Boston Gear NL12B Industrial Grade Steel Spur Gear

Boston Gear NL12B is an industrial-grade steel spur gear designed to transmit power between parallel shafts. This NL-series gear has 12 teeth and uses a 4 diametral pitch (4 DP) with a 14-1/2° pressure angle (14-1/2 PA), giving a pitch diameter of 3.0 inches. The NL12B variant is specified without a keyway or setscrews, meaning it is delivered without a built-in keyway and mounting screws and is intended to be paired with a compatible shaft or bore solution as required. Manufactured from steel for durability, this gear is suited for standard power transmission tasks in industrial machinery, gearboxes, conveyors, and automation equipment where a compact 3-inch-diameter gear is appropriate. It is part of Boston Gear’s catalog of standard spur gears offered for parallel shaft operation, with multiple NL-series sizes available to fit similar gear trains.