This is a single row deep groove ball bearing with a bore diameter of 40.0 mm, outside diameter of 52.0 mm, and width of 7.0 mm, giving it a thin-section, low-profile design. Net mass is 35.0 g. The bearing uses a steel sheet metal cage (JN) and features radial internal clearance in the CN (Group N) range. Limiting speed is rated at 19300 1/min, with a reference speed of 8600 1/min. The narrow cross-section suits applications where axial space is restricted while radial load capacity from a deep groove design is still required. The CN clearance allows normal running conditions without excessive preload, supporting stable operation across the stated speed range. The steel sheet metal cage keeps rolling element spacing consistent at higher speeds while contributing to the low net mass. Being an open bearing (bore type Z designation relates to the raceway groove, not sealing), lubrication and contamination protection must be provided externally, so grease or oil supply and sealing arrangement should be selected according to the operating environment.