... .Bearing steel 4.High precision Stud type track roller bearing:with axial guidance, full complement needle roller set, plastic axial plain ... ,6 mm W8 mm Nominal dimension for hexagonal socket m166 g MassMA58 Nm Nut tightening torqueCr w12600 N Effective dynamic load ... )Cur w3200 N Fatigue limit loadnD G1600 1/min Speed (with continuous operation and grease lubrication) NIPA2X7,5 Drive fit lubrication ...