1. Professional manuafacuturer 2. Iron base oilless self-lubricating bearing 3. Precision sizing 4 ... powder——Forming——Sintering——Sizing——Oil impregnant——Packing——ShippingFeature1. Chemical composition: iron, carbon, copper, other2. Radial crushing strength: 196-392Mpa 3 ... line and auto deburring6. In-house tooling making: EDM, wire cutting machine7. Strength in machining: Machine center, CNC milling, ...