Industrial NB40A-40A15 Power Transmission Assembly

Description:

The Boston Gear NB40A with Martin 40A15 Sprocket is a power transmission assembly used to transfer rotational motion between shafts and roller chain driven equipment in industrial machinery. Commonly installed in conveyors, packaging equipment, material handling systems, and manufacturing machinery requiring synchronized motion and torque transfer. Maintenance teams and system integrators use this assembly for equipment repairs, drive system modifications, and replacement of worn gears and sprockets in industrial applications. The assembly combines a Boston Gear steel spur gear with a Martin #40 chain sprocket for versatile mechanical power transmission applications.

Applications:

The Boston Gear NB40A assembly is commonly used in conveyor systems, packaging machinery, automated production equipment, and material handling systems where both geared and chain-driven motion transfer are required. The Martin sprocket allows compatibility with ANSI #40 roller chain while the Boston Gear component provides smooth and reliable power transmission between parallel shafts.

Technical Specifications:

• Boston Gear MPN: NB40A
• Martin Sprocket MPN: 40A15
• Product type: Spur gear and roller chain sprocket assembly
• Gear manufacturer: Boston Gear
• Sprocket manufacturer: Martin Sprocket & Gear
• Gear material: Steel
• Sprocket material: Steel
• Gear type: Spur gear
• Sprocket type: Type A plain bore sprocket
• Gear teeth: 40 teeth
• Sprocket teeth: 15 teeth
• Gear diametral pitch: 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
• Gear face width: 1/2 in
• Sprocket chain size: ANSI #40 roller chain
• Sprocket chain pitch: 1/2 in
• Sprocket outside diameter: 2.652 in
• Sprocket bore size: 1/2 in typical
• Hub style: Plain bore without keyway or setscrew
• Assembly application: Mechanical power transmission and motion control
• Approximate gear weight: 0.94 lb
• Country of origin: United States typical for original production units.

Common Replacements:

• Boston Gear NB40B Spur Gear with #40 Sprocket
• Martin 40A15 Sprocket Assembly
• Browning Steel Spur Gear and Sprocket Assembly