1. Good quality, low noise 2. Long life, compact structure 3. Competitive price 4. High strength, compact Helical-Worm Gear Box For SR gear box, the boxes are cast precisely by high steel material and processed at pricessing center;the gears are made of high-quality alloy steel, are treated with surface hardening andgear ground; and the key parts are imported. The whole geared motors are small in ...