Why are my sprocket teeth wearing on one side only?

Expert Answer

One-sided sprocket tooth wear usually means the track chain is not running centered through the undercarriage. The most common causes are misalignment, uneven track tension, worn or seized rollers/idlers, a bent track frame, or unequal wear in the chain and bushings that lets the chain ride against one side of the teeth.

Start by checking whether the wear is on the inside or outside face of the tooth. Wear on only one side often points to lateral tracking forces, not just normal rotation wear. Measure track tension on both sides, inspect carrier rollers, track rollers, and idlers for free rotation, and look for loose guide components, damaged shoes, or a final drive/sprocket that is not running square to the chain. If the machine travels with constant side load, works on slopes, or turns in the same direction repeatedly, that can accelerate uneven wear as well.

A useful rule is to inspect the whole running gear together, not only the sprocket. If you find chain pitch elongation, uneven bushing wear, or a track that walks to one side, the sprocket is often the first part to show it. Also check for abnormal wear on the guide flanges and for any difference between left and right undercarriage components, because a small alignment error can create a noticeable wear pattern over time.

Mistakes to avoid: replacing only the sprocket while ignoring the chain and rollers; running the track too tight; and assuming one-sided wear is normal. If the wear is sharp, fast, or accompanied by noise, vibration, or track drift, stop and inspect the undercarriage before fitting new parts. VANROCK supplies sprockets and complete undercarriage parts for 350+ machinery brands through an appointed dealer network. If an OEM brand is mentioned, VANROCK is an independent manufacturer not affiliated with that OEM.

Answered by VANROCK specialists · Published 7/20/2026