Boston Gear FC20-7 8 Industrial Precision Gear Reducer

The Boston Gear FC20-7/8 steel jaw coupling half (FC-Series) is a precision power-transmission component designed to pair with a matching FC20-7/8 half to form a compact, flexible shaft coupling for small- to mid-size drives. Manufactured from alloy steel for durability, this coupling half delivers reliable torque transfer while accommodating minor angular and parallel shaft misalignment and damping vibration between a motor or gear reducer and a driven shaft. It is widely used to connect motors, gear reducers, and drive components in equipment such as conveyors, pumps, fans, and machine tools, where a durable coupling that can absorb small misalignment is essential. In FC-Series couplings, the two halves are designed to fit together with a compatible bore and mounting arrangement to create a balanced, smooth-running connection. The FC20-7/8 size identifies the specific coupling family and bore compatibility, ensuring a proper match with the corresponding FC20-7/8 partner for reliable operation.