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Jtc50 worm gear screw lifter,5t screw actuator worm gear, 5 t linear worm drive jack,50 kn fabricated worm screw jack,5 ton screw worm gearbox,5 tonnes worm wheel screw drive lift,5000kg worm screw lift static load capacity 50 kn, high speed torque 31 n.m, low speed torque 9.7 n.m. lead screw (spindle) Tr40x7. high speed gear ratio 1/7, low speed gear ratio 1/28. 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. hand wheel or hand crank manual operation, or 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 2000 mm stroke. single screw jack or multiple screw jacks system arrangements.