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Shaft Diameter
OD
Construction
For Rotary Motion
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Shaft Mount Type
Set Screw Material
Number of Set Screws Included
Maximum Rotation Speed
Performance
Export Control Classification Number (ECCN)
DFARS Specialty Metals
Spider Couplings
 |
With two hubs gripping a rubbery spider in the center, these couplings damp vibration and transfer torque while flexing to handle misaligned shafts. The metal hubs never touch each other, so there's no need for lubrication. Also known as Lovejoy® couplings. For a complete coupling, select two hubs and one spider or two hubs, one split spider, and one retaining ring. Choose components with the same trade size to ensure they'll fit together.
Spiders
 |
A flexible center fits between hubs to enable torque transfer and damp vibration.
Buna-N—Highly tear resistant and the best choice to absorb vibration and shock.
Polyurethane Rubber—Resist tearing better than Buna-N and provide a balance of stiffness and moderate vibration damping.
Hytrel—Stiffer than Buna-N, these spiders transmit torque from one shaft to the other almost fully but offer minimal vibration damping.
Misalignment Capability | |||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hub OD | Shaft Coupling Trade Size | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Each | |||
Buna-N | |||||||||
| 2 17/32", 2 35/64", 65 mm | L099, L100 | 7,000 | 315 | 0.015" | 1° | 6408K77 | 000000 | ||
| 3 21/64", 85 mm | L110 | 5,000 | 790 | 0.015" | 1° | 6408K79 | 00000 | ||
| 3 3/4", 96 mm | L150 | 5,000 | 1,240 | 0.015" | 1° | 6408K81 | 00000 | ||
Polyurethane Rubber | |||||||||
| 2 17/32", 2 35/64" | L099, L100 | 3,600 | 475 | 0.015" | 1° | 2410K15 | 00000 | ||
| 3 21/64" | L110 | 3,600 | 1,185 | 0.015" | 1° | 2410K17 | 000000 | ||
| 3 3/4" | L150 | 3,600 | 1,860 | 0.015" | 1° | 2410K19 | 000000 | ||
Hytrel | |||||||||
| 2 17/32", 2 35/64", 65 mm | L099, L100 | 3,600 | 790 | 0.015" | 0.5° | 6408K96 | 000000 | ||
| 3 21/64", 85 mm | L110 | 3,600 | 2,265 | 0.015" | 0.5° | 6408K97 | 000000 | ||
| 3 3/4", 96 mm | L150 | 3,600 | 3,705 | 0.015" | 0.5° | 6408K98 | 000000 | ||
Split Spiders
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Unlike standard spiders, you can install these without using tools, removing hubs, or realigning shafts. Hold them in place with a retaining ring.
Polyurethane Rubber—Provide fair vibration damping and tear resistance.
High-Misalignment Tire Couplings
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With a large, flexible rubber tire, these withstand the highest misalignment of any coupling while reducing vibration. For a complete coupling, select two hubs, one tire, and two bushings. Choose components of the same trade size to ensure they'll fit together.
Hubs
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The metal body mounts onto shafts to transmit torque from one shaft to the other through the flexible center.
Iron and Steel Hub—Best for dry environments, since moisture will cause these hubs to rust.
Clamp-On Shaft Mount—Grip shafts evenly without marring them and hold tighter than set screws. Tighten the clamping screws to secure.
Tires
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Fit these highly flexible rubber tires over the two hubs. They transmit torque, compensate for misalignment, and isolate shock and vibration.
Buna-N—Highly tear resistant.
Misalignment Capability | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
For Hub OD | Shaft Coupling Trade Size | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Axial | Each | |||
Buna-N | ||||||||||
| 5 1/4" | L095 | 4,500 | 900 | 0.125" | 4° | 0.313" | 6241K21 | 000000 | ||
| 6 1/2" | L100 | 4,000 | 1,800 | 0.125" | 4° | 0.313" | 6241K22 | 00000 | ||
| 7 3/8" | L110 | 3,600 | 2,200 | 0.125" | 4° | 0.313" | 6241K23 | 000000 | ||
| 8 5/16" | L150 | 3,100 | 3,600 | 0.125" | 4° | 0.313" | 6241K24 | 000000 | ||
| 9 1/4" | L190 | 2,800 | 4,350 | 0.125" | 4° | 0.313" | 6241K25 | 000000 | ||
Clamping Rigid Shaft Couplings
Steel
 |  |
For Keyed Shafts | For Round Shafts |
For Shaft Dia. | Overall Lg. | OD | Max. Rotation Speed, rpm | Max. Torque, in·lbf | For Rotary Motion | Each | |||
|---|---|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||||
| 1 3/16" × 1 3/16" | 3 1/4" | 2 1/16" | 4,000 | 5,000 | Forward/Reverse, Start/Stop, Continuous | 61005K95 | 0000000 | ||
For Round Shafts | |||||||||
| 1 3/16" × 1" | 3 1/4" | 2 1/16" | 4,000 | 5,000 | Forward/Reverse, Start/Stop, Continuous | 61005K85 | 000000 | ||
| 1 3/16" × 1 3/16" | 3 1/4" | 2 1/16" | 4,000 | 5,000 | Forward/Reverse, Start/Stop, Continuous | 61005K84 | 000000 | ||
303 Stainless Steel
|
For Keyed Shafts |
Stainless steel couplings have excellent corrosion resistance.
For Shaft Dia. | Overall Lg. | OD | Max. Rotation Speed, rpm | Max. Torque, in·lbf | For Rotary Motion | Each | |||
|---|---|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||||
| 1 3/16" × 1 3/16" | 3 1/4" | 2 1/16" | 4,000 | 3,200 | Forward/Reverse, Start/Stop, Continuous | 61005K7 | 0000000 | ||
Two-Piece Rigid Shaft Coupling Bridges
Cast Iron
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For Shaft Dia. | Overall Lg. | OD | Max. Rotation Speed, rpm | Max. Torque, in·lbf | For Rotary Motion | Each | |||
|---|---|---|---|---|---|---|---|---|---|
For Keyed Shafts | |||||||||
| 1 3/16" | 6 1/4" | 4 1/4" | 5,360 | 2,000 | Forward/Reverse, Start/Stop, Continuous | 6417K11 | 0000000 | ||
Two-Piece Shaft Collars
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For Round Shafts |
 |
For Keyed Shafts |
Attach these collars anywhere along your shaft, which helps when other components are already installed or you can't access the end. They clamp firmly and evenly without marring the shaft, so you can reposition or remove collars later.
Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.
Chrome-Plated Carbon Steel—Resist moisture and mild cleaning solutions better than zinc-plated collars.
303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.
316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.
Aluminum—One-third the weight of steel and corrosion resistant.
For Round Shafts | For Keyed Shafts | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Clamping Screw | Keyway | |||||||||||
For Shaft Dia. | OD | Wd. | Type | No. Included | Each | Wd. | Dp. | Each | ||||
Black-Oxide Carbon Steel | ||||||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 2 | 6436K48 | 000000 | 1/4" | 1/8" | 3357K31 | 000000 | ||
Zinc-Plated Carbon Steel | ||||||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 2 | 2380K29 | 00000 | — | — | ——— | 0 | ||
Chrome-Plated Carbon Steel | ||||||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 2 | 3370K76 | 00000 | — | — | ——— | 0 | ||
303 Stainless Steel | ||||||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 2 | 6436K94 | 00000 | 1/4" | 1/8" | 3329K31 | 00000 | ||
316 Stainless Steel | ||||||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 2 | 9633T23 | 00000 | — | — | ——— | 0 | ||
Aluminum | ||||||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 2 | 6436K144 | 00000 | — | — | ——— | 0 | ||
Oversized Two-Piece Shaft Collars
 |
For Round Shafts |
Clamping Screw | For Round Shafts | |||||||
|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |||
Black-Oxide Carbon Steel | ||||||||
| 1 3/16" | 2 3/8" | 5/8" | Socket Head | 2 | 8386K47 | 000000 | ||
Bearing Adapter Sleeves
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Inch
Adapter Sleeve Trade Number | For Shaft Dia. | ID | Wd. | Includes | Each | |||
|---|---|---|---|---|---|---|---|---|
Low-Carbon Steel | ||||||||
| SNW-07 | 1 3/16" | 1 3/16" | 1.449" | Lock Nut, Lock Washer | 4449N28 | 000000 | ||
Corrosion-Resistant Mil. Spec. Machinable-Bore Single U-Joints
 |  |
Made to meet strict military standards for material and construction, these stainless steel U-joints also balance strength with good corrosion resistance. Customize their bores until they fit your shafts. They come apart and have a small, centered starter hole on each end to make drilling easy. Because they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications.
Drill holes through the U-joint and your shafts and then connect using spring pins.
Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
Ball-Spring Oil Fitting—U-joints with a ball-spring oil fitting keep lubricant in the joint.
Torque | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Max. Shaft Dia. | For Max. Shaft Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Rotation Speed, rpm | Max. Torque, in·lbf | 3° Operating Angle | 10° Operating Angle | Joint Type | For Shaft Type | Includes | Mil. Spec. | Each | |||
303 Stainless Steel | ||||||||||||||||
| 1 3/16" | 1 5/8" | 2" | 5 7/16" | 35° | 1,500 | 15,500 | 2,980 in·lbf @ 300 rpm | 1,935 in·lbf @ 300 rpm | Pin and Block | Round | Ball-Spring Oil Fitting | MIL-U-20625 Class C | 2457K21 | 0000000 | ||
Set Screw Shaft Collars
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Set Screw | ||||||||
|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |||
Black-Oxide Carbon Steel | ||||||||
| 1 3/16" | 2" | 11/16" | Hex Socket | 1 | 9414T23 | 00000 | ||
Zinc-Plated Carbon Steel | ||||||||
| 1 3/16" | 2" | 11/16" | Hex Socket | 1 | 6432K28 | 0000 | ||
303 Stainless Steel | ||||||||
| 1 3/16" | 2" | 11/16" | Hex Socket | 1 | 6462K28 | 00000 | ||
316 Stainless Steel | ||||||||
| 1 3/16" | 2" | 11/16" | Hex Socket | 1 | 9943K33 | 00000 | ||
Aluminum | ||||||||
| 1 3/16" | 2" | 11/16" | Hex Socket | 1 | 9946K27 | 00000 | ||
Mil. Spec. Machinable-Bore Single U-Joints
| |
Drill the bores to create custom U-joints that meet strict military standards for material and construction. These U-joints come apart and have a small, centered starter hole on each end to make drilling easy. Because they’re single U-joints, they connect and transfer torque between two shafts that are misaligned at an angle. They have a pin-and-block joint, so they handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. Made of steel with hardened yoke ears for added strength and durability, they handle a good amount of torque.
Drill holes through the U-joint and your shafts and then connect using spring pins. They have a ball-spring oil fitting to keep lubricant in the joint.
Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
Torque | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Max. Shaft Dia. | For Max. Shaft Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Rotation Speed, rpm | Max. Torque, in·lbf | 3° Operating Angle | 10° Operating Angle | Joint Type | For Shaft Type | Includes | Mil. Spec. | Each | |||
Steel | ||||||||||||||||
| 1 3/16" | 1 5/8" | 2" | 5 7/16" | 35° | 1,500 | 22,000 | 4,230 in·lbf @ 300 rpm | 2,750 in·lbf @ 300 rpm | Pin and Block | Round | Ball-Spring Oil Fitting | MIL-DTL-20625 Class A | 2456K21 | 0000000 | ||
Oversized Shaft Collars
 |
Clamping Screw | ||||||||
|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |||
Black-Oxide Carbon Steel | ||||||||
| 1 3/16" | 2 3/8" | 5/8" | Socket Head | 1 | 9951K47 | 000000 | ||
Single U-Joints
 |
Pin-and-Block Joint |
 |
Pin-and-Block Joint |
Connect and transfer torque between two shafts that are misaligned at an angle. Your shafts’ misalignment will affect the speed and torque these U-joints will be able to transmit. The more the shafts are misaligned, the less speed and torque they’ll be able to transmit.
Pin-and-Block Joint—Pin-and-block U-joints handle higher torque at lower speeds than other joint types such as those with needle bearings, making them a good choice for most applications. To extend their life by keeping lubricant in and contaminants out, use the grooves on their body to add a cover (sometimes called bellows or boots).
Steel—Steel U-joints are strong and handle more torque than zinc alloy U-joints.
For Keyed Shafts—U-joints for keyed shafts connect to shafts with set screws. Unlike U-joints that use spring pins, there’s no drilling required.
For Shaft | Torque | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Rotation Speed, rpm | Max. Torque, in·lbf | 3° Operating Angle | 10° Operating Angle | Shaft Mount Type | Each | |||
Pin-and-Block Joint | |||||||||||||
Steel—For Keyed Shafts | |||||||||||||
| 1 3/16" | 1 1/2" | 2" | 5 7/16" | 25° | 1,750 | 15,600 | 2,635 in·lbf @ 300 rpm | 885 in·lbf @ 300 rpm | Set Screw | 8285K31 | 0000000 | ||
Plastic Two-Piece Shaft Collars
Set Screw Two-Piece Shaft Collars
 |
Attach these traditional collars anywhere along a shaft when other components are already installed or you can't access the ends. Their set screw digs into the shaft for a tight, permanent hold, but one that leaves a gouge. For maximum holding power, make sure the set screw is harder than the shaft.
Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.
303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.
Chain and Belt Torque Limiters
 |  |  |
Torque Limiter Shown with Sprocket | Replacement Friction Lining |
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 lining is between the hub and pressure plate.
Double Spring—Double-spring limiters have a second spring for handling nearly twice the torque of single-spring limiters.
Sprockets—Sprockets are designed specifically to fit their corresponding limiters. These hubless sprockets are not interchangeable.
Torque Limiters | Sprockets | Replacement Friction Lining | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Keyway | Torque, ft·lbf | |||||||||||||||||
For Shaft Dia. | OD | Overall Wd. | Wd. | Dp. | For Max. Sprocket or Pulley Wd. | Friction Lining Thk. | Min. | Max. | Hub Material | Each | Choose a Roller Chain Trade Number | Each | Each | |||||
Single Spring | ||||||||||||||||||
| 1 3/16" | 5" | 2 7/8" | 1/4" | 1/8" | 5/8" | 1/8" | 90 | 250 | Steel | 6524K153 | 0000000 | 40, 41, 50, 60, 80 | 6525K15 | 000000 | 6525K66 | 000000 | ||
Double Spring | ||||||||||||||||||
| 1 3/16" | 5" | 2 7/8" | 1/4" | 1/8" | 5/8" | 1/8" | 120 | 400 | Steel | 6524K453 | 000000 | 40, 41, 50, 60, 80 | 6525K15 | 00000 | 6525K66 | 00000 | ||
Shaft Collars
 |
Clamping Screw | ||||||||
|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | OD | Wd. | Type | No. Included | Each | |||
Black-Oxide Carbon Steel | ||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 1 | 6435K49 | 00000 | ||
Zinc-Plated Carbon Steel | ||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 1 | 9961K29 | 00000 | ||
303 Stainless Steel | ||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 1 | 6435K55 | 00000 | ||
316 Stainless Steel | ||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 1 | 9421T19 | 00000 | ||
Aluminum | ||||||||
| 1 3/16" | 2 1/16" | 1/2" | Socket Head | 1 | 6157K27 | 00000 | ||
