The key technical parameters of the NMRV series worm gear reducers include center distance, housing size, transmission power, transmission ratio, input speed, efficiency, and mounting configuration. The available center distance specifications are 25, 30, 40, 50, 63, 75, 90, 110, and 130 mm, while the output bore/shaft diameter specifications include 11, 14, 18, 25, 28, 35, 42, and 45 mm. There are 10 distinct housing sizes, ranging from 025 to 150, and the transmission power range extends from 60 W to 15 kW.

The single-stage transmission ratios available are 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, and 100. The input speed of the worm shaft should not exceed 1500 r/min. The efficiency of the reducer is categorized into dynamic efficiency (ηd) and static efficiency (ηS), which determines the reversibility of the transmission. Specifically, if ηS < 0.5, the unit is statically irreversible (self-locking); if ηS falls between 0.5 and 0.55, it is considered low-static reversibility; and if ηS > 0.5, it is considered statically reversible [7]. NMRV reducers are designed to accommodate omnidirectional mounting; common mounting configurations include B3, B6, B7, B8, V5, V6, and others. Output options include hollow shaft mounting (with output flange), single-sided output shaft (AS), and double-sided output shaft (AB).