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 | 17mm | 0000000 | 000000 | 8,000 | 330 | 0.004" | 0.8° | 0° to 180° | 0000000 | 000000 |
| 53mm | 41.3mm | Keyed | Forward/Reverse, Start/Stop | 17mm | 0000000 | 00000 | 8,000 | 330 | 0.004" | 0.8° | 0° to 180° | 0000000 | 00000 |
| 61mm | 50.8mm | Keyed | Forward/Reverse, Start/Stop | 17mm | 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 | 41.3mm | Round | Forward/Reverse, Start/Stop | 17mm | 0000000 | 000000 | 8,000 | 190 | 0.006" | 0.9° | 0° to 180° | 0000000 | 000000 |
| 53mm | 41.3mm | Keyed | Forward/Reverse, Start/Stop | 17mm | 0000000 | 00000 | 8,000 | 190 | 0.006" | 0.9° | 0° to 180° | 0000000 | 00000 |
| 61mm | 50.8mm | Keyed | Forward/Reverse, Start/Stop | 17mm | 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" × 17mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 0000000 |
| 1/2" × 17mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5/8" × 17mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/4" × 17mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1" × 17mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 16mm × 17mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 17mm × 17mm | 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 |
| 17mm × 19mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 17mm × 20mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 17mm × 22mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 17mm × 24mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 17mm × 25mm | 2 23/64" | 2 7/32" | 10,000 | 220 | 0.011" | 1° | 0.031" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
High-Speed Servomotor Precision Flexible Shaft Couplings
Connect shafts and ball screws to high-speed servomotors and stepper motors—these shaft couplings handle four times more speed than standard servomotor couplings. They’re often found on high-torque motors that frequently start and stop, such as those used with packaging machines, press brakes, and semiconductor manufacturing equipment.
With aluminum hubs joined by a flexible fluoroelastomer or nitrile rubber core, these shaft couplings dampen vibration and adjust for misalignment. When machines accelerate and decelerate quickly, these couplings remain stiff to maintain accuracy and repeatability, which prevents equipment from moving out of place. They also resist backlash, meaning all of the turning force from the motor is passed on to the connected shaft. The core resists water, petroleum-based chemicals, and inorganic acids while also insulating bearings, encoders, and other shaft components from stray electric current. Clamping screws provide hold without marring shafts; they’re useful in applications where shafts are frequently assembled and disassembled.
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 with Fluoroelastomer Rubber Center | ||||||||||
| 17mm × 17mm | 1 57/64" | 1 17/32" | 15,000 | 119 | 0.008" | 1.5° | 0.012" | Forward/Reverse, Start/Stop | 00000000 | 0000000 |
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.
Buna-N spiders provide good vibration damping and chemical resistance. Hytrel spiders provide fair vibration damping and excellent chemical resistance.
For technical drawings and 3-D models, click on a part number.
Buna-N Rubber Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Steel Hubs | Misalignment Capability | ||||||||||||
| Overall Lg., mm | OD, mm | For Shaft Type | For Motion Type | For Shaft Dia., mm | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 51 | 35 | Keyed | Forward/Reverse, Start/Stop | 17 | 00000000 | 000000 | 14,000 | 43 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 |
| 64 | 54 | Keyed | Forward/Reverse, Start/Stop | 17 | 0000000 | 00000 | 9,000 | 140 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 |
Hytrel Rubber Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Steel Hubs | Misalignment Capability | ||||||||||||
| Overall Lg., mm | OD, mm | For Shaft Type | For Motion Type | For Shaft Dia., mm | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 51 | 35 | Keyed | Forward/Reverse, Start/Stop | 17 | 00000000 | 000000 | 3,600 | 110 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 |
| 64 | 54 | Keyed | Forward/Reverse, Start/Stop | 17 | 0000000 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55° to 245° | 0000000 | 00000 |
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.
Acetal Plastic Discs | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | |||||||||||||
| O'all Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | Temp. Range, °F | Each | ||
| 2" | 1 5/8" | Round | Forward/Reverse, Start/Stop | 17mm | 000000 | 000000 | 4,500 | 480 | 0.01" | 0.5° | 0.006" | -10° to 150° | 00000000 | 000000 |
| 2" | 1 5/8" | Keyed | Forward/Reverse, Start/Stop | 17mm | 0000000 | 00000 | 4,500 | 480 | 0.01" | 0.5° | 0.006" | -10° to 150° | 00000000 | 00000 |
Nylon Plastic Discs | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | |||||||||||||
| O'all Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | Temp. Range, °F | Each | ||
| 2" | 1 5/8" | Round | Forward/Reverse, Start/Stop | 17mm | 000000 | 000000 | 4,500 | 400 | 0.01" | 0.5° | 0.006" | -10° to 130° | 00000000 | 000000 |
| 2" | 1 5/8" | Keyed | Forward/Reverse, Start/Stop | 17mm | 0000000 | 00000 | 4,500 | 400 | 0.01" | 0.5° | 0.006" | -10° to 130° | 00000000 | 00000 |
PEEK Plastic Discs | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2024 Aluminum Hubs | Misalignment Capability | |||||||||||||
| O'all Lg. | OD | For Shaft Type | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | Temp. Range, °F | Each | ||
| 2" | 1 5/8" | Round | Forward/Reverse, Start/Stop | 17mm | 000000 | 000000 | 4,500 | 130 | 0.01" | 0.5° | 0.006" | -10° to 300° | 000000000 | 000000 |
| 2" | 1 5/8" | Keyed | Forward/Reverse, Start/Stop | 17mm | 0000000 | 00000 | 4,500 | 130 | 0.01" | 0.5° | 0.006" | -10° to 300° | 000000000 | 00000 |
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.
Clamping Screw | ||||||
|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 1 | 000000000 | 00000 |
Zinc-Plated 1215 Carbon Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 1 | 000000000 | 00000 |
2024 Aluminum  | ||||||
| 17 | 36 | 13 | Socket Head Screw | 1 | 00000000 | 00000 |
303 Stainless Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 1 | 00000000 | 00000 |
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 | |
| 17 | 36 | 13 | Socket Head Screw | 1 | 0000000 | 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.
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. Zinc-plated steel and chrome-plated steel collars have moderate corrosion resistance with a bright finish. 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.
Clamping Screw | ||||||
|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 2 | 0000000 | 000000 |
Chrome-Plated 1215 Carbon Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 2 | 0000000 | 00000 |
2024 Aluminum | ||||||
| 17 | 36 | 13 | Socket Head Screw | 2 | 0000000 | 00000 |
303 Stainless Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 2 | 0000000 | 00000 |
316 Stainless Steel | ||||||
| 17 | 36 | 13 | Socket Head Screw | 2 | 0000000 | 00000 |
Keyway | Clamping Screw | |||||||
|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | OD, mm | Wd., mm | Wd., mm | Dp., mm | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||||
| 17 | 36 | 13 | 5 | 2.3 | Socket Head Screw | 2 | 0000000 | 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.