Hign-concerned Chemical : None Surface Roughness : Ra 0.05 Torque Capacity : 12x28x8mm Structure : ECCENTRIC Model Number : 6001 2RS 12*28*8 mm Coatings : NICKEL Material : STEEL Brand Name : FUSHI Origin : Mainland China Certification : RoHS,None Special Structure Bearings For Electric Power Tools Electric power tools' long-term performance and maintenance free are important and critical since the repair is costly and not convenient. Consequently, long bearing life is a key requirement. Low operating temperature, high quality raw material, adequate lubrication and avoiding contamination are important factors in extending bearing service life. Dimension Item:6001-2RS Type: Deep Groove Ball Bearing Closures: 2 Sealeds Lubrication: Grease Dimensions: 12x28x8 mm ID (inner diameter): 12 mm OD (outer diameter): 28 mm Width: 8 mm Quantity: 10 Bearings Application F A Q 1.WHY DO THE BEARINGS I RECEIVE HAVE SHAKING? The clearance of the bearing is related to the play. The default is the standard C0 clearance, which is usually 3-18um. The corresponding principle is shown in the figure below. If you don't need to shake, please choose C2 small clearance bearing, If you have any questions, please contact us before purchasing. 2.WHAT IS THE ACCURACY OF ABEC-1 ABEC is the American ANSI standard. The corresponding German DIN standard and international ISO standard are as follows: