The gearbox with a textured surface is made of high-quality rigid cast iron, precisely bored by a machining center. The hardened gear surfaces are manufactured from high-quality low-carbon alloy steel, treated with carburizing and quenching, and finely processed using precision techniques such as gear grinding. The reducer integrates a two-stage helical gear drive with a single-stage spiral bevel gear drive, achieving right-angle output through the spiral bevel gear stage. All transmission components are lubricated via oil splash lubrication from an oil sump. The unit features a compact structure, smooth transmission, low noise, high load capacity, high transmission efficiency, long service life, and finely graded transmission ratios, making it suitable for speed adjustment and torque multiplication.