Specification Brand : DINGGUANGHE-CUP BulletPoint1 : SF-1F oil-free lubrication bearing: Metallographic analysis and material structure BulletPoint2 : 1. Mixture of PTFE and lead 0.01-0.03mm BulletPoint3 : 2. Porous bronze powder 0.2-0.3mm BulletPoint4 : 3. Steel backing 0.7-2.3mm BulletPoint5 : 4. Electroplated coating: thickness of tin coating 0.005mm, or that of copper layer 0.008mm ExternallyAssignedProductIdentifier : 8306040031182 ItemName : DINGGUANGHE-CUP Flanged Bearings SF-1 Oilless Bushing Bearing SF1-3015 SF1-3020 SF1-3030 Self Lubricating Composite Bearings (5Pcs) Industrial Products (Diameter : SF1 3230) ItemPackageQuantity : 1 ItemTypeKeyword : flanged-sleeve-bearings Manufacturer : DINGGUANGHE-US Material : Metal NumberOfItems : 1 PartNumber : DINGGUANGHE-US ProductDescription : Premium Flanged Ball Bearing. Product description SF-1 oil-free lubrication bearing is the rolled sliding bearing based on the matrix of steel plate, with the porous bronze powder sintered in the middle while the mixture of PTFE and lead rolled in the surface. It is with small friction coefficient, wear resistance, good corrosion resistance and oil-free lubrication. The application of such product can reduce the cost, reduce the mechanical volume, avoid the shaft engagement, and lower the noise.