Features:of NRV series worm-gear speed reducer 1.model number:NRV030-NRV130 2.self ... 4.good cooling ef NRV series worm-gear speed reducer,such NRV025, NRV030 gear reducer, gear speed reducer Features: 1) High quality ... ) High accuracy worm gear and worm shaft 3) Less noise and lower temperature increase 4) Easy mounting and linking, high ... ,NRV063,NRV075,NRV090,NRV110,NRV130 NRV SERIES WORM GEAR REDUCER