The SKF 6009 is an open deep groove ball bearing (unsealed), featuring a 45mm inner diameter, 75mm outer diameter, and 16mm thickness. Made of high-carbon chromium steel (GCr15) with a pressed steel cage, it suits medium-speed, medium-load applications in clean environments (e.g., machine tool spindles, industrial drives). It handles radial and bidirectional axial loads and requires regular lubrication.