Industrial Fcbb25 Bronze Spider Coupling Insert

The Boston Gear FCBB25/XFCBB25 Bronze Spider Coupling Insert is an oil-impregnated bronze spider insert designed for FC25 jaw couplings, providing a flexible, torque-capable connection between shafts while accommodating angular and parallel misalignment in mid-range power-transmission applications. It features a 2-1/2 inch outside diameter (FC25), a maximum operating speed of 870 RPM, and a maximum torque of 1,800 in-lb, with horsepower ratings of 2.9 hp at 100 RPM, 8.6 hp at 300 RPM, and 24.8 hp at 870 RPM, reflecting its performance across operating speeds. The insert uses Bost-Bronz as the spider material and is specified as fail-safe, with angular misalignment up to 0.5 degrees and parallel misalignment up to 0.001 inches, and a maximum operating temperature of 250°F. Designed for FC25 hubs in Boston Gear jaw couplings, this bronze spider insert delivers durable, maintenance-friendly torque transmission for compact drives where reliable coupling performance is essential.