1. Product Overview 7305BDB is factory pre-matched duplex back-to-back (DB) paired single row angular contact ball bearing set, standard ISO dimension 25mm inner bore × 62mm outer diameter × 34mm total paired width, each single unit width 17mm. Model code full explanation: 7305: Medium heavy series single row angular contact ball bearing base model B: 40° large contact angle design, superior bidirectional axial load capacity DB: Back-to-back duplex matched arrangement, two