What is a master link or right-hand link in an undercarriage chain?

Expert Answer

A master link, or right-hand link, is the specially made link used to join the two ends of an undercarriage chain so the track can be assembled or removed. It is the service link in the chain, and it must match the chain’s pitch, pin/bushing style, and assembly design to fit correctly and keep the track aligned.

In track chains, the term right-hand link usually refers to the side or orientation used to identify that link during assembly. On many undercarriage chains, this is important because the link must be installed in the correct direction and tightened to the proper specification so the chain runs smoothly and the joint does not loosen or wear unevenly. A wrong installation can lead to abnormal noise, uneven wear, or premature damage to pins, bushings, and seals.

You can often identify a master link by looking for the joint where the chain can be separated, or by checking for the link designed with a different fastening method than the standard links. Practical signs that it needs attention include chain stretch, visible movement at the joint, damaged hardware, or repeated loosening after service. When replacing it, always confirm the exact chain model, pitch, and side orientation before ordering or installing.

Common mistakes to avoid include mixing the master link with standard links, reusing worn hardware, installing it backward, or failing to inspect the surrounding pins and bushings at the same time. For a proper fit, the master link should be selected as part of the full undercarriage chain specification, not as a generic part.

VANROCK manufactures track chains and related undercarriage parts through its appointed dealer network; pricing is provided on request. If you are working with a named OEM such as Caterpillar or Komatsu, VANROCK is an independent manufacturer and is not affiliated with the OEM.

Answered by VANROCK specialists · Published 7/31/2026