Jtc500 worm gear screw lifter,2 inches stroke machine screw jacks,50t jack screw arrangement,50 ton screw jack lift,500 kn gear lift, screw jack vertical arrangement,50 tonnes acme screw adjuster mechanism static load capacity 500 kn, high speed torque 442 n.m, low speed torque 148 n.m. lead screw (spindle) Tr120x14. high speed gear ratio 1/14, low speed gear ratio 1/56. upright or inverted translating screw, rotating screw and keyed screw configurations. precision positioning, self locking lead screw which support the loads and hold position without brake mechamism. single phase or three phases electric motor driven, gear motor driven or dc 24v gear reduction motor drives. thread end, clevis end, plain end, forked head and top plate (flange type) for lead screw (spindle) end types. customized various length stroke, under tension load, maximum 5500 mm stroke. single screw jack or multiple screw jacks system arrangements.