The High Quality Komatsu D80 Bulldozer Single Flange Track Roller (also known as bottom roller or lower roller) is a precision-engineered undercarriage component designed specifically for Komatsu D80 series and compatible crawler bulldozers. As a critical load-bearing element of the undercarriage system, the track roller supports the machine’s operating weight, distributes load evenly across the track chain, and ensures smooth, stable travel across construction sites, mining operations, and heavy earthmoving projects.

Manufactured from premium-grade 50Mn or 40MnB alloy steel through precision forging and CNC machining processes, this single flange track roller delivers exceptional structural integrity and impact resistance. The roller surface undergoes advanced induction hardening and heat treatment, achieving a surface hardness of HRC 52-60 with a hardening depth of 8-12mm. This deep, uniform hardened layer ensures outstanding wear resistance and extended service life, while the core maintains internal ductility to withstand heavy shock loads without cracking.

The track roller features advanced floating oil seal technology crafted from high-chromium and high-molybdenum alloy, providing maintenance-free operation by effectively preventing ingress of mud, sand, water, and abrasive fines. The O-ring is produced from the copolymerization of butylene and acrylonitrile, offering superior oil resistance and high-temperature resistance. Available in black, yellow, or customized colors, the roller is designed for quick and easy bolt-on installation with OEM-spec mounting dimensions, minimizing machine downtime.

Engineered for the Komatsu D80 series—an 80-90 horsepower class bulldozer commonly found in D80A-12, D80A-18, D80E-18, and D80P-18 variants—this single flange track roller delivers the durability and performance needed for the most demanding dozer applications