The H&B series heavy-duty industrial gearboxes are a new type of hard tooth surface reducer, featuring a wide torque range. They are designed with a modular unit structure, allowing for both horizontal and vertical installation. They offer solid shaft, hollow shaft, and conical hub hollow shaft outputs, with a broad application range. The gears are made of high-strength alloy steel carburized and quenched, providing high efficiency, long service life, low operating noise, and high reliability.