SKF 5309A angular contact ball bearing is a double-row bearing with a bore of 45 mm, an outer diameter of 100 mm, and a width of 39.7 mm. As part of SKF's 5300-series, it is engineered to carry combined radial and axial loads in both directions within a compact footprint. This size class is commonly used for shaft support in gearboxes, machine tools, and other industrial equipment where rigidity and precise alignment are critical. The 5309A designation identifies this specific 45×100×39.7 mm configuration and it is widely available from SKF and authorized distributors.
