What are the parts of an excavator undercarriage called?

Expert_Answer

The main undercarriage components are: the track chain (links, pins and bushings that form the loop), track shoes (the plates bolted to the chain that contact the ground), bottom rollers (also called track rollers, which carry the machine's weight on the chain), carrier rollers (top rollers that support the chain's upper run), the front idler (the large wheel at the front that guides the chain), the sprocket (the toothed drive wheel at the rear), and the track adjuster with recoil spring (which sets track tension). A chain fitted with shoes is sold as a complete track group. VANROCK catalogues all of these per machine model, so you can identify each part by name and request pricing.

Answered by VANROCK specialists · Published 7/25/2026