hand operated screw jack, screw hand locking jack, table hand jack screw

Hand operated screw jack, also called hand operated worm gear screw jack or hand operated bevel gear jack. Which is ideal solutions for applications where electricity or power generators is inconvenient or dangerous, light weight, low duty cycle, low target cost and short travel length.



Hand operated worm gear screw jack is composed of hand wheel or hand crank and a complete set worm gear screw jack with internal worm and worm gear sets, standard hand wheel or hand crank dimensions from 5" to 20" diameter, special hand wheel or hand crank dimensions required, please contact Jacton engineers. When hand operated worm gear acme screw jack, machine screw jack, which has intermittent precisely positioning and self-locking feature for no creeping down without brake mechanism or other locking systems. But hand operated worm gear ball screw jack, no self-locking feature, avoid ball screw back drive with attached load, which needs additional brake or locking mechanism to prevent it creep.



All hand operated worm gear screw jack has this disadvantage, slow travel speed, maximum 1.5mm travel length per full turn of hand wheel or hand crank. Hand operated bevel gear jack is ideal solution of slow travel speed with internal pairs spiral bevel gears, maximum up to 12mm travel length per full turn of hand wheel or hand crank.



For precise position display, a range of digital mechanical counters are available for matching with hand operated screw jacks. These digital mechanical counters measure the rotations of the input shaft and display corresponding position in a mecahncial counter window. The display value per input shaft revolution is variable and is achieved through a series of gear reductions configured to accommodate different worm gear screw jack ratios, screw pitch and travel lengths.

ideal solutions for applications where electricity or power generators is inconvenient or dangerous, light weight, low duty cycle, low target cost and short travel length.

JTW-2.5T TO JTW-120T

application in steel, pipe, tube, plate, roll forming roller adjustment, feeder straightener rolls adjustment, adjusting synchronous coil feed lines rolls, precision roller leveler, coil sheet slitter line, paint coating line, cut to length line, tension levelling line, continuous galvanizing line, beverage production line, foam concrete cutting machine, sanding machine, heavy vehicles mobile lifting platform, bottle monitoring system height adjustment, conveyor adjustment, plate saw angle adjustment, spray infeed conveyor lift system, theatre stage lifting platform, solar tracker, satellite dish antenna azimuth, raising sluice gate, screw scissor lift table, synchronized lifting system, food processing lifting system, extrusion machine, cnc steel leveling machine, blow molding machine, curing oven lifts, bolted tank, steel shuttering concrete beams adjustment, vintage industrial crank desk, solar panel tracking system, railway maintenance lifting jack, damper adjustment, continuous casting, cnc cut to length machine, robotics arm raising, palletizer, extrusion machine, motorized self-raising tower system, angle tilt adjustments with double clevis, aircraft docking system, open and close flood gates, metallurgy industry, mining industry, chemical industry, construction industry and irrigation industry.