Excavator sprockets are small compared with the machine, but one wrong sprocket can stop an undercarriage repair. Buyers should not confirm sprockets by machine model alone, because chain pitch, tooth count, wear condition and serial range can change the correct part.
Before ordering excavator sprockets, buyers should confirm machine brand, model, serial number, sprocket teeth count, chain pitch, track chain link count, old sprocket photos, idler position, roller condition and whether the buyer wants OEM, aftermarket, used or rebuilt parts.
Buyer Summary: This PRIMA guide explains how importers and repair buyers should check excavator sprocket teeth count, chain pitch and undercarriage fitment before ordering from China. The safest workflow is model + serial + old part photos + measurements + shipment evidence.
This article supports PRIMA’s excavator undercarriage parts buyer guide, spare parts fitment checklist and track roller fitment guide.
Why does sprocket teeth count matter?
Sprocket teeth count matters because the sprocket must engage the track chain correctly. If tooth count, chain pitch or chain condition does not match, the undercarriage can wear quickly or the part may not work on the machine.
A buyer may know the excavator model and still order the wrong sprocket if the old part evidence is missing. The safest first step is to mark one tooth, count around once, photograph the old sprocket, and compare the chain pitch and link count.
| Check | Buyer Evidence | Risk If Missing |
|---|---|---|
| Teeth count | Marked sprocket photo and count. | Wrong sprocket engagement. |
| Chain pitch | Measurement photo or old chain data. | Fast wear or unusable part. |
| Link count | Track chain link count per side. | Configuration mismatch, similar to 53-link vs 51-link errors. |
What evidence should buyers send before quotation?
Before quotation, buyers should send machine brand, model, serial number, sprocket photos from both sides, tooth count, chain photos, track chain link count, idler position, roller condition and required quantity per side.
The same model family can have different undercarriage configurations. This is why PRIMA should not quote only from a short message such as “need sprocket for CAT excavator.” A better inquiry includes serial plate, old part photos and measurements.
Why is model name alone not enough?
Model name is only the starting point. Serial range, old part photos, sprocket teeth count, chain pitch and related undercarriage condition are needed to reduce wrong-part risk.
One real-world fitment lesson is the 53-link versus 51-link track chain problem. The parts can look close in a quotation, but the wrong link count usually means the customer cannot use the product. Sprockets carry the same type of risk when tooth count and pitch are not confirmed.
Should sprocket, chain and rollers be checked together?
Yes. Sprocket, chain, idler and rollers should be checked as one undercarriage system. A new sprocket can wear quickly if the track chain or bushings are already badly worn.
Evidence Table
| Claim | Evidence | How To Verify |
|---|---|---|
| Sprocket fits the machine. | Serial plate, teeth count, old part photos. | Compare with fitment database and measurements. |
| Chain condition is compatible. | Chain pitch, link count, bushing wear photos. | Check whether replacement should include chain. |
| Shipment matches quotation. | Actual photos, packing photos, warranty terms. | Match quantity, part type and packing list. |
What should be verified before shipment?
Before shipment, buyers should verify actual sprocket photos, tooth count close-ups, packing photos, quantity per side, written warranty terms and any inspection note or video available for the order.
Most original parts can carry a one-year warranty, while some consumable items may have shorter terms. The warranty should be written clearly before shipment, especially when comparing OEM, aftermarket, used and rebuilt options.
Buyer FAQ
Can PRIMA supply sprockets for CAT, SANY, Volvo and XCMG?
PRIMA has stronger advantages around CAT, SANY, Volvo and XCMG, while Komatsu, Hitachi and other mainstream brands can also be checked by buyer request.
Should buyers send photos of the old sprocket?
Yes. Old sprocket photos are one of the simplest ways to reduce fitment risk before quotation.
Is the cheapest sprocket always the best choice?
No. Buyers should compare price with fitment evidence, quality grade, warranty, shipment evidence and the condition of the rest of the undercarriage.
Conclusion
Excavator sprocket orders should be confirmed by teeth count, chain pitch, serial range and old part evidence before price comparison. Use this guide with PRIMA’s excavator spare parts fitment checklist and undercarriage parts buyer guide.