About Shaft Couplings
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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.
Nylon Plastic Sleeves | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Steel Hubs | Misalignment Capability | ||||||||||||
| O'all Lg. | OD | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | Max. Temp., °F | Each | ||
| 1 25/32" | 1 37/64" | Continuous | 0000000 | 000000 | 14,000 | 255 | 0.016" | 1° | 0.04" | 180° | 0000000 | 000000 | |
| 1 31/32" | 1 29/32" | Continuous | 0000000 | 00000 | 11,800 | 425 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 2 5/64" | 2 1/16" | Continuous | 0000000 | 00000 | 10,600 | 530 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 3 5/32" | 3" | Continuous | 0000000 | 00000 | 7,500 | 1,590 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 3 5/32" | 3 1/4" | Continuous | 0000000 | 00000 | 6,700 | 2,120 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 3 11/64" | 2 19/32" | Continuous | 0000000 | 00000 | 8,500 | 1,195 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 3 3/8" | 3 41/64" | Continuous | 0000000 | 000000 | 6,000 | 2,655 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 3 59/64" | 3 57/64" | Continuous | 0000000 | 000000 | 5,600 | 3,715 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 45mm | 33mm | Continuous | 0000000 | 00000 | 14,000 | 265 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 49.8mm | 38.9mm | Continuous | 0000000 | 00000 | 11,800 | 425 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 52.6mm | 44.7mm | Continuous | 0000000 | 00000 | 10,600 | 530 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 80mm | 68.6mm | Continuous | 22mm | 00000000 | 00000 | 6,700 | 2,120 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 |
| 80.5mm | 53.8mm | Continuous | 0000000 | 00000 | 8,500 | 1,195 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 | |
| 99.3mm | 77.7mm | Continuous | 25mm | 00000000 | 000000 | 5,600 | 3,715 | 0.016" | 1° | 0.04" | 180° | 0000000 | 00000 |
| 140mm | 110mm | Continuous | 25mm | 00000000 | 000000 | 4,000 | 10,080 | 0.016" | 1° | 0.04" | 180° | 0000000 | 000000 |
Ultra-High-Torque Flexible Shaft Couplings
With a rigid gear design, these steel couplings transmit more torque than other couplings of the same size. Lubrication is required. To install, heat the hubs to expand them slightly and fit them onto the shaft. When they cool, hubs shrink to fit the shaft tightly.
A complete coupling consists of two hubs, one sleeve, and one seal kit (each component sold separately).
For technical drawings and 3-D models, click on a part number.
Steel Sleeves | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Steel Hubs | Misalignment Capability | Seal Kits | |||||||||||||
| O'all Lg. | OD | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | Each | Includes | Each | |||
| 3 1/8" | 3 5/16" | Continuous | 0000000 | 0000000 | 6,000 | 2,500 | 0.005" | 1° | 0.03" | 0000000 | 0000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 0000000 | 000000 | |
| 3 3/4" | 3 3/4" | Continuous | 0000000 | 000000 | 5,000 | 7,600 | 0.007" | 1° | 0.03" | 0000000 | 000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 0000000 | 00000 | |
| 4 1/4" | 4 3/4" | Continuous | 0000000 | 000000 | 4,200 | 20,200 | 0.007" | 1° | 0.03" | 0000000 | 000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 0000000 | 00000 | |
| 4 3/4" | 5 1/2" | Continuous | 0000000 | 000000 | 3,750 | 30,200 | 0.007" | 1° | 0.05" | 0000000 | 000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 0000000 | 000000 | |
High-Speed Vibration-Damping Flexible Shaft Couplings
Use these gear-shaped couplings for high-speed and high-torque applications. A rubber center allows flexing so couplings can take on multiple types of misalignment while damping vibration and shock. With no metal-to-metal contact, there’s no need for lubrication. 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 center (each component sold separately).
Hubs have a keyway, except hubs for 1/4" and 3/8" shaft dia. do not have a keyway.
For technical drawings and 3-D models, click on a part number.
Centers | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hubs | Misalignment Capability | ||||||||||||||
| O'all Lg. | OD | For Motion Type | Material | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Axial | Temp. Range, °F | Material | Each | ||
| 2" | 2 1/16" | Continuous | Sintered Steel | 000000 | 000000 | 9,200 | 60 | 0.01" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 2 3/8" | 2 15/32" | Continuous | Sintered Steel | 000000 | 00000 | 7,600 | 120 | 0.01" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 2 13/16" | 3 1/4" | Continuous | Cast Iron | 0000000 | 00000 | 7,600 | 240 | 0.015" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 2 7/8" | 3 1/4" | Continuous | Sintered Steel | 0000000 | 00000 | 7,600 | 240 | 0.015" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 3 5/16" | 4" | Continuous | Sintered Steel | 0000000 | 00000 | 6,000 | 450 | 0.015" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 3 1/2" | 4" | Continuous | Cast Iron | 0000000 | 00000 | 6,000 | 450 | 0.015" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 3 15/16" | 4 5/8" | Continuous | Cast Iron | 000000 | 00000 | 5,250 | 725 | 0.02" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 4 7/16" | 5 29/64" | Continuous | Cast Iron | 0000000 | 00000 | 4,500 | 1,135 | 0.02" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 5 1/16" | 6 23/64" | Continuous | Cast Iron | 000000 | 000000 | 3,750 | 1,800 | 0.025" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 00000 | |
| 5 11/16" | 7 1/2" | Continuous | Cast Iron | 000000 | 000000 | 3,600 | 2,875 | 0.025" | 1° | 0.125" | -30° to 275° | TPE Rubber | 0000000 | 000000 | |
| 7 1/8" | 8 5/8" | Continuous | Cast Iron | 000000 | 000000 | 3,600 | 4,530 | 0.032" | 1° | 0.125" | -30° to 275° | EPDM Rubber | 0000000 | 000000 | |
Splined Flexible Shaft Couplings
For use with splined shafts, which are commonly found in gearboxes and pumps, these couplings are capable of transmitting more torque than couplings for round and keyed shafts. They 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 (each component sold separately). Hubs fasten onto your shafts without damaging them. Tighten the clamping screws to secure.
Buna-N spiders provide good vibration damping and chemical resistance. Hytrel spiders provide fair vibration damping and excellent chemical resistance. Polyurethane spiders provide fair vibration damping and good chemical resistance.
For technical drawings and 3-D models, click on a part number.
Dia. | ||
|---|---|---|
| SAE Spline Size | (X) | (Y) |
| A | 5/8" | 0.509" |
| B | 7/8" | 0.754" |
| B-B | 1" | 0.877" |
| C | 1 1/4" | 1.087" |
| D | 1 3/4" | 1.506" |
| E | 1 3/4" | 1.506" |
Buna-N Rubber Spiders | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron Hubs | Misalignment Capability | |||||||||||||
| O'all Lg. | OD | Pitch | Pressure Angle | For Motion Type | Choose an SAE Spline Size | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 2 3/16" | 2 7/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 000000 | 9,000 | 140 | 0.015" | 1° | -40° to 212° | 0000000 | 000000 | |
| 2 9/16" | 2 7/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 9,000 | 140 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 | |
| 2 7/8" | 2 17/32" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 7,000 | 315 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 | |
| 3 1/2" | 2 17/32" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 7,000 | 315 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 | |
| 4 1/4" | 3 21/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 5,000 | 790 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 | |
| 4 1/2" | 3 3/4" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 000000 | 5,000 | 1,240 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 | |
Hytrel Rubber Spiders | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron Hubs | Misalignment Capability | |||||||||||||
| O'all Lg. | OD | Pitch | Pressure Angle | For Motion Type | Choose an SAE Spline Size | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 2 3/16" | 2 7/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 000000 | 3,600 | 400 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 | |
| 2 9/16" | 2 7/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55° to 245° | 0000000 | 00000 | |
| 2 7/8" | 2 17/32" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 | |
| 3 1/2" | 2 17/32" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 | |
| 4 1/4" | 3 21/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 2,265 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 | |
| 4 1/2" | 3 3/4" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 000000 | 3,600 | 3,705 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 | |
Polyurethane Spiders | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron Hubs | Misalignment Capability | |||||||||||||
| O'all Lg. | OD | Pitch | Pressure Angle | For Motion Type | Choose an SAE Spline Size | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | Temp. Range, °F | Each | ||
| 2 3/16" | 2 7/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 000000 | 3,600 | 210 | 0.015" | 1° | -30° to 160° | 0000000 | 000000 | |
| 2 9/16" | 2 7/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 210 | 0.015" | 1° | -30° to 160° | 0000000 | 00000 | |
| 2 7/8" | 2 17/32" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 475 | 0.015" | 1° | -30° to 160° | 0000000 | 00000 | |
| 3 1/2" | 2 17/32" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 475 | 0.015" | 1° | -30° to 160° | 0000000 | 00000 | |
| 4 1/4" | 3 21/64" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 00000 | 3,600 | 1,185 | 0.015" | 1° | -30° to 160° | 0000000 | 000000 | |
| 4 1/2" | 3 3/4" | 0.5" | 30° | Forward/Reverse, Start/Stop, Continuous | 000000 | 000000 | 3,600 | 1,860 | 0.015" | 1° | -30° to 160° | 0000000 | 000000 | |