The Boston Gear BKF842B-18K-B5-S-M4 In-line Helical Speed Reducer is a high-quality industrial automation component designed to reduce the speed of electric motors. With a maximum speed of 1750 RPM and a torque capacity of 35 lbs, this unit is suitable for a range of industrial applications. Manufactured by Boston Gear, a trusted brand in the industry, this speed reducer is reliable and durable, ensuring smooth and precise motion control for your machinery or equipment.