... backlash nut device. NOSEN R&D,production & sales a new Europe-type RNF-Series Cubic Gearboxes Self lock jacks, ... driven by electric or manually, fully synchronization.Speed of Travel* Fast Speed N1 turn 1 mm travel1500 mm/min ... * Low Speed L1 turn 0.25 mm travel375 mm/ ... &worm gear play, high speed(N),worm shaft backlash ±3 degrees, Low speed(L),±5 degrees.Lateral ForceUsually ...