Sprockets & Segments
drive sprockets · sprocket segments · segment groups · rims
VANROCK supplies one-piece drive sprockets for excavators and bolt-on segment groups for bulldozers, with induction-hardened teeth cut to the OEM profile.
Tooth counts and bolt patterns follow the machine specification. Select your brand below to see the sprockets and segments listed per model.
4,942 Sprockets & Segments catalogued across 50 machinery brands
SegmentsComponent_Knowledge
Technical guide
01
Function & position
The sprocket engages the chain bushings and transfers the drive power from the final drive to the track. It mounts around the drive hub and only drives the chain — it carries none of the machine weight.
Because it meshes with the chain on every revolution, the sprocket is a precise mirror of chain condition: whatever happens to the chain pitch shows up in the sprocket teeth first.
02
Sprockets vs. segments
A sprocket is a one-piece toothed ring with bolt holes or a press hub, used mainly on excavators. Segment groups consist of several bolted segments that together form the sprocket ring — standard on bulldozers, because individual segments can be replaced without splitting the track chain.
03
Construction
Cast or precision-forged and machined, with induction-hardened teeth: a hard wear surface over a tough core prevents both rapid wear and brittle cracking. Steel with too little carbon becomes brittle in hardening, and a tooth hardened only at the skin wears through quickly — which is why the hardening depth matters as much as the hardness number. Sand notches in the tooth base limit wear from packed soil.
04
Replacement strategy
A sharp sprocket with seemingly healthy links is a warning, not a coincidence: teeth only sharpen when the chain pitch has already elongated. On dry chains, sprocket and chain must therefore always be replaced together — a new sprocket on a stretched chain (or the reverse) wears out in a fraction of its normal life.
On oil-lubricated dozer chains, segments wear in the cup between the teeth. As long as the chain does not leak, replacing segments before the end of their cycle buys the whole undercarriage several hundred additional operating hours.
05 · Component_Knowledge
Recognizing wear
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Undercarriage_Knowledge
Expert guides from our engineers
FAQ
Sprockets & Segments — common questions
When should I replace the sprocket?+
Replace the sprocket when teeth show visible sharpening, hooking or tip wear — and always consider replacing it together with a new chain, since a worn sprocket destroys new bushings within hundreds of hours.
Sprocket vs segment group — which does my machine use?+
Most excavators use a one-piece bolt-on sprocket; most dozers use segmented rims (segment groups) that can be replaced without breaking the chain. Your model page lists the exact configuration.
How much does a sprocket or segment set cost?+
Prices depend on machine size and tooth count. Request a quote on the part page for your model and receive direct manufacturer pricing.
Are the teeth hardened?+
Yes — every VANROCK sprocket and segment has deep induction-hardened teeth with controlled hardness gradients, cut to OEM profile for exact chain engagement.