Boston Gear BF13-5 8-QC Three-Jaw Shaft Coupling

BF13-5/8-QC is a Boston Gear BF Series BOST-FLEX 3-Jaw shaft coupling, a powder-metal, urethane-insert spider-ring style device that connects shafts in compact drives without creating a rigid, single-piece connection; as part of the BF family, it offers a lightweight, economical solution for transmitting torque between shafts while tolerating minor misalignment. The BF Series is defined by its 3-Jaw spider-ring design and powder-metal construction, with urethane spider inserts providing flexibility, and bore sizes ranging from 3/8" to 1-1/4"; the BF13-5/8-QC specifies a 5/8" bore, aligning with the series' compact, versatile configuration. For precise mounting geometry, torque ratings, and speed recommendations by bore, refer to the official BF literature, as those figures vary with size and insert.