... material: 42CrMo, 42CrMo4V or 50Mn 4) Clearance: C1, C2, C0, C3, C4 5) Packing: Standard export packing2. Four-point contact ball slewing bearings ... , E 3) Raw material: 42CrMo, 42CrMo4V or 50Mn 4) Clearance: C1, C2, C0, C3, C4 5) Packing: Standard export packing Double Row Crane Slewing Ring Bearing