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The Jaw Coupling Insert Synthetic Rubber FC30 from Boston Gear is designed for high-performance power transmission applications. This 3-jaw insert features a complete assembly that requires two hubs and one jaw-coupling spider (all sold separately). It offers low noise levels, making it ideal for motor speeds and offering minimal disturbances. With its synthetic rubber spiders, this product is resistant to oil, providing reliable performance in challenging environments. The FC30 size has a maximum rated torque of 800 inches-pound, and can operate at temperatures ranging from -32 to 200F. The jaw coupling insert is suitable for various applications including industrial machinery, conveyors, mixers, and agitators, providing optimal power transmission efficiency and durability.