1. Product Overview B75-55.N non-standard single-row open deep groove ball bearing, overall dimension 75mm inner bore × 110mm outer diameter × 18mm width, upgraded positioning version of base model B75-55. Outer ring machined with precision N circlip groove for axial fixing, open design without rubber seals, equipped with stamped low-carbon steel cage and standard C0 internal clearance. It bears radial load and slight bidirectional axial load, runs low-noise and stable under