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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Quick-Disconnect (QD) Bushings
The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing style. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.
Taper-Lock Bushings
Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing style. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.
Hub-Mount Screw-Clamp Bushings
Transfer torque directly from a shaft to a hub. These bushings install over your hub to mount a sprocket, pulley, or gear to a shaft at the same time. Common in industrial gearbox applications, they can also connect a hollow shaft over a solid shaft. As screw-clamp bushings, they're good for shock loads. When you tighten the included clamping screws, the outer rings compress against a sprocket, pulley, or gear in between them, causing the inner rings to tighten around the shaft.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | OD | Overall Wd. | Max. Torque, in.-lbs. | Fastener Tightening Torque, in.-lbs. | Material | Each | |
| 2 7/16" | 4 5/16" | 1 5/16" | 20,600 | 100 | Zinc-Plated Steel | 0000000 | 0000000 |
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 with a zinc-plated finish have an outer layer of zinc that protects the steel from rust and extends the life of the collar. 303 stainless steel collars are corrosion resistant and highly machinable.
316 stainless steel collars are the most corrosion resistant while still being nearly as strong as steel collars. You can expose them to salt water, chlorine solutions, and chemicals without rusting.
Aluminum collars are lightweight and have good corrosion resistance.
Set Screw | ||||||
|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 1" | Hex Socket | 1 | 0000000 | 000000 |
Zinc-Plated 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 1" | Hex Socket | 1 | 0000000 | 00000 |
303 Stainless Steel  | ||||||
| 2 7/16" | 3 1/2" | 1" | Hex Socket | 1 | 0000000 | 000000 |
316 Stainless Steel | ||||||
| 2 7/16" | 3 1/2" | 1" | Hex Socket | 1 | 0000000 | 000000 |
6061 Aluminum | ||||||
| 2 7/16" | 3 1/2" | 1" | Hex Socket | 1 | 0000000 | 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. 316 stainless steel collars have excellent corrosion and chemical resistance.
Clamping Screw | ||||||
|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 1 | 0000000 | 000000 |
Zinc-Plated 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 1 | 0000000 | 00000 |
2024 Aluminum | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 1 | 0000000 | 00000 |
316 Stainless Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 1 | 0000000 | 000000 |
Extra-Grip Clamping Shaft Collars
With larger clamping screws than those found on standard clamping collars, these provide a stronger grip on your shaft without using additional screws. 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. Collars are black-oxide steel, which offers some corrosion resistance.
Clamping Screw | Black-Oxide 1026 Carbon Steel | |||||
|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |
| 2 7/16" | 4 1/4" | 1" | Socket Head Screw | 1 | 0000000 | 000000 |
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.
Clamping Screw | ||||||
|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 2 | 0000000 | 000000 |
Zinc-Plated 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 2 | 0000000 | 00000 |
Chrome-Plated 1215 Carbon Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 2 | 0000000 | 00000 |
2024 Aluminum | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 2 | 00000000 | 00000 |
303 Stainless Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 2 | 00000000 | 00000 |
316 Stainless Steel | ||||||
| 2 7/16" | 3 1/2" | 3/4" | Socket Head Screw | 2 | 0000000 | 000000 |
Keyway | Clamping Screw | |||||||
|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | Wd. | Dp. | Type | No. Included | Each | |
Black-Oxide 1215 Carbon Steel | ||||||||
| 2 7/16" | 3 1/2" | 3/4" | 5/8" | 9/32" | Socket Head Screw | 2 | 0000000 | 000000 |
Chrome-Plated 1215 Carbon Steel | ||||||||
| 2 7/16" | 3 1/2" | 3/4" | 5/8" | 9/32" | Socket Head Screw | 2 | 0000000 | 00000 |
303 Stainless Steel | ||||||||
| 2 7/16" | 3 1/2" | 3/4" | 5/8" | 9/32" | Socket Head Screw | 2 | 0000000 | 000000 |
Extra-Grip Clamping Two-Piece Shaft Collars
With larger screws than those found on standard clamping collars, these provide a stronger grip on your shaft without using additional screws. 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 offer some corrosion resistance.
Clamping Screw | ||||||
|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | Type | Number Included | Each | |
Black-Oxide 1026 Carbon Steel | ||||||
| 2 7/16" | 4 1/4" | 1" | Socket Head Screw | 2 | 0000000 | 0000000 |
Set Screw Two-Piece Shaft Collars
Tighten the set screw to bite into an unhardened shaft for a secure hold. 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. Clamping screws provide extra grip.
Carbon steel collars are strong and wear resistant. Their black-oxide finish is somewhat corrosion resistant, but only in dry environments. Their dark color can be useful for matching other parts in your system.
303 stainless steel collars are corrosion resistant and highly machinable.
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.
Flange | Keyway | Clamping Screw | Counterbored Mounting Holes | Unthreaded Mounting Holes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Wd. | OD | Thick. | Wd. | Dp. | Type | No. Included | Mounting Fasteners Included | Thread Size | No. of | Dia. | No. of | Each | |
Black-Oxide 1117 Carbon Steel | |||||||||||||||
| 2 7/16" | 4" | 1 3/8" | 5 23/32" | 1/2" | 5/8" | 9/32" | Socket Head Screw | 2 | No | 3/8"-16 | 3 | 3/8" | 3 | 0000000 | 0000000 |
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 Shaft Dia. | Overall Lg. | OD | Max. Speed, rpm | Max. Torque, in.-lbs. | For Motion Type | Each | |
Cast Iron | |||||||
|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||
| 2 7/16" | 9 7/8" | 6 1/4" | 2,965 | 17,000 | Forward/Reverse, Start/Stop, Continuous | 0000000 | 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.