About Shaft Couplings
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About Shaft Collars
Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.
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Clamping Vibration-Damping Precision Flexible Shaft Couplings
Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft. Tighten the clamping screws to secure. Good for precision motor and pump applications, the spider-shaped cushion reduces shock and compensates for minor shaft misalignment. Couplings allow zero backlash (no play).
A complete coupling consists of two hubs and one spider (each component sold separately). Hubs are lightweight, corrosion-resistant aluminum. Spiders are polyurethane for fair vibration damping and good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Durometer 98A Polyurethane Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | ||||||||||||
| Overall Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 53mm | 41.3mm | Round | Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 8,000 | 330 | 0.004" | 0.8° | 0° to 180° | 0000000 | 000000 |
| 53mm | 41.3mm | Keyed | Forward/Reverse, Start/Stop | 18mm | 0000000 | 00000 | 8,000 | 330 | 0.004" | 0.8° | 0° to 180° | 0000000 | 00000 |
Durometer 92A Polyurethane Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | ||||||||||||
| Overall Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 53mm | 41.3mm | Round | Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 8,000 | 190 | 0.006" | 0.9° | 0° to 180° | 0000000 | 000000 |
| 53mm | 41.3mm | Keyed | Forward/Reverse, Start/Stop | 18mm | 0000000 | 00000 | 8,000 | 190 | 0.006" | 0.9° | 0° to 180° | 0000000 | 00000 |
Set Screw Vibration-Damping Precision Flexible Shaft Couplings
The included set screw holds the coupling in place. Good for precision motor and pump applications, the spider-shaped cushion reduces shock and compensates for minor shaft misalignment. Couplings allow zero backlash (no play).
A complete coupling consists of two hubs and one spider (each component sold separately). Hubs are lightweight, corrosion-resistant aluminum. Spiders are polyurethane for fair vibration damping and good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Durometer 98A Polyurethane Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | ||||||||||||
| Overall Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 53mm | 41mm | Round | Continuous, Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 8,000 | 330 | 0.004" | 0.8° | 0° to 180° | 0000000 | 000000 |
| 61mm | 50mm | Keyed | Continuous, Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 8,000 | 550 | 0.005" | 0.8° | 0° to 180° | 0000000 | 00000 |
Durometer 92A Polyurethane Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | ||||||||||||
| Overall Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 53mm | 41mm | Round | Continuous, Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 8,000 | 190 | 0.006" | 0.9° | 0° to 180° | 0000000 | 000000 |
| 61mm | 50mm | Keyed | Continuous, Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 8,000 | 440 | 0.006" | 0.9° | 0° to 180° | 0000000 | 00000 |
Servomotor Precision Flexible Shaft Couplings
Able to handle high twisting forces as well as misalignment, these couplings are good for high-performance servomotor applications. Couplings are aluminum and stainless steel for corrosion resistance and allow zero backlash (no play). They grip evenly around your shaft for a strong hold without marring the shaft. Tighten the clamping screws to secure.
For technical drawings and 3-D models, click on a part number.
Misalignment Capability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Overall Lg. | OD | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | For Motion Type | Each | |
2017 Aluminum and 304 Stainless Steel | ||||||||||
| 3/8" × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 0000000 |
| 1/2" × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5/8" × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/4" × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1" × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 16mm × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 17mm × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 18mm × 18mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 18mm × 19mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 18mm × 20mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 18mm × 22mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 18mm × 24mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 18mm × 25mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
Set Screw Flexible Shaft Couplings
Each hub includes a set screw (unless noted), which bites into your shaft to hold the coupling in place. Also known as Lovejoy® couplings, these three-piece couplings have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment.
A complete coupling consists of two hubs and one spider, or two hubs, one split spider, and one retaining ring (all components sold separately). Split spiders are easier to install and replace than standard spiders because there’s no need for tools or removing your hubs. Twist-lock them in place using a retaining ring.
Buna-N spiders provide good vibration damping and chemical resistance. Hytrel spiders provide fair vibration damping and excellent chemical resistance. Polyurethane spiders and split spiders provide fair vibration damping and good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Polyurethane Split Spiders | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron Hubs | Misalignment Capability | 347 Stainless Steel Retaining Rings | |||||||||||||
| Overall Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | Each | |||
| 2 5/32" | 2 7/64" | Keyed | Forward/Reverse, Start/Stop | 18mm | 0000000 | 000000 | 9,200 | 670 | 0.03" | 2° | -30° to 200° | 0000000 | 000000 | 0000000 | 000000 |
High-Torque Set Screw Flexible Shaft Couplings
The thick split spider on these couplings takes on twice as much torque as standard split spiders, while a set screw holds the hubs in place on your shaft. Also known as jaw couplings, use them to connect motors to pumps, mixers, and other high-torque equipment. You don’t need to lubricate them.
For a complete coupling, you’ll need two hubs, one split spider, and a split spider cover (all sold separately).
Hubs attach to the end of your shaft.
Split spiders cushion between the two hubs to dampen vibration, reduce shocks, and handle shaft misalignment, extending the life of bearings, seals, and motors. You can replace them without having to remove the hubs or move your shaft and equipment around, which reduces the risk of needing to realign the shaft. Spiders with medium-soft hardness are the most commonly used and are good for applications that start, stop, and reverse often. Those with medium hardness handle higher torque than those with medium-soft hardness, but they don’t reduce vibration as well.
Split spider covers hold the spider in place.
For technical drawings and 3-D models, click on a part number.
Urethane Split Spiders | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel Hubs | Misalignment Capability | 303 Stainless Steel Split Spider Covers | |||||||||||||
| Overall Lg. | OD | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Color | Each | Each | |||
| 2 13/16" | 2" | Forward/Reverse, Start/Stop | 18mm | 000000 | 000000 | 12,000 | 375 | 0.02" | 2° | -60° to 212° | Red | 0000000 | 000000 | 0000000 | 000000 |
Urethane Split Spiders | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel Hubs | Misalignment Capability | 303 Stainless Steel Split Spider Covers | |||||||||||||
| Overall Lg. | OD | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Color | Each | Each | |||
| 2 13/16" | 2" | Forward/Reverse, Start/Stop | 18mm | 000000 | 000000 | 12,000 | 815 | 0.02" | 2° | -60° to 212° | Blue | 0000000 | 000000 | 0000000 | 000000 |
Urethane Split Spiders | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel Hubs | Misalignment Capability | 303 Stainless Steel Split Spider Covers | |||||||||||||
| Overall Lg. | OD | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Color | Each | Each | |||
| 2 13/16" | 2" | Forward/Reverse, Start/Stop | 18mm | 000000 | 000000 | 12,000 | 815 | 0.02" | 2° | -60° to 350° | White | 0000000 | 000000 | 0000000 | 000000 |
Clamping High-Parallel-Misalignment Flexible Shaft Couplings
Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft. Tighten the clamping screws to secure. Also known as Oldham couplings, they have a slotted disc that allows hubs to slide independently—good for applications with parallel shaft misalignment. They also allow zero backlash (no play) and never need lubrication.
A complete coupling consists of two hubs and one disc (each component sold separately).
Aluminum hubs are lightweight and have good corrosion resistance.
Acetal discs stand up to high twisting forces. Nylon discs have excellent vibration and shock absorption. PEEK discs have excellent impact resistance and the chemical resistance to withstand a variety of acids and other harsh substances.
Lightweight Flexible Shaft Couplings
Made with lightweight nylon sleeves, these gear couplings require less energy to move than other high-torque flexible couplings. They compensate for parallel, angular, and axial misalignment. Fasten to your shafts by tightening the set screws, which bite into the shaft to hold it.
A complete coupling consists of two hubs and one sleeve (each component sold separately).
For technical drawings and 3-D models, click on a part number.
High-Grip Clamping Shaft Couplings
These couplings have the gripping strength to handle higher torque than most other couplings. Couplings clamp evenly around the shaft to create a mar-free hold. Slide onto the end of your shaft and tighten the clamping screws to secure. Good for high-torque applications, rigid couplings connect two shafts that are aligned, allowing for no relative movement between the shafts.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | Overall Lg. | OD | Max. Speed, rpm | Max. Torque, in.-lbs. | For Motion Type | Each | |
Steel | |||||||
|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||
| 18mm | 60mm | 36mm | Not Rated | Not Rated | Forward/Reverse, Start/Stop, Continuous | 0000000 | 000000 |
High-Grip Two-Piece Shaft Couplings
These couplings have the gripping strength to handle higher torque than most other couplings. Install them anywhere on a shaft without removing components or having access to the ends of the shaft. Tighten the clamping screws to secure. Good for high-torque applications, rigid couplings connect two shafts that are aligned, allowing for no relative movement between the shafts.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | Overall Lg. | OD | Max. Speed, rpm | Max. Torque, in.-lbs. | For Motion Type | Each | |
Steel | |||||||
|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||
| 18mm | 60mm | 36mm | Not Rated | Not Rated | Forward/Reverse, Start/Stop, Continuous | 0000000 | 0000000 |
Clamping Shaft Collars
These metal collars are stronger than plastic shaft collars. They clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screw to secure.
Black-oxide steel collars have some corrosion resistance. Zinc-plated steel collars have moderate corrosion resistance. Aluminum collars are lightweight and have good corrosion resistance. 303 stainless steel collars have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Washdown Clamping Shaft Collars
Suitable for use in washdown applications, these plastic collars also offer good chemical resistance. They clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screw to secure.
Acetal collars have a naturally slippery surface and resist swelling when exposed to moisture.
For technical drawings and 3-D models, click on a part number.
Clamping Screw | White Acetal Plastic | |||||
|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Type | No. Included | Each | |
| 18 | 36 | 13 | Socket Head Screw | 1 | 00000000 | 000000 |
Tight-Hold Quick-Release Clamping Shaft Collars
A threaded lever lets you tighten these collars with more torque than other quick-release styles, ensuring that they stay put on your shaft. Use them to quickly move components or make setup changes, such as on packing equipment, printers, or label feeding machines. To make adjustments in tight spaces, lift the lever and twist to the side. Similar to a ratchet, you can lift the lever to disengage from the threads and reposition.
Black oxide steel collars are very strong, but will rust if exposed to moisture.
Anodized aluminum is strong and lightweight. It can withstand humidity without rusting, but water left on the surface will cause it to corrode.
303 stainless steel collars can handle frequent exposure to water without rusting.
For technical drawings and 3-D models, click on a part number.
Set Screw Shaft Collars
Keep these shaft collars in place by tightening their set screw into the shaft. The tip of the screw digs in for a secure hold, but will mar the shaft’s surface. For maximum holding power, make sure the set screw material is harder than your shaft material. Use these shaft collars to position and retain power transmission components such as sprockets, pulleys, and bearings. You can also use them to limit the movement of a shaft.
Carbon steel collars are strong and wear resistant. Collars with a black-oxide finish have some corrosion resistance, but only in dry environments. Their dark color can be useful for matching other parts in your system. Collars that are blue make it easy to identify metric collars at a glance. They’re tinted to match other blue metric fasteners.
303 stainless steel collars are corrosion resistant and highly machinable.
DIN 705 collars meet an international standard for shaft collar dimensions.
For technical drawings and 3-D models, click on a part number.
Set Screw | |||||||
|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Type | No. Included | Specifications Met | Each | |
Carbon Steel | |||||||
| 18 | 32 | 14 | Hex Socket | 1 | DIN 705 | 0000000 | 00000 |
Black-Oxide 1215 Carbon Steel | |||||||
| 18 | 32 | 14 | Hex Socket | 1 | __ | 00000000 | 0000 |
Blue Passivated Carbon Steel | |||||||
| 18 | 32 | 14 | Hex Socket | 1 | DIN 705 | 0000000 | 0000 |
303 Stainless Steel  | |||||||
| 18 | 32 | 14 | Hex Socket | 1 | __ | 00000000 | 00000 |
| 18 | 32 | 14 | Hex Socket | 1 | DIN 705 | 0000000 | 00000 |
Clamping Two-Piece Shaft Collars
These metal collars are stronger than plastic shaft collars. The two-piece design allows you to install them anywhere on a shaft without removing components or having access to the ends of the shaft. Collars clamp evenly around the shaft to create a strong, mar-free hold. Tighten the clamping screws to secure.
Black-oxide steel collars have some corrosion resistance. Aluminum collars are lightweight and have good corrosion resistance. 303 stainless steel collars have excellent corrosion resistance. 316 stainless steel collars have excellent corrosion and chemical resistance.
For technical drawings and 3-D models, click on a part number.
Keyway | Clamping Screw | |||||||
|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Wd., mm | Dp., mm | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||||
| 18 | 36 | 13 | 6 | 2.8 | Socket Head Screw | 2 | 0000000 | 000000 |
Washdown Clamping Two-Piece Shaft Collars
Suitable for use in washdown applications, these plastic collars also offer good chemical resistance. The two-piece design allows you to install them anywhere on a shaft without removing components or having access to the ends of the shaft. Collars clamp evenly around the shaft to create a strong, mar-free hold. Tighten the clamping screws to secure.
Acetal collars have a naturally slippery surface and resist swelling when exposed to moisture.
For technical drawings and 3-D models, click on a part number.
Clamping Screw | White Acetal Plastic | |||||
|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Type | No. Included | Each | |
| 18 | 36 | 13 | Socket Head Screw | 2 | 0000000 | 000000 |
Clamping Two-Piece Shaft Collars with Wrench Flats
Use a wrench to rotate your drive shaft without marring or gouging the shaft. Fasten one of these collars onto your shaft, position a wrench on the collar’s wrench flats, and then rotate the entire shaft/collar assembly to adjust the shaft. The two-piece design allows you to install these collars anywhere on a shaft without removing components or having access to the ends of the shaft. Tighten the clamping screws to secure.
Black-oxide steel collars have some corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Clamping Screw | Black-Oxide 1215 Carbon Steel | ||||||
|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Flat-to-Flat Ht., mm | Type | No. Included | Each | |
| 18 | 36 | 13 | 31 | Socket Head Screw | 2 | 00000000 | 000000 |
Quick-Release Two-Piece Clamping Shaft Collars
Make quick adjustments to these shaft collars with a lever on the side. Often used on packing equipment, printers, and label feeding machines, these collars are used to quickly move components or make setup changes. To make adjustments in tight spaces, lift the lever and twist to either side. Similar to a ratchet, you can tighten and loosen with the lever down; lift the lever to disengage from the threads and reposition. The two pieces of the collar separate, so you can install them anywhere on a shaft without removing components or having access to the end.
Black oxide steel collars are very strong, but will rust if exposed to moisture.
Anodized aluminum is strong and lightweight. It can withstand humidity without rusting, but water left on the surface will cause it to corrode.
303 stainless steel collars can handle frequent exposure to water without rusting.
For technical drawings and 3-D models, click on a part number.
Hinged Shaft Collars
Offering the benefits of a two-piece collar in a one-piece design, these collars swing open for positioning then close anywhere on your shaft. Tighten the clamping screw to secure. The screw is captive so it won’t fall out, making these collars good for use in tight areas where you can’t hold the screw in place. Collars clamp evenly around your shaft to create a strong, mar-free hold.
Black-oxide steel collars have some corrosion resistance. 303 stainless steel collars have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Flange-Mount Shaft Collars
Three tapped counterbored holes and three unthreaded holes provide mounting flexibility. Collars clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screws to secure.
Collars with keyway have a standard ANSI keyway for use with keyed shafts, keys, and key stock.
Black-oxide steel collars are stronger than aluminum and stainless steel collars. They have some corrosion resistance. Aluminum collars are lightweight and have good corrosion resistance. 303 stainless steel collars have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Flange | Keyway | Clamping Screw | Counterbored Mounting Holes | Unthreaded Mounting Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | OD, mm | Thick., mm | Wd., mm | Dp., mm | Type | No. Included | Mounting Fasteners Included | Thread Size | Thread Pitch, mm | No. of | Dia., mm | No. of | Each | |
Black-Oxide 1117 Carbon Steel | ||||||||||||||||
| 18 | 36 | 20.64 | 63 | 6.85 | 6 | 2.8 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5.4 | 3 | 0000000 | 000000 |
2024 Aluminum | ||||||||||||||||
| 18 | 36 | 20.64 | 63 | 6.85 | 6 | 2.8 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5 | 3 | 0000000 | 00000 |
303 Stainless Steel | ||||||||||||||||
| 18 | 36 | 20.64 | 63 | 6.85 | 6 | 2.8 | Socket Head Screw | 2 | No | M5 | 0.8 | 3 | 5.4 | 3 | 0000000 | 000000 |
Face-Mount Shaft Collars
Two tapped holes on the face of these collars allow you to fasten them to gears, pulleys, and sprockets. Collars clamp evenly around the shaft to create a strong, mar-free hold. To use, slide onto your shaft and tighten the clamping screw to secure.
Black-oxide steel collars have some corrosion resistance. 303 stainless steel collars have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.