Jaw and Spider Couplings
Jaw & Spider (or Jaw-Type) couplings are a common type of shaft coupling in the industry. They are designed to transmit torque and rotation between two shafts, accept shaft misalignment, and help protect components from damage by damping shock and vibrations. Jaw type couplings feature two aluminum alloy hubs with protruding lugs known as “jaws,” and a polyurethane elastomer insert known as a “spider” that fits between the hubs.
Polyurethane elastomer spiders offer a high load capacity while maintaining a damping effect on vibration and thermal conductivity. The elastomer material provides good resistance to oils and chemicals, as well as electric isolation between both shafts. Our couplings have different torque ratings and performance levels determined by the hardness (durometer) of the elastomer spider, making them adaptable for a wide range of mechanical applications. The profile of the jaw and the spider will also impact performance. We offer a Curved-Jaw profile for zero-backlash and high torsional stiffness for high performance in servo and stepper motor driven applications. A more cost-effective Straight-Jaw type is also available for less exacting requirements.
Miki Pulley offers Jaw & Spider couplings with a pilot bore (minimum bore), or a bored-to-size option. Hubs have shaft connection options including keyway / set-screw-style, clamp-style, or an integrated shrink disc-style. There are three different durometer Curved-Jaw elastomer spider options. Request a quote today or contact us for assistance choosing the correct coupling for your performance requirement.