6304DU Sealed Ball Bearing20 x 52 x 15 mm 6304-DU Sealed Ball Bearing, the inner diameter is 20mm, outer diameter is 52mm and the width is 15mm, Bearing is made of Chrome Steel, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease. Item: 6304DU Ball Bearing Type: Deep Groove Ball Bearing Closures: 2 Rubber Seals Lubrication: Self Lubricated (Grease) Dimensions: 20mm x 52mm x 15mm/Metric ID (inner diameter)/Bore: 20mm OD (outer diameter): 52mm Width/Height/thickness: 15mm Size: 20 x 52 x 15 mm Dynamic load rating Cr: 15,900 N Static load rating Cor: 7,900 N Limiting Speed: Grease Lubrication: 10,000 RPM Equal: 6304-2RS & 6304-2RZ Quantity: One Bearing