The SKF 6303 is an open deep groove ball bearing (unsealed), featuring a 17mm inner diameter, 47mm outer diameter, and 14mm thickness. Made of high-carbon chromium steel (GCr15) with a pressed steel cage, it suits medium-speed, light-load applications (e.g., electric motors, agricultural machinery, motorcycles). It handles radial and bidirectional axial loads, offering low friction, high rigidity, and easy maintenance.