Single U-Joints


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 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 U-joints are strong and handle more torque than zinc U-joints.
U-joints for keyed shafts connect to shafts with set screws. Unlike U-joints that use spring pins, there’s no drilling required.
For technical drawings and 3-D models, click on a part number.
For Shaft | Torque | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Speed, rpm | Max. Torque, in.-lbs. | 3° Operating Angle | 10° Operating Angle | Shaft Mount Type | Each | |
Pin-and-Block Joint | |||||||||||
Steel—For Keyed Shafts | |||||||||||
3/8" × 1/4" | 15/16" | 3/4" | 2 11/16" | 45° | 1,000 | 1,250 | 336 in.-lbs. @ 300 rpm | 101 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 0000000 |
1/2" × 3/8" | 1 3/16" | 1" | 3 3/8" | 45° | 1,000 | 2,250 | 608 in.-lbs. @ 300 rpm | 183 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
5/8" × 1/2" | 1 1/4" | 1 1/4" | 3 3/4" | 45° | 1,000 | 5,200 | 942 in.-lbs. @ 300 rpm | 282 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
3/4" × 1/2" | 1 3/8" | 1 1/2" | 4 1/4" | 45° | 1,000 | 10,000 | 1,453 in.-lbs. @ 300 rpm | 436 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
3/4" × 5/8" | 1 3/8" | 1 1/2" | 4 1/4" | 45° | 1,000 | 10,000 | 1,453 in.-lbs. @ 300 rpm | 436 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
1" × 1/2" | 1 5/8" | 1 3/4" | 5" | 45° | 1,000 | 14,500 | 2,002 in.-lbs. @ 300 rpm | 601 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
1" × 5/8" | 1 5/8" | 1 3/4" | 5" | 45° | 1,000 | 14,500 | 2,002 in.-lbs. @ 300 rpm | 601 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
1" × 3/4" | 1 5/8" | 1 3/4" | 5" | 45° | 1,000 | 14,500 | 2,002 in.-lbs. @ 300 rpm | 601 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 000000 |
1 1/4" × 1" | 2 1/16" | 2 1/2" | 7" | 45° | 1,000 | 32,000 | 3,964 in.-lbs. @ 300 rpm | 1,189 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 00000000 |
1 1/4" × 1 1/8" | 2 1/16" | 2 1/2" | 7" | 45° | 1,000 | 32,000 | 3,964 in.-lbs. @ 300 rpm | 1,189 in.-lbs. @ 300 rpm | Set Screw | 00000000 | 00000000 |