The PC2000 Excavator Track Roller is a heavy-duty aftermarket undercarriage component designed for large Komatsu mining excavators. Also known as a bottom roller or lower roller, it supports the machine’s substantial operating weight and guides the track chain along the lower crawler frame.

Xiamen Doozer manufactures heavy-duty track rollers for large mining excavators with a focus on strength, wear resistance, and dimensional accuracy. The roller body is produced from high-strength steel and processed through precision machining and controlled heat treatment. These processes help improve surface durability and resistance to repeated loading, impact, and abrasive contact with the track chain.

The track roller is a critical part of the complete undercarriage system. It works together with the track chain, front idler, carrier rollers, sprocket, and track shoes to maintain stable crawler movement. When a bottom roller becomes excessively worn, damaged, or develops abnormal movement, it can increase track vibration and accelerate wear on the track chain and other undercarriage components.

The Komatsu PC2000-8 is a mining-class excavator, and Komatsu’s official specification lists eight track rollers and three carrier rollers on each side. Aftermarket parts catalogs identify 21T-30-00550 as a PC2000-8 track roller, while other suppliers list additional roller references for PC2000-8/-11 configurations.

Xiamen Doozer supplies factory-direct aftermarket undercarriage parts for mining contractors, equipment distributors, repair companies, and heavy-equipment parts dealers. For accurate replacement, buyers should provide the machine model, serial number, existing part number, or roller dimensions before ordering.