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.

A complete coupling consists of two hubs and one spider, or two hubs, one split spider, and one retaining ring (all components sold separately). Split spiders are easier to install and replace than standard spiders because there’s no need for tools or removing your hubs. Twist-lock them in place using a retaining ring.

Buna-N spiders provide good vibration damping and chemical resistance. Hytrel spiders provide fair vibration damping and excellent chemical resistance. Polyurethane spiders and split spiders provide fair vibration damping and good chemical resistance.

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

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.

Also known as Schmidt couplings, these handle higher angular misalignment than other three-piece couplings. Good for applications with varying shaft misalignment, they're commonly used with conveyor rollers and roller feeds in printing and packaging machines. Couplings clamp evenly around the shaft for a mar-free hold. Tighten the clamping screws to secure. They allow zero backlash (no play) and never need lubrication.

A complete coupling consists of two hubs and one disc (each component sold separately). Hubs are aluminum for light weight and good corrosion resistance.

Hubs for 1/2" shaft dia. and above have a keyway. Hubs for metric sizes do not have a keyway (unless noted).

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