... : * Max load 50 tons * Self-locking trapezoidal screw * Anti-backlash nut device. NOSEN R&D,production & sales a new Europe ... -type RNF-Series Cubic Gearboxes Anti-backlash Jacks, small&compact appearance, installation sizes is the same as ... mm travel375 mm/minTolerance & BacklashTrapezoidal-type screw axial backlash 0.15 mm, radial backlash 0.2 mm,lifting screw outer diameter and ...