... mounting, free linking, high efficiency Wide range of application to the work flow devices,like conveyor belts,driven by motors or ... extension worm shaft,Available combination NMRV+NMRV, NMRV+NRV, PC+NMRV,NMRV+UD(L) Single unit reduction ratio 1:5 ... sale service Free components or complete units will be supplied to replace the damaged ones of quality problems during guarantee period,free technical ...