Material of CEMA standard conveyor roller 1.Rubber Roller idlers Dia 60mm-219mm, length 190-3500mm, which are used in the steel industry, harbor, coal industry, power industry, cement industry, etc. 2.Shaft: 45# STEEL equal to C45, or as request. 3.Bearing: Single & Double Row Deep Groove Ball Bearing 2RZ&2Z with C3 clearance, the brand …Web