speed reducer NMRV series worm-gear speed reducer is a ner-generation of products developed by our company on the basis of perfecting WJ series products with a compromise of advanced technology both at home and abroad, its main features are as follows: 1.Made of high-quality aluminium alloy, light in weight and non-rusting. 2. Large in output torque. 3.Smooth in running and low in noise. 4.High in radiating efficiency. 5.Good-looking in appearance, durable in service life and small in volume. 6.Suitable for omnibearing installation.