Steel roller welded with tube so that roller can support more torque, widely used in heavy duty pallet conveying.Applicable conveyor type: Single sprocket or double sprockets roller conveyorTravel Goods: Carton, pallet etc.Applicable situation: Indoor transportationBearing unit: Punched steel bearing house 6001, 6202, 6204 bearingTube: Welded steel tube GB/T13793-2008 Outer diameter: 50, 60, 76, 80, 89mmShaft: Cold round steel GB/T905-1994 Female thread type diameter12, 15, 20mmDriving part: Steel sprocket 45# (teeth type: GB/T1234-1997) Teeth=11, 14 with 08B chain Teeth=13 with 10A chain Galvanize plated Heavy duty sprocket roller, roller, conveyor roller, sprocket roller