NMRV reducer is a new type of reducer, also called RV reducer. “NMRV” is a general term, which refers to aluminum housing reducer, and it is customary to call aluminum housing reducer as “NMRV reducer” in the world. The main components are oil seal, oil plug, worm gear box, ball bearing, output shaft, worm gear, worm, output shaft, motor connection plate (flange), output shaft cover, hexagon socket head screw, double key, gasket, etc.