Boston Gear FC20-1 Shaft Coupling

Boston Gear FC20-1 Shaft Coupling is a steel FC20-series jaw-type hub with a 1 in bore and a 2 in outside diameter, offering a compact 3-11/16 in overall length for space‑constrained power transmission. The bore carries a round profile with a 1/4 in wide by 1/8 in deep keyway and is secured to the shaft by a set‑screw locking arrangement using 3/8-16 screws. The FC20-1 features a hub diameter of 1-3/4 in, a hub length of 1-1/8 in, and a through-bore length of 1-1/4 in, delivering precise alignment within a robust 2 in OD package. Constructed from carbon steel, this FC20-1 hub maintains a straight jaw profile consistent with FC-series components and is designed for reliable torque transmission in industrial drives that require a keyed, clamped connection on a 1 in bore shaft.