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6921RS1 Sealed ball Bearing 105x145x20mm Polaris Bearing Equal New Departure 993L056921RS1 Sealed Ball Bearing 105mm x 145mm x 20mm 6921RS1 sealed Ball Bearing, Each bearing has 2 Sealed to protect the bearing from dust or any possible contamination, plus its pre lubricated with grease so its ready to roll right away. 6921RS1 Ball Bearing Deep Groove Ball Bearing Dynamic load rating Cr: 32,800 N Static load rating Cor: 31,600 N Limiting Speed: Grease Lubrication: 5,000 RPM Dimensions: 105mm x 145mm x 20mm Bearing Inner Diameter: