6006NR Nachi Bearing Open C3 Snap Ring Japan 30x55x13 Ball Bearings Single-row deep groove geometry for high speeds and supporting radial loads High-carbon chrome steel parts for increased wear and fatigue resistance C3 radial internal clearance for radial slack between the inner and outer rings is greater than CN (normal) to compensate for thermal expansion Pressed steel cage evenly spaces rollers for reduced friction, vibration, and noise Snap ring for holding the bearing in place