Jaw coupling inserts

Jaw coupling inserts, also called spiders, are elastic elements working between the jaws of two hubs. They transmit torque, damp vibrations and are the first to wear out, which is why they are the most frequently purchased coupling spare part.

Jaw coupling inserts - spider hardness indicated by colour

Replacing the spider takes little time and restores the coupling's performance without buying new hubs. The insert colour indicates its hardness, so you can match the coupling to the drive's operation: a harder insert transmits higher torque with less hub twist, and a softer one damps vibrations and shocks better.

Yellow, red, black and green jaw coupling spiders

Jaw coupling spiders in yellow, red and black versions, and in a selected size also green. The insert size is given in the product name - it must be the same as the coupling size.

How to choose a spider when replacing it in a jaw coupling - questions and answers

Which insert should I choose as a replacement?

The simplest option is to use an insert of the same size and colour as the previous one - the drive will then keep the same characteristics.