deep groove ball bearings6048 Inner Diameter 240mm Outer Diameter 360mm Thickness 56mm Number of Sphere - Bearing Type 6048 Deep Groove Ball Bearing Type of Cage Crown Sleeve Chuck Material Chrome Steel Gcr15 Shield 6048 ZZ shield 6048 2RS seal 6048 ZRS shield and seal 6048 NRS 6048 ZNR Tolerance 0-38micronmeter Radial Internal Clearance 30-95micrometer