The 45 mm steel shaft sleeve bearing is designed for use with bearing numbers 6009, 6209, and 6309, featuring a sleeve length of 50 mm and available in undersizes of 2 mm (43 mm bore) and 3 mm (42 mm bore). These bearings typically have an inner diameter of 45 mm, outer diameters ranging from 75 mm to 100 mm, and widths between 16 mm and 25 mm depending on the specific model. The 6309 bearing, for example, supports a dynamic load capacity of approximately 5385.6 kg and offers extended lifespan and durability. These steel shaft sleeves provide wear resistance and precise fit for reliable shaft support in various mechanical applications.