Machinable-Bore Double U-Joints
Drill custom bore sizes to connect shafts that are either parallel to each other or are misaligned at an angle. These double U-joints come apart and have a small, centered hole on each end to make drilling easy. Besides transferring torque, they keep parallel shafts moving in sync by making the output shaft move at the same rate as the input shaft. 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, they’re strong and handle a good amount of torque.
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). 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.
For technical drawings and 3-D models, click on a part number.
Torque | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
For Max. Shaft Dia. | For Max. Shaft Dp. | Joint Dia. | Overall Lg. | Max. Operating Angle | Max. Speed, rpm | Max. Torque, in.-lbs. | 3° Operating Angle | 10° Operating Angle | Parallel Misalignment Capability | Joint Type | Each | |
Steel | ||||||||||||
3/8" | 5/8" | 1/2" | 4" | 25° | 1,750 | 375 | 150 in.-lbs. @ 300 rpm | 51 in.-lbs. @ 300 rpm | 0.845" | Pin and Block | 0000000 | 0000000 |
1/2" | 11/16" | 5/8" | 4 1/2" | 25° | 1,750 | 540 | 245 in.-lbs. @ 300 rpm | 83 in.-lbs. @ 300 rpm | 0.951" | Pin and Block | 0000000 | 000000 |
5/8" | 7/8" | 3/4" | 5 3/8" | 25° | 1,750 | 765 | 330 in.-lbs. @ 300 rpm | 110 in.-lbs. @ 300 rpm | 1.133" | Pin and Block | 0000000 | 000000 |
3/4" | 1" | 1" | 6 3/4" | 25° | 1,750 | 1,560 | 595 in.-lbs. @ 300 rpm | 200 in.-lbs. @ 300 rpm | 1.428" | Pin and Block | 0000000 | 000000 |
1" | 1 1/16" | 1 1/4" | 7 1/2" | 25° | 1,750 | 5,220 | 980 in.-lbs. @ 300 rpm | 330 in.-lbs. @ 300 rpm | 1.585" | Pin and Block | 0000000 | 000000 |
1 1/8" | 1 3/16" | 1 1/2" | 8 1/2" | 25° | 1,750 | 7,920 | 1,425 in.-lbs. @ 300 rpm | 480 in.-lbs. @ 300 rpm | 1.796" | Pin and Block | 0000000 | 000000 |