... weight, small volume Good temperature change resistance Smooth operation with lower noise or vibration Easy mounting, free linking, high ... like conveyor belts,driven by motors or other engines,with requirements to slow the speedBasic informationModelRV025 030 040 ... for motor flanged coupling,NRV - with input shaft,NMRV-E motor flanged coupling with worm extension shaft,NRV-E with double extension worm ...