5/8" Shaft Diameter Torque Limiters

Filter by

System of Measurement

Shaft Diameter

Shaft Type

Maximum Torque

Less than 1,000 in·lbf

1,000 in·lbf to 1,999 in·lbf

2,000 in·lbf to 2,999 in·lbf

Torque

0 in·lbf to 300 in·lbf

0 in·lbf to 600 in·lbf

0.5 in·lbf to 10.6 in·lbf

1 in·lbf to 25 in·lbf

2 in·lbf to 50 in·lbf

3 in·lbf to 70 in·lbf

80 in·ozf to 800 in·ozf

7.5 in·lbf to 75 in·lbf

13 in·lbf

25 in·lbf

2.5 ft·lbf

30 in·lbf to 300 in·lbf

36 in·lbf

40 in·lbf to 150 in·lbf

50 in·lbf

5 ft·lbf to 35 ft·lbf

Construction

Engagement Type

Drive Type

Maximum Rotation Speed

For Shaft Misalignment Type

Thread Size

Material

Torque Adjustment Mechanism

Drive Direction

Clockwise and Counterclockwise

Shaft Mount Type

Overall Length

Length

DFARS Specialty Metals

Exempt

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Compliant with Exemptions

REACH

Keyway Width

Rotation Speed

1,000 rpm to 1,999 rpm

2,000 rpm to 3,999 rpm

4,000 rpm to 5,999 rpm

Performance

80 Products

Noncontact Magnetic Torque Limiters

Using magnetic force instead of friction to transmit torque, these torque limiters won't wear when they slip. Because there's no wear, they give you accurate, repeatable action. Also known as hysteresis clutches, use them to brake, control tension, and prevent torque overload. They are designed to slip during a torque overload while still transmitting the set torque. For example, you can use them to maintain a constant tension while winding and unwinding wire. All are through-shaft torque limiters, so they regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear. Twist the adjustment ring to set the torque limit, then lock the ring into place with the included set screw.

Through Shaft

	Max. Rotation Speed, rpm	OD	Overall Lg.	Drive Direction	Shaft Mount Type	Mounting Hole Thread Size	For Shaft Dia.		Each
For Round Shafts



	0.5 to 10.6	220	3 5/16"	2 1/2"	Clockwise and Counterclockwise	Set Screw	M5 × 0.8 mm	5/8"	7220K5	0000000


	1 to 25	250	4 11/16"	3 1/8"	Clockwise and Counterclockwise	Set Screw	M5 × 0.8 mm	5/8"	7220K6	000000
	2 to 50	200	5 1/4"	3 1/8"	Clockwise and Counterclockwise	Set Screw	M5 × 0.8 mm	5/8"	7220K7	000000
	3 to 70	200	6 5/16"	4 1/8"	Clockwise and Counterclockwise	Set Screw	1/4"-20	5/8"	7220K8	00000000

Friction Torque Limiters

Use friction to prevent torque overload, control tension, and brake. These torque limiters slip when there’s too much torque while still transmitting the set torque. For example, they could be used in a machine that tightens a bottle cap to a certain torque without overtightening and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance. They have an adjustment ring, so you can set the torque limit by hand without removing them from your shaft. Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.

Shaft-to-Shaft

Image of Product. Front orientation. Torque Limiters. Friction Torque Limiters.

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

	Torque, in·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Drive Direction	Shaft Mount Type		Each
For Round Shafts



	5/8"	5 to 50	50	1 5/8"	2 1/2"	Clockwise and Counterclockwise	Set Screw	9132K21	0000000


	5/8"	7.5 to 75	50	2 1/4"	2 1/2"	Clockwise and Counterclockwise	Set Screw	9132K25	000000

Through Shaft

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

	Torque, in·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Drive Direction	Shaft Mount Type	Mounting Hole Thread Size		Each
For Round Shafts



	5/8"	5 to 50	50	1 5/8"	2 1/2"	Clockwise and Counterclockwise	Set Screw	6-32	9132K36	0000000


	5/8"	7.5 to 75	50	2 1/4"	2 1/2"	Clockwise and Counterclockwise	Set Screw	8-32	9132K38	000000

Chain and Belt Torque Limiters


Torque Limiter Shown with Sprocket		Replacement Friction Lining

Prevent damage from overloading. When overloaded, these limiters cause your sprocket or pulley to slip. Once the overload is removed, the limiters automatically reset. Set the torque within the range listed. Friction lining is between the hub and pressure plate.

Double Spring—Double-spring limiters have a second spring for handling nearly twice the torque of single-spring limiters.

Sprockets—Sprockets are designed specifically to fit their corresponding limiters. These hubless sprockets are not interchangeable.

	Torque Limiters												Sprockets			Replacement Friction Lining
				Keyway				Torque, ft·lbf
	For Shaft Dia.	OD	Overall Wd.	Wd.	Dp.	For Max. Sprocket or Pulley Wd.	Friction Lining Thk.	Min.	Max.	Hub Material		Each	Choose a Roller Chain Trade Number		Each		Each
Single Spring



		5/8"	2 1/4"	2"	3/16"	3/32"	1/2"	1/8"	5	35	Steel	6524K19	0000000	35, 40, 41, 50	6525K11	000000	6525K62	000000


		5/8"	2 1/2"	1 3/4"	3/16"	3/32"	11/32"	1/8"	25	60	Steel	6524K122	00000	35, 40, 41, 50	6525K12	00000	6525K64	0000
		5/8"	3 3/8"	2 1/8"	3/16"	3/32"	1/2"	1/8"	11	100	Steel	6524K27	000000	35, 40, 41, 50	6525K13	00000	6525K63	00000


		Double Spring



				5/8"	2 1/4"	2"	3/16"	3/32"	15/32"	1/8"	7	50	Steel	6524K24	000000	35, 40, 41, 50	6525K11	00000	6525K62	00000


				5/8"	2 1/2"	1 3/4"	3/16"	3/32"	11/32"	1/8"	30	95	Steel	6524K422	000000	35, 40, 41, 50	6525K12	00000	6525K64	0000
				5/8"	3 3/8"	2 1/8"	3/16"	3/32"	7/16"	1/8"	13	175	Steel	6524K432	000000	35, 40, 41, 50	6525K13	00000	6525K63	00000

Replacements for Chain and Belt Torque Limiters

	For Roller Chain Trade No.
For 2 1/2" OD


35	6525K804	00000
40, 50	6525K805	0000
41	6525K806	0000

For OD		Each
2 1/2"	6525K801	00000

Precision Overload-Protection Spring-Loaded Torque Limiters

With zero backlash (no play), there’s no motion lost when these torque limiters transfer torque, so machines move smoothly with accurate and repeatable motion. They protect your machinery if there is a jam, emergency stop, or other overload by cutting off torque when a maximum torque is reached. They automatically resume transmitting torque once it drops below the set maximum. When they resume, they start transmitting torque from the same position where they stopped, keeping your drive and output sides in sync. They should not be used in applications that frequently exceed the set torque. You can adjust the set torque by using a spanner wrench to twist the adjustment ring.

To help you detect an overload, they have a sensor ring that moves out of place when these limiters cut off torque. Use a sensor (not included) to trigger an alarm or a shutdown when the ring moves.

They clamp evenly around your shaft for more holding power than set screws and won't damage your shaft.

Shaft-to-Shaft

Shaft-to-Shaft Torque

Limiter, Spider, and

Hub Shown Assembled


	Hubs

Hubs

Shaft-to-shaft torque limiters also act as a flexible shaft coupling, so they compensate for angular and parallel misalignment as they regulate torque transmission between shafts. This reduces vibration and protects components from wear. For a complete unit, you’ll need a torque limiter, a hub, and a spider (all sold separately).

	Torque Limiters													Hubs			Spiders
					Keyway													Misalignment Capability
	For Shaft Dia.	Torque, in·lbf	OD	Overall Lg.	Wd.	Dp.	Material	Drive Direction	Shaft Mount Type	Re-Engagement Position	Features		Each	Choose a Shaft Diameter		Each	Max. Rotation Speed, rpm	Parallel	Angular	Temp. Range, ° F		Each
For Keyed Shafts



		5/8"	90 to 220	2 9/16"	3 3/8"	3/16"	3/32"	Steel	Clockwise and Counterclockwise	Clamp On	Single	Sensor Ring, Zero Backlash	4404N16	0000000	1/2", 5/8", 3/4"	4404N27	000000	9,000	0.011"	1°	0 to 180	9939T14	000000


		5/8"	225 to 705	2 7/8"	3 13/16"	3/16"	3/32"	Steel	Clockwise and Counterclockwise	Clamp On	Single	Sensor Ring, Zero Backlash	4404N18	000000	1/2", 5/8", 3/4", 1", 1 1/4"	4404N28	000000	8,000	0.011"	1°	0 to 180	9939T17	00000

Through Shaft

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

						Keyway
	For Shaft Dia.	Torque, in·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Wd.	Dp.	Material	Drive Direction	Shaft Mount Type	Re-Engagement Position	Features		Each
For Keyed Shafts



		5/8"	90 to 265	6,000	2 9/16"	2"	3/16"	3/32"	Steel	Clockwise and Counterclockwise	Clamp On	Single	Sensor Ring, Zero Backlash	4404N37	0000000


		5/8"	180 to 615	4,000	3 5/8"	2 5/16"	3/16"	3/32"	Steel	Clockwise and Counterclockwise	Clamp On	Single	Sensor Ring, Zero Backlash	4404N41	000000

Overload-Protection Spring-Loaded Torque Limiters

Protect your machinery if there is a jam, emergency stop, or other overload by cutting off torque between shafts when a maximum torque is reached. These torque limiters automatically resume transmitting torque once it drops below the set maximum. They should not be used in applications that frequently exceed the maximum torque. Since they come factory-set to a maximum torque, there’s no adjustment required and no risk of unintended changes to the torque setting.

They act as a flexible shaft coupling, so they reduce vibration and protect components from wear by compensating for angular and parallel misalignment. Fasten to your shafts by tightening the set screws, which bite into each shaft to hold it.

			Misalignment Capability
For Shaft Dia.	For Shaft Type	Max. Rotation Speed, rpm	Parallel	Angular	OD	Overall Lg.	Keyway Wd. × Keyway Dp.	Material	Center Material	Drive Direction	Re-Engagement Position	Choose a Maximum Torque, in·lbf		Each
5/8"	Keyed	1,800	0.031"	6°	3 1/2"	3"	3/16" × 3/32"	6061 Aluminum	Steel	Clockwise and Counterclockwise	Multiple	25, 50, 75, 100, 125	6609K12	0000000

Torque Limiter Sensor Rings


Torque Limiter with Sensor Ring Installed

Sensor rings help you detect an overload by moving only when the limiter is transmitting torque. Use a sensor (not included) to trigger an alarm or shut down when the ring stops moving.

Material	OD	Thk.		Each
Steel	3 1/2"	0.06"	6609K1	000000

High-Torque Friction Torque Limiters

With rugged roller chains, these torque limiters handle more torque than other torque limiters. They have a disc that creates friction to prevent torque overload, control tension, and brake. If there’s too much torque, they’ll slip and only transmit the set torque. For example, they could be used in a machine that tightens a bottle cap to a certain torque without overtightening and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance. You can adjust the torque by rotating the hex nut on the hub.

They act as a flexible shaft coupling, so they reduce vibration and protect components from wear by compensating for angular and parallel misalignment. Fasten them to your shafts by tightening the set screws, which bite into each shaft to hold it.

Shaft-to-Shaft

Single Spring—Single-spring torque limiters let you make finer torque adjustments than double-spring torque limiters but can only withstand half as much torque.

Double Spring—Double-spring torque limiters handle twice as much torque as single-spring torque limiters but are not the best for making precise adjustments at low torques.

					Misalignment Capability							Roller Chain
	For Shaft Dia.	For Shaft Type	Torque, ft·lbf	Max. Rotation Speed, rpm	Parallel	Angular	OD	Overall Lg.	Keyway Wd. × Keyway Dp.	Drive Direction	Shaft Mount Type	Standard	Trade No.		Each
Single Spring



		1/2" × 5/8"	Round × Keyed	0 to 25	1,800	0.01"	3°	2 3/4"	2 1/4"	3/16" × 3/32"	Clockwise and Counterclockwise	Set Screw	ANSI	35-2	4782N113	0000000


		5/8" × 5/8"	Keyed × Keyed	0 to 25	1,800	0.01"	3°	2 3/4"	2 1/4"	3/16" × 3/32" 3/16" × 3/32"	Clockwise and Counterclockwise	Set Screw	ANSI	35-2	4782N117	000000
		5/8" × 3/4"	Keyed × Keyed	0 to 25	1,800	0.01"	3°	2 3/4"	2 1/4"	3/16" × 3/32" 3/16" × 3/32"	Clockwise and Counterclockwise	Set Screw	ANSI	35-2	4782N119	000000


		Double Spring



				1/2" × 5/8"	Round × Keyed	0 to 50	1,800	0.01"	3°	2 3/4"	2 1/4"	3/16" × 3/32"	Clockwise and Counterclockwise	Set Screw	ANSI	35-2	4782N114	000000


				5/8" × 5/8"	Keyed × Keyed	0 to 50	1,800	0.01"	3°	2 3/4"	2 1/4"	3/16" × 3/32" 3/16" × 3/32"	Clockwise and Counterclockwise	Set Screw	ANSI	35-2	4782N118	000000
				5/8" × 3/4"	Keyed × Keyed	0 to 50	1,800	0.01"	3°	2 3/4"	2 1/4"	3/16" × 3/32" 3/16" × 3/32"	Clockwise and Counterclockwise	Set Screw	ANSI	35-2	4782N121	000000

Remote-Adjust Air-Powered Friction Torque Limiters

Use your air system to remotely make changes to the torque setting or cut off torque completely, even during operation. Adjust the torque setting by adjusting the air pressure—the higher the pressure, the higher the set torque. When these torque limiters exceed their set torque, they’ll slip but still transmit the set torque. They use friction to prevent torque overload, control tension, and brake. They’re often used in automated systems. For instance, they can be used in a machine that tightens a bottle cap to a certain torque without overtightening it and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance.

Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.

Shaft-to-Shaft

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

							Keyway				Air Inlet
	For Shaft Dia.	Torque, in·lbf	Max. Pressure, psi	Max. Rotation Speed	OD	Overall Lg.	Wd.	Dp.	Drive Direction	Shaft Mount Type	Thread Size	Thread Type	Gender		Each
For Round Shafts



		5/8"	30 to 300	100	Not Rated	2 3/4"	3 5/8"	—	—	Clockwise and Counterclockwise	Set Screw	10-32	UNF	Female	9133K19	0000000


		For Keyed Shafts



				5/8"	30 to 300	100	Not Rated	2 3/4"	3 5/8"	3/16"	3/32"	Clockwise and Counterclockwise	Set Screw	10-32	UNF	Female	9133K54	000000

Through Shaft

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

							Keyway					Air Inlet
	For Shaft Dia.	Torque, in·lbf	Max. Pressure, psi	Max. Rotation Speed	OD	Overall Lg.	Wd.	Dp.	Drive Direction	Shaft Mount Type	Mounting Hole Thread Size	Thread Size	Thread Type	Gender		Each
For Keyed Shafts



		5/8"	30 to 300	100	Not Rated	2 3/4"	3 5/8"	3/16"	3/32"	Clockwise and Counterclockwise	Set Screw	8-32	10-32	UNF	Female	9133K44	0000000

Corrosion-Resistant Overload-Protection Spring-Loaded Torque Limiters

Prevent corrosion from interfering with these torque limiters’ ability to protect your machinery if there’s a jam, emergency stop, or other overload. Made of nylon, they won’t rust or corrode from moisture, salt, and oil. They cut off torque when they reach the set maximum torque and automatically resume transmitting torque once it drops below the set maximum. They should not be used in applications that frequently exceed the set torque. You can adjust the set torque by tightening the hex head screw on the housing.

To help you detect an overload, these torque limiters have a sensor ring that moves out of place when these limiters cut off torque. Use a sensor (not included) to trigger an alarm or a shutdown when the ring moves.

Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.

Shaft-to-Shaft

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

				Misalignment Capability				Keyway
	For Shaft Dia.	Torque, in·lbf	Max. Rotation Speed, rpm	Parallel	Angular	OD	Overall Lg.	Wd.	Dp.	No. of Springs	Material	Drive Direction	Shaft Mount Type	Re-Engagement Position	Features		Each
For Keyed Shafts



		5/8"	40 to 150	1,800	0.01"	1°	4 1/32"	3 7/16"	3/16"	3/32"	6	Nylon	Clockwise and Counterclockwise	Set Screw	Multiple	Sensor Ring	4410N105	0000000

Spring Kits

Image of Product. Front orientation. Exploded view. Compression Springs. Corrosion-Resistant Overload-Protection Spring-Loaded Torque Limiters .

Spring kits let you change the torque range on your torque limiter.

For OD	No. of Springs	Torque, in·lbf	Material		Each
4 1/32"	6	140 to 350	Stainless Steel	4410N118	000000
4 1/32"	6	300 to 500	Stainless Steel	4410N119	00000

Through Shaft

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

						Keyway
	For Shaft Dia.	Torque, in·lbf	Max. Rotation Speed, rpm	OD	Overall Lg.	Wd.	Dp.	No. of Springs	Material	Drive Direction	Shaft Mount Type	Re-Engagement Position	Features		Each
For Keyed Shafts



		5/8"	40 to 150	1,800	4 1/32"	3 7/16"	3/16"	3/32"	6	Nylon	Clockwise and Counterclockwise	Set Screw	Multiple	Sensor Ring	4410N113	0000000

Spring Kits

Spring kits let you change the torque range on your torque limiter.

For OD	No. of Springs	Torque, in·lbf	Material		Each
4 1/32"	6	140 to 350	Stainless Steel	4410N118	000000
4 1/32"	6	300 to 500	Stainless Steel	4410N119	00000

Flexible-Shaft Shear Couplings

To protect power-transmission components from damage, these couplings will shear or tear in overtorque conditions (approximately 10-20 times the maximum rated torque) to sever connections between shafts. They have a flexible center that not only compensates for misalignment, but also dampens vibration and shock loads. Couplings have no metal-on-metal contact, reducing noise and eliminating the need for lubrication. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.

			Misalignment Capability
For Shaft Diameter	Max. Torque, in·lbf	Max. Rotation Speed, rpm	Parallel	Angular	OD	Overall Lg.	Material	Center Material	Temp. Range, ° F	Torque-Limiting Direction		Each
3/8" × 5/8"	13	10,000	0.031"	2°	1 3/8"	2 1/4"	Steel	Neoprene	-30 to 212	Clockwise and Counterclockwise	6410K59	000000
1/2" × 5/8"	13	10,000	0.031"	2°	1 3/8"	2 1/4"	Steel	Neoprene	-30 to 212	Clockwise and Counterclockwise	6410K61	000000
5/8" × 5/8"	30	10,000	0.031"	2°	1 13/16"	2 11/16"	Steel	Neoprene	-30 to 212	Clockwise and Counterclockwise	6410K46	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	4402N111	0000000


		Shaft-to-Shaft with Support Rollers



				5/8"	Keyed	1,100	7.5	1,750	—	—	—	—	3 63/64"	3 19/64"	3/16" × 3/32"	Steel	Set Screw	4402N122	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	4402N141	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	4402N151	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)	4402N11	000000

Electric Clutch/Brakes for Face-Mount Motors


Controller	Clutch/Brake

From one assembly, electrically control when to transmit power with a clutch and when to hold a load in place with a brake. The clutch and brake each have their own circuit, so they can be controlled separately. To disengage either one, remove power to its circuit. Disengaging the clutch disconnects the load from your motor, stopping power transmission without stopping your motor. Disengaging the brake releases it.

These clutch/brakes have a mounting pattern that is designed to mount directly to your NEMA face-mount motor. Fasten them to your motor's shaft by tightening the set screws, which bite into your shaft for a tight hold. To the other side, attach a gearbox or couple a gear, sprocket, pulley, or other component.

Controllers (sold separately) convert an AC input into two DC outputs that alternate engaging the clutch and the brake. If their green LED is lit, the clutch has power. If their red LED is lit, the brake has power. Mount these controllers inside a conduit box (sold separately).

	Max. Rotation Speed, rpm	Voltage, V DC	For Motor Frame Size	OD	Overall Lg.	Material	Drive Direction	Shaft Dia.	Keyway Width × Keyway Depth	Electrical Connection Type	Wire Lead Lg.	Certification		Each
Through Shaft



	3/4	3,600	90	NEMA 48Y, NEMA 56C	6 3/4"	6 3/4"	Steel	Clockwise and Counterclockwise	5/8"	3/16" × 3/16"	Hardwire	36"	UL Listed, C-UL Listed	61355K31	000000000


	3	3,600	90	NEMA 48Y, NEMA 56C	6 3/4"	6 3/4"	Steel	Clockwise and Counterclockwise	5/8"	3/16" × 3/16"	Hardwire	36"	UL Listed, C-UL Listed	61355K32	00000000

Accessories for Clutch/Brakes

Input	Output
120	50/60	90	0.8	5 1/2"	-20 to 110	UL Listed, C-UL Listed	4417N11	0000000

Conduit Boxes

Image of Product. Front orientation. Electrical Enclosures. Electric Clutch/Brakes for Face-Mount Motors.

Conduit boxes attach directly to these clutch/brakes to protect wiring from dust and moisture.

No. of Knockouts	Knockout Trade Size	Lg.	Wd.	Ht.	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	4406N103	000000

Covers

Covers change the open design of these clutch/brakes into a totally enclosed fan-cooled unit, protecting them from dust and moisture.

Material	Includes		Each
Steel	Two Covers, Two Gaskets, Four Mounting Screws	4406N104	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—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



		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"	4550N14	0000000

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"	4550N32	000000000	4550N31	000000000

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	4406N101	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	4406N102	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	4406N105	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	4406N103	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	4406N104	000000

Base/Face-Mount AC Brake Motors

When these motors lose power, a brake engages to hold your equipment’s position, unlike standard AC motors. They’re often used with conveyors to keep items in place after a power loss, and with hoists to stop them from dropping a load. Mount them from the base or face. Rated for continuous duty, these motors can run equipment that never turns off. Their shaft is keyed, and they come with key stock.

Totally Enclosed Fan-Cooled (TEFC) Motor Enclosure—These motors have a TEFC (totally enclosed fan-cooled) enclosure that protects better than an ODP (open dripproof) enclosure. They aren’t airtight, but they can be used in dirty, dusty, and wet environments. To keep the motor cool, the enclosure has an external fan that blows air over the outside of the motor.

						Overall			Shaft					Insulation
	Power, hp	Max. Rotation Speed, rpm	Full Load Current	Inverter Rated	Motor Enclosure Type	Lg.	Wd.	Ht.	Dia.	Lg.	Ctr. to Base	Type	Base Type	Class	Max. Temp., ° F	Enclosure Rating		Each
230V AC/460V AC, Three Phase







				NEMA 56C

				3/4	1,720	2.8 amp/1.4 amp	No	Totally Enclosed Fan-Cooled (TEFC)	15 1/4"	8 3/4"	7 1/4"	5/8"	1 7/8"	3 1/2"	Keyed	Welded	B	266	IP43	4954N11	000000000


				1	1,760	3.2 amp/1.6 amp	Yes	Totally Enclosed Fan-Cooled (TEFC)	17 1/4"	8 7/8"	7 1/4"	5/8"	1 7/8"	3 1/2"	Keyed	Welded	F	311	IP43	4954N12	00000000

Base-Mount AC Brake Motors

Unlike standard AC motors, these motors have an integrated brake that activates after a power loss to hold your equipment in place. They’re often used with conveyors to stop them from moving backwards after a power loss, and with hoists to prevent them from dropping a load. Mount their base to flat surfaces. Rated for continuous duty, these motors can run equipment that never turns off. Their shaft is keyed, and they come with key stock.

						Overall			Shaft					Insulation
	Power, hp	Max. Rotation Speed, rpm	Full Load Current	Inverter Rated	Motor Enclosure Type	Lg.	Wd.	Ht.	Dia.	Lg.	Ctr. to Base	Type	Base Type	Class	Max. Temp., ° F	Enclosure Rating		Each
230V AC/460V AC, Three Phase







				NEMA 56

				3/4	1,720	2.8 amp/1.4 amp	No	Totally Enclosed Fan-Cooled (TEFC)	15 1/4"	9 1/8"	7 1/4"	5/8"	1 7/8"	3 1/2"	Keyed	Welded	B	266	IP43	4952N11	000000000


				1	1,760	3.2 amp/1.6 amp	Yes	Totally Enclosed Fan-Cooled (TEFC)	17 1/4"	9 1/8"	7 1/4"	5/8"	1 7/8"	3 1/2"	Keyed	Welded	B	266	IP43	4952N12	00000000

Face-Mount AC Brake Motors

A built-in brake engages to hold your equipment in place when these motors lose power, unlike standard AC motors. These motors are often used with conveyors to keep items in place after a power loss, and with hoists to prevent them from dropping a load. Also known as C-face motors, these bolt directly to your equipment. They’re rated for continuous duty, so they can run equipment that never turns off. Their shaft is keyed, and they come with a key stock.

Totally Enclosed Fan-Cooled (TEFC) Motor Enclosure—These motors have a TEFC (totally enclosed fan-cooled) enclosure that protects better than an ODP (open dripproof) enclosure. They’re not airtight, but they can be used in dirty, wet, and dusty environments. To keep the motor cool, the enclosure has an external fan that blows air over the outside of the motor.

						Overall			Shaft				Insulation
	Power, hp	Max. Rotation Speed, rpm	Full Load Current	Inverter Rated	Motor Enclosure Type	Lg.	Wd.	Ht.	Dia.	Lg.	Ctr. to Base	Type	Class	Max. Temp., ° F	Enclosure Rating		Each
230V AC/460V AC, Three Phase







				NEMA 56C

				3/4	1,720	2.8 amp/1.4 amp	No	Totally Enclosed Fan-Cooled (TEFC)	15 3/8"	8 7/8"	7 1/4"	5/8"	1 7/8"	3 1/2"	Keyed	B	266	IP54	4876N11	000000000


				1	1,760	3.2 amp/1.6 amp	Yes	Totally Enclosed Fan-Cooled (TEFC)	17 1/4"	8 7/8"	7 1/4"	5/8"	1 7/8"	3 1/2"	Keyed	F	311	IP43	4876N12	00000000