Customize the bore of these flexible couplings to align uncommon shaft sizes as well as shafts that have become undersized from wear or oversized from coatings. 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 (all components sold separately). Fasten to your shaft with set screws (not included), which bite into the shaft for a secure hold. If the spider fails, the hubs will lock together, giving you time to shut down your equipment to prevent component damage and replace the spider. These couplings do not need lubrication.

Buna-N spiders are the most commonly used because they damp the most vibration, making them best for forward/reverse and start/stop motion. They resist oil and chemicals.

Polyurethane spiders can run at a higher torque than Buna-N spiders, but do not offer as much vibration damping. Use them for continuous motion. Similar to Buna-N, they resist oil and chemicals.

Hytrel spiders operate at the highest torque, but are less flexible than Buna-N and polyurethane spiders so they have less misalignment and vibration damping capabilities. Use them for continuous motion. Compared to Buna-N and polyurethane, these have the best oil and chemical resistance.

For technical drawings and 3-D models, click on a part number.

Customize the bores of these U-joints to fit the exact dimensions of your shafts. To make drilling easy, they come apart and have a small, centered starter hole on each end. They’re single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. A good choice for most applications, all have a pin-and-block joint that handles higher torque at lower speeds than other joint types, such as those with needle bearings. 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.

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.