This deep groove ball bearing carries a spherical outer ring surface, allowing the bearing to accommodate shaft misalignment while the inner ring maintains a standard fit for mounting. The bore diameter is 17.0 mm, outside diameter 40.0 mm, width 12.0 mm, and net mass is 0.06 kg. Sealing is provided on both sides by R-type seals (NPP), designated as 203-XL-NPP-B. The spherical outer ring design compensates for angular deviation between shaft and housing, making the bearing suitable for applications where perfect alignment cannot be guaranteed during installation or where shaft deflection occurs during operation. The NPP sealing arrangement on both sides protects the bearing interior from contamination and retains lubricant, reducing the need for frequent relubrication. The inner ring is machined for a standard fit, simplifying shaft mounting without additional adapter components.