About Ball and Roller Bearings
More
About Gears
More
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 torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.
Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
For technical drawings and 3-D models, click on a part number.
Torque, in.-lbs | Keyway | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Min. | Max. | Max. Speed, rpm | OD | Overall Lg. | Wd. | Dp. | Drive Direction | Mounting Hole Thread Size | Each | |
Shaft-to-Shaft | |||||||||||
For Round Shafts | |||||||||||
1/4" | 1.6 | 16 | 50 | 1" | 1 1/2" | __ | __ | Clockwise and Counterclockwise | __ | 0000000 | 0000000 |
For Keyed Shafts | |||||||||||
1/4" | 1.6 | 16 | 50 | 1" | 1 1/2" | 1/16" | 1/32" | Clockwise and Counterclockwise | __ | 0000000 | 000000 |
Through Shaft | |||||||||||
For Round Shafts | |||||||||||
1/4" | 1.6 | 16 | 50 | 1" | 1 1/2" | __ | __ | Clockwise and Counterclockwise | 4-40 | 0000000 | 000000 |
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.
For technical drawings and 3-D models, click on a part number.
Torque, in.-lbs | Mounting Hole | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Min. | Max. | Max. Speed, rpm | OD | Overall Lg. | Drive Direction | Shaft Mount Type | Thread Size | Thread Pitch, mm | For Shaft Dia. | Each | |
0.06 | 1.25 | 880 | 1 15/16" | 1 5/8" | Clockwise and Counterclockwise | Set Screw | M4 | 0.7 | 1/4" | 000000 | 0000000 |
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.
For Shaft Dia. | Max. Torque, in.-lbs. | Max. Speed, rpm | OD | Overall Lg. | Electric Clutch Type | Electrical Connection Type | Wire Lead Lg. | Voltage | Current | Each | |
Clockwise Drive Direction | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Through Shaft | |||||||||||
1/4" | 30 | 1,400 | 1 1/4" | 1 1/8" | Power On | Hardwire | 15" | 24V DC | 0.14A | 0000000 | 000000 |
Counterclockwise Drive Direction | |||||||||||
Through Shaft | |||||||||||
1/4" | 30 | 1,400 | 1 1/4" | 1 1/8" | Power On | Hardwire | 15" | 24V DC | 0.24A | 0000000 | 00000 |
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 torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.
Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
For technical drawings and 3-D models, click on a part number.
Torque | Air Inlet | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Min., in.-lbs. | Max., in.-lbs. | Max. Pressure, psi | Max. Speed | OD | Overall Lg. | Drive Direction | Thread Size | Thread Type | Gender | Each | |
Shaft-to-Shaft | ||||||||||||
For Round Shafts | ||||||||||||
1/4" | 2 | 20 | 100 | Not Rated | 1 1/4" | 2 1/2" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 0000000 |
Through Shaft | ||||||||||||
For Round Shafts | ||||||||||||
1/4" | 2 | 20 | 100 | Not Rated | 1 1/4" | 2 1/2" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 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. They’re through-shaft clutches, so they regulate torque transmission between a drive shaft and a mounted component such as a pulley, sprocket, or gear.
When choosing a clutch, consider how much torque you need to transfer. Roller clutches are best for low- to medium-torque transfer in overrunning and indexing applications.
You should also consider how the clutch will attach to your mounted component. Clutches with a knurled hub can be press fit into the bore of your component. Clutches with a keyed hub let you slip on your component.
Clutches that mount to shafts with set screws bite into your shaft when tightened to hold it. 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.
For technical drawings and 3-D models, click on a part number.
Shaft | Hub | Clockwise Drive Direction | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Max. Torque, ft.-lbs. | Max. Speed, rpm | OD | Overall Lg. | Material | Keyway Wd. × Keyway Dp. | Mount Type | Dia. | Lg. | Keyway Wd. × Keyway Dp. | Each | |
1/4" | 5 | 1,800 | 1 5/8" | 1 15/16" | Steel | 3/16" × 1/16" | Slip Fit | 7/8" | 13/16" | 3/16" × 3/32" | 0000000 | 0000000 |
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 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).
Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
For technical drawings and 3-D models, click on a part number.
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 torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.
Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.
Spring kits let you change the torque range on your torque limiter.
For technical drawings and 3-D models, click on a part number.
Torque | Misalignment Capability | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | For Shaft Type | Min., in.-lbs. | Max., in.-lbs. | Max. Speed, rpm | Parallel | Angular | OD | Overall Lg. | No. of Springs | Material | Drive Direction | Re-Engagement Position | Features | Each | |
Shaft-to-Shaft | |||||||||||||||
1/4" | Round | 4 | 60 | 1,800 | 0.01" | 1° | 2 1/2" | 2 1/2" | 4 | Nylon Plastic | Clockwise and Counterclockwise | Multiple Position | Sensor Ring | 00000000 | 0000000 |
Through Shaft | |||||||||||||||
1/4" | Round | 4 | 60 | 1,800 | __ | __ | 2 1/2" | 2 1/2" | 4 | Nylon Plastic | Clockwise and Counterclockwise | Multiple Position | Sensor Ring | 00000000 | 000000 |
Torque Limiters for Chain and Belt Drives
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 discs are between the hub and pressure plate.
Double-spring limiters have a second spring for handling nearly twice the torque of single-spring limiters.
Optional sprockets are designed specifically to fit their corresponding limiters. These hubless sprockets are not interchangeable.
For technical drawings and 3-D models, click on a part number.
Torque Limiters | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Keyway | Torque | Optional Sprockets | Replacement Friction Discs for Torque Limiters | |||||||||||||
For Shaft Dia. | OD | O'all Wd. | Wd. | Dp. | For Max. Sprocket or Pulley Wd. | Friction Disc Thick. | Min., ft.-lbs. | Max., ft.-lbs. | Hub Material | Each | For Roller Chain Trade Size | Each | Each | |||
Single Spring | ||||||||||||||||
1/4" | 1 5/16" | 1 3/8" | 1/16" | 1/32" | 11/32" | 1/8" | 1 | 6 | Steel | 00000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 | |
Double Spring | ||||||||||||||||
1/4" | 1 5/16" | 1 3/8" | 1/16" | 1/32" | 5/16" | 1/8" | 2 | 12 | Steel | 00000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 |
One-Way Locking Needle-Roller Bearing Clutches
The needles in these bearings roll freely in one direction, but lock to transmit torque when the rotation of the shaft is reversed. Also known as drawn-cup roller clutches. An arrow on the lip indicates the rotational direction that locks the bearings.
Single-row bearings do not support loads from any direction. To support radial loads, use with our Needle-Roller Bearings.
Bearings with 301 stainless steel springs handle higher temperatures than bearings with acetal springs.
For technical drawings and 3-D models, click on a part number.
For Shaft Dia. | For Housing ID | Wd. | Ring Material | Max. Speed, rpm | Max. Torque, ft.-lbs. | Lubrication | For Shaft Surface Smoothness (Ra), microinch | Temp. Range, °F | Each | |
Single Row | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Acetal Plastic Springs | ||||||||||
1/4" | 7/16" | 1/2" | Steel | 20,000 | 1.5 | Required | 16 | -20° to 200° | 0000000 | 000000 |
301 Stainless Steel Springs | ||||||||||
1/4" | 7/16" | 1/2" | Steel | 20,000 | 1.5 | Required | 16 | -20° to 250° | 0000000 | 00000 |
Metal Ratcheting Gears
Compared to plastic gears, these metal ratcheting gears are better for high-load, high-speed, and heavy duty applications. Used to prevent unwanted motion in jacks, tie downs, clutches, and winches, ratchet gears have sloped teeth that allow motion in one direction and prevent it in the other. Gears with teeth that are not hardened can be hardened to fit your application. Hardening a gear’s teeth increases its wear resistance.
A pawl is required to prevent backward motion.
For technical drawings and 3-D models, click on a part number.
Plastic Ratcheting Gears
A light duty alternative to metal, these plastic ratcheting gears run quieter than metal gears and have good corrosion and chemical resistance. Used to prevent unwanted motion in spools, clocks, and printers, ratchet gears have sloped teeth that allow motion in one direction and prevent it in the other.
A pawl is required to prevent backward motion.
For technical drawings and 3-D models, click on a part number.
Face Wd. | Number of Teeth | OD | For Shaft Dia. | Mounting Distance | Material | Fabrication | Color | Each | |
Round Bore | |||||||||
---|---|---|---|---|---|---|---|---|---|
1/4" | 30 | 1.25" | 1/4" | 0.92" | Nylon Plastic | Machined | White | 0000000 | 000000 |