

Designed to mount directly to a NEMA face-mount motor, these clutches let you electrically control when to transmit power without turning off your motor. When you remove power to these clutches, they stop power transmission by disconnecting your motor's load. To the other side, attach a gearbox or couple a gear, sprocket, pulley, or other component.

Friction Engagement

Through Shaft—Through-shaft clutches regulate torque transmission between an input shaft and a mounted component.

Set-Screw Shaft Mount—Clutches that mount to shafts with set screws bite into your shaft when tightened to hold it.

																Clockwise-and-Counterclockwise Drive
	Max. Torque, ft·lbf	Max. Power, hp	Max. Rotation Speed, rpm	For Motor Frame Size	OD	Overall Lg.	Electric Clutch Type	Electrical Connection Type	Shaft Dia.	Keyway Wd. × Keyway Dp.	Material	Shaft Mount Type	Wire Lead Lg.	Voltage, V DC	Certification	Current, amp		Each
Through Shaft



		16	3/4	3,600	NEMA 48Y, NEMA 56C	6 3/4"	6 3/4"	Power On	Hardwire	5/8"	3/16" × 3/16"	Steel	Set Screw	36"	90	UL Listed, C-UL Listed	0.20	00000000	000000000


		30	3	3,600	NEMA 48Y, NEMA 56C	6 3/4"	6 3/4"	Power On	Hardwire	5/8"	3/16" × 3/16"	Steel	Set Screw	36"	90	UL Listed, C-UL Listed	0.23	00000000	00000000

Accessories for Clutches

Controllers

Clutch controllers (sold separately) convert an AC input into a DC output to engage and disengage these clutches. They mount inside an electrical enclosure (sold separately).

Input		Output
Voltage, V AC	Frequency, Hz	Voltage, V DC	Current, amp	Wire Lead Lg.	Temp. Range, ° F	Certification		Each
120	50/60	90	0.8	5 1/2"	-20 to 110	UL Listed, C-UL Listed	00000000	0000000

Enclosures

Electrical enclosures (sold separately) attach directly to these clutches to protect wiring from dust and moisture.

No. of Knockouts	Knockout Trade Size	Lg.	Wd.	Ht.	Finish	Material	Enclosure Rating	Certification		Each
2	1/2	2 1/4"	3 1/4"	2 3/16"	Galvanized	Steel	NEMA 4	UL Listed, C-UL Listed	00000000	000000

Covers

Clutch covers (sold separately) change the open design of these clutches into a totally enclosed fan-cooled unit, protecting them from dust and moisture.

Material	Includes		Each
Steel	Four Mounting Screws, Two Covers, Two Gaskets	00000000	000000

Contactless Magnetic Electric Brakes

Create drag to slow or stop the motion of your drive system using magnetic force. Because torque is transmitted by magnetic force without contact, there is no wear, so these brakes give you accurate, repeatable braking. Also known as electric hysteresis brakes, they are often used in tensioning, holding, and stopping applications. The brake engages when the power is on and releases when it is off. The amount of electrical current determines the amount of torque that is applied by the brake. Use these brakes with a current-limiting transformer.

							Keyway							Mounting Hole
	Shaft Dia.	Max. Torque, in·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Shaft Type	Wd.	Dp.	Electric Brake Type	Drive Direction	Electrical Connection Type	Wire Lead Lg.	Voltage, V DC	Thread Size	Thread Pitch, mm		Each
Through Shaft



		0.118"	0.2	1,990	1 1/4"	1 5/8"	Round	—	—	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M2.5	0.45	0000000	0000000


		0.197"	0.8	1,200	1 13/16"	2"	D-Profile	—	—	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M2.5	0.45	0000000	000000
		0.197"	1.3	760	2"	2 1/8"	D-Profile	—	—	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M3	0.5	0000000	000000
		0.276"	3.5	570	2 3/8"	3"	D-Profile	—	—	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M4	0.7	0000000	000000
		0.394"	11	590	3 5/8"	4"	D-Profile	—	—	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M4	0.7	0000000	000000
		0.472"	19	500	4 7/16"	4 7/8"	Keyed	0.158"	0.098"	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M5	0.8	0000000	000000
		0.59"	32	420	5 7/16"	5 1/8"	Keyed	0.197"	0.124"	Power On	Clockwise and Counterclockwise	Hardwire	18"	24	M5	0.8	0000000	00000000