Industrial NB40A-40A15 Power Transmission Assembly

The Industrial NB40A-40A15 Power Transmission Assembly is a steel spur gear and ANSI #40 roller chain sprocket pair designed to transfer rotational motion between parallel shafts in conveyors, packaging equipment, and material-handling systems. It combines a Boston Gear NB40A spur gear with a Martin Sprocket & Gear 40A15 sprocket for reliable torque transfer and synchronized motion in mechanical power transmission and motion-control applications used in conveyors, packaging machinery, automated production lines, and material-handling setups. Key specifications include gear with 40 teeth and sprocket with 15 teeth, gear diametral pitch of 16 DP, gear pressure angle 14.5°, gear bore diameter 1/2 in, gear outside diameter 2.625 in, gear pitch diameter 2.500 in, and gear face width 1/2 in, with an ANSI #40 roller chain compatibility at 1/2 in pitch; sprocket type is Type A plain bore. The sprocket features an outside diameter of 2.652 in and a typical 1/2 in bore, with a plain bore hub (no keyway or setscrew). The assembly weighs approximately 0.94 lb and originates from the United States; maintenance teams or system integrators typically use it for equipment repairs, drive-system modifications, and replacement of worn gears and sprockets in industrial drives.