Machine parts; adapter sleeves; bearings; bearings housing; bearings with mounting seats; needle roller bearings; coupled axles; couplers; sprocket; pulley; axle casing; axle seal; axle sleeve (bush); axle box; bow-shaped bearings; oil seal; bushing; industrial bearings; thrust bearings; flanged bearings; plane bearings; roller bearings; bracket bearings; crank bearings; self-lubricating bearings; self-aligning bearings; bearing cages; clutch bearings; water pump bearings; agricultural bearings