Jaw Coupling Catalogue

Other Couplings

Jaw Coupling Dimensions

How does Jaw coupling work?

A jaw coupling is a versatile power transmission device used to connect two shafts while ensuring smooth torque transfer. It reduces vibrations and compensates for misalignment, protecting other system components from damage. This type of coupling is composed of three main elements: two metal hubs and an elastomer insert known as the “spider.” The hubs are arranged alternately with the spider, and torque is transmitted through the compression of the elastomer lobes. The elastomer material provides flexibility, dampens vibrations, and allows for small misalignments, ensuring efficient torque transmission while maintaining system stability.

Jaw Type Flexible Coupling Features

Jaw-type coupling elastomers are typically made from engineering plastics or rubber, and their lifespan generally aligns with that of the jaw coupling insert, which is often around 10 years. The elastomer plays a crucial role in damping vibrations, and since it works under pressure, it withstands significant stress without tension. The operating temperature range of the coupling, determined by the elastomer’s performance, is usually between -35°C to +80°C.

Key features include:

1. Compact, backlash-free design with elastomers available in three hardness options.
2. Vibration absorption and misalignment compensation (radial and angular).
3. Simple structure, easy to maintain and inspect.
4. Maintenance-free, oil-resistant, and electrically insulated with an operating range of 20°C to 60°C.
5. Multiple elastomer designs such as four, six, eight, and ten petals.
6. Various fixing methods, including top wire, clamping, and keyway fixation.

Key Components of

a Jaw Coupling

Jaw couplings, also known as jaw and spider couplings, consist of two metal hubs and an elastomeric element. Typically, the hubs are made of 45-gauge steel, though aluminum or stainless steel is used for applications requiring load sensitivity. The elastomer, placed between the hubs, helps connect the two halves, offering benefits like misalignment compensation, vibration damping, and cushioning. This design is compact, easy to maintain, and does not require lubrication. However, replacing the elastomer requires axial movement of the coupling halves.

Pros and Cons of Using Jaw Couplings

When installing or replacing a jaw coupling, it’s essential to weigh the advantages and disadvantages. Jaw couplings are inexpensive and absorb shocks effectively, making them a popular choice for many applications. They are easy to disassemble, and their spiders are interchangeable, reducing maintenance costs. However, they generate noise, making them less suitable for continuous-duty electric motor-driven machines. Jaw couplings also have limited misalignment tolerance and are unsuitable for precision motion control or applications with frequent start-stop reversing.

In addition to jaw couplings, we provide a wide selection of other flexible couplings to suit various industrial and mechanical applications. Our offerings include products designed to accommodate different torque, speed, and alignment requirements, ensuring optimal performance in your operations. With a focus on quality and durability, all of our flexible couplings are engineered for maximum efficiency and minimal maintenance. If you’re interested in exploring our full range of couplings or need expert advice on which solution best suits your machinery, feel free to reach out to us for more information! We’re here to help you find the perfect fit.