Precision Excavator Undercarriage Parts EC55 EC460 VOLVO Mini Track Roller

Roller body: HRC 56–62 (depth: 8–12 mm)

Shaft: HRC 52–58 (depth: 5–8 mm)

Achieved via medium-frequency induction quenching.

Double-conical floating seals made of high-chromium molybdenum alloy (HRC 65–72), ensuring zero oil leakage under extreme conditions .

Nitrile O-rings for oil and temperature resistance (-45°C to 120°C) .

Forged from premium steel billets, followed by CNC machining to tight tolerances (±0.05 mm) .

Heat-treated to enhance core toughness while maintaining surface hardness.