This deep groove ball bearing carries a cylindrical outer ring and an inner ring machined for a fit, with a bore diameter of 40.0 mm, outside diameter of 80.0 mm, and width of 27.0 mm. Net mass is 0.45 kg. Sealing is provided on both sides by R seals (KRR execution), protecting the raceways and rolling elements from dust and moisture ingress while retaining grease within the bearing. The inner ring fit allows mounting onto a shaft with a corresponding fit rather than a plain bore, which simplifies axial location on the shaft. Sealing on both sides means the bearing is supplied pre-lubricated with grease and does not require an external sealing arrangement, making it suitable for applications where the shaft is subject to radial load and where protection against contamination is required without additional cover plates or labyrinth seals.