shop Bottom Track Rollers For D50 D5B D5H D5 Construction Machinery

Heat-treated components provide superior wear resistance in abrasive environments (e.g., gravel, sand, and rocky terrain). Forged roller shell with refined grain structure to withstand heavy static loads (up to 30 tons per roller) and dynamic impacts during operation. Sealing System: Double floating seals (high-chromium alloy, HRC 65–70) to prevent oil leakage and block contaminants (mud, dust, water). Nitrile rubber O-rings with temperature resistance (-40°C to 120°C) for reliable sealing in extreme conditions.