About Shaft Couplings
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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.
Buna-N Rubber Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron 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 | ||
| 4 7/32" | 3 21/64" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 5,000 | 790 | 0.015" | 1° | -40° to 212° | 0000000 | 000000 |
| 4 1/2" | 3 3/4" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 5,000 | 1,240 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 |
| 4 7/8" | 4 1/2" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 5,000 | 1,725 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 |
| 5 11/32" | 5" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 4,200 | 2,340 | 0.015" | 1° | -40° to 212° | 0000000 | 00000 |
Hytrel Rubber Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron 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 | ||
| 4 7/32" | 3 21/64" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 3,600 | 2,265 | 0.015" | 0.5° | -55° to 245° | 0000000 | 0000000 |
| 4 1/2" | 3 3/4" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 3,600 | 3,705 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 |
| 4 7/8" | 4 1/2" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 5,000 | 4,680 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 |
| 5 11/32" | 5" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 4,200 | 6,225 | 0.015" | 0.5° | -55° to 245° | 0000000 | 000000 |
Polyurethane Spiders | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron 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 | ||
| 4 7/32" | 3 21/64" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 3,600 | 1,185 | 0.015" | 1° | -30° to 160° | 0000000 | 0000000 |
| 4 1/2" | 3 3/4" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 3,600 | 1,860 | 0.015" | 1° | -30° to 160° | 0000000 | 000000 |
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 | |||
| 4 7/32" | 3 21/64" | Keyed | Forward/Reverse, Start/Stop | 1 7/16" | 0000000 | 000000 | 5,900 | 2,180 | 0.03" | 2° | -30° to 200° | 0000000 | 0000000 | 0000000 | 0000000 |
Shock-Absorbing Flexible Shaft Couplings
A strip of flexible spring steel wraps around the teeth of both hubs to absorb sharp, momentary load increases that can come from motor startups, emergency braking, or sudden impact with hard objects. When the shock load hits, the strip of spring steel (known as a grid) flexes to spread out the load. After the load passes, the grid straightens back out. They're commonly found in wire drawing and cutting machines, pulverizers, and mixers. Compared to spider couplings, jaw couplings, and other flexible shaft couplings, these handle higher torque while taking up less space. All have keyed bores to work with keyed shafts, which transmit higher torque with less slippage than round shafts.
A complete coupling consists of two hubs as well as a grid and cover assembly (all sold separately). The grid and cover assembly includes a spring steel grid, aluminum cover, rubber seals, and grease for lubrication. When ordering, please choose components that have the same manufacturer series number, otherwise the grid will not fit.
For technical drawings and 3-D models, click on a part number.
Grid and Cover Assemblies | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hubs | Misalignment Capability | Replacement Grids | Replacement Seal Kits | |||||||||||||
| O'all Lg. | OD | For Motion Type | Mfr. Series | For Shaft Dia. | Each | Parallel | Angular | Max. Speed, rpm | Max. Torque, in.-lbs. | Each | Each | Each | ||||
Black-Oxide Steel | ||||||||||||||||
For Keyed Shaft | ||||||||||||||||
| 4 7/8" | 3 19/32" | Continuous, Forward/Reverse, Start/Stop | Martin (1050T) | 1 7/16" | 000000 | 0000000 | 0.016" | 0.25° | 4,500 | 3,850 | 00000000 | 0000000 | 00000000 | 0000000 | 00000000 | 000000 |
| Additional Grease (14 fl. oz. Grease Gun Cartridge) | 0000000 | Each | 000000 |
High-Torque Flexible Shaft Couplings
With a rugged roller-chain design, these couplings provide excellent torque and angular misalignment capacities. Lubrication is required. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.
A complete coupling consists of two hubs and one roller chain (each component sold separately). Complete couplings meet ANSI B29.23M-1995.
Optional covers retain grease lubrication and provide protection from abrasion and corrosion.
For technical drawings and 3-D models, click on a part number.
Steel Roller Chain | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Steel Hubs | Misalignment Capability | Roller Chain | Orange Nylon Plastic Covers | |||||||||||||
| O'all Lg. | OD | OD with Cover | For Motion Type | For Shaft Dia. | Each | Max. Speed, rpm | Max. Torque, in.-lbs. | Parallel | Angular | No. | Standard | Each | Each | |||
| 2 29/32" | 3 25/32" | 5 1/8" | Continuous | 1 7/16" | 0000000 | 000000 | 4,000 | 4,610 | 0.012" | 2° | 50-2 | ANSI | 0000000 | 000000 | 0000000 | 0000000 |
| 3 29/64" | 5" | 6 3/8" | Continuous | 1 7/16" | 0000000 | 00000 | 3,000 | 10,900 | 0.012" | 1.5° | 60-2 | ANSI | 0000000 | 00000 | 0000000 | 000000 |
Clamping Shaft Couplings
Designed to grip evenly around your shaft, clamping couplings provide more holding power than set screw couplings without marring the shaft. 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.
Stainless steel couplings have excellent corrosion resistance.
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 | |||||||
| 1 7/16" × 1 7/16" | 3 7/8" | 2 5/8" | 4,000 | 6,800 | Forward/Reverse, Start/Stop, Continuous | 00000000 | 0000000 |
For Round Shafts | |||||||
| 1 7/16" × 1" | 3 7/8" | 2 5/8" | 4,000 | 6,800 | Forward/Reverse, Start/Stop, Continuous | 00000000 | 000000 |
| 1 7/16" × 1 7/16" | 3 7/8" | 2 5/8" | 4,000 | 6,800 | Forward/Reverse, Start/Stop, Continuous | 00000000 | 000000 |
303 Stainless Steel | |||||||
For Keyed Shafts | |||||||
| 1 7/16" × 1 7/16" | 3 7/8" | 2 5/8" | 4,000 | 4,000 | Forward/Reverse, Start/Stop, Continuous | 0000000 | 000000 |
For Round Shafts | |||||||
| 1 7/16" × 1" | 3 7/8" | 2 5/8" | 4,000 | 4,000 | Forward/Reverse, Start/Stop, Continuous | 00000000 | 000000 |
| 1 7/16" × 1 7/16" | 3 7/8" | 2 5/8" | 4,000 | 4,000 | Forward/Reverse, Start/Stop, Continuous | 00000000 | 000000 |
Two-Piece Shaft Coupling Bridges
When your shafts are not close enough to use standard couplings, these have the length to bridge the gap. 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 | |
Cast Iron | |||||||
|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||
| 1 7/16" | 7 1/8" | 4 1/2" | 4,130 | 3,500 | Forward/Reverse, Start/Stop, Continuous | 0000000 | 0000000 |
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 | Replacement Bushings for Optional Sprockets | |||||||||||||||
| 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 | For Roller Chain Trade Size | Each | ||||
Single Spring | |||||||||||||||||||
| 1 7/16" | 5" | 2 7/8" | 3/8" | 3/16" | 5/8" | 1/8" | 90 | 250 | Steel | 00000000 | 0000000 | 0000000 | 000000 | 0000000 | 000000 | 000000 | 00000 | ||
| 1 7/16" | 6" | 3" | 3/8" | 3/16" | 13/16" | 1/8" | 24 | 320 | Steel | 00000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 | __ | 000000 | 00 | |
Double Spring | |||||||||||||||||||
| 1 7/16" | 5" | 2 7/8" | 3/8" | 3/16" | 5/8" | 1/8" | 120 | 400 | Steel | 00000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 | 000000 | 0000 | ||
| 1 7/16" | 6" | 3" | 3/8" | 3/16" | 3/4" | 1/8" | 26 | 440 | Steel | 00000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 | __ | 000000 | 00 | |
| For OD | Each | |
| 5" | 00000000 | 000000 |