China Wholesale High Quality high quality carrying conveyor roller Detailed conveyor roller feature:  1.Roller idlers Dia 50mm-219mm, length 190-3400mm, which are used in the steel industry, harbor, coal industry, power industry, cement industry, etc 2.Tube: Q235 3.Shaft: 45# STEEL 4.Bearing: Single & Double Row Deep Groove Ball Bearing 2RZ&2Z with C3 clearance. 5.Seals: Grease retaining inner seal with Multi-stage Labyrinth and Retention Cap with Outboard Rubbing Flinger Seal. 6. Lubrication: Grease is Lithium soap type grease with Rust Inhibitors. 7. Welding: Mixed gas shielded arc welding end 8. Painting: ordinary painting, hot galvanized painting, electric static spraying painting, baked painting Besides we can manufacture the rollers and idlers according to the buyers' requirements Standard: GB, ISO, CEMA, DIN, JIS, ETC Production capacity: as usual 5000 pieces/ week, but urgent order is acceptable  Advantage: The life time: more than 30000 hours Samples for testing are available. The more relaxed payment terms       Carrying troughing conveyor roller in machinery For more details,please inquiry us!