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Screw Jacks,Gearboxes,Actuators,Lifting Systems Manufacturers


JTM Trapezoidal Screw Jacks

JTM Trapezoidal Screw Jacks is also named Worm Gear Trapezoidal Screw Jacks, Self-locking Trapezoidal Screw Jacks. The mechanical worm gear screw jack with trapezoidal lifting screw available with translating lifting screw or lifting nut. These mechanical screw jacks can be operated by manually or by electrical motor. More than one screw jacks can be connected together to move simultaneously.
How Trapezoidal Screw Jacks Work?
Main components of screw jacks are trapezoidal lifting screw, worm screw, worm gear and gear housing. Worm screw is rotated manually or by motor. Worm gear is rotated by worm screw. The lifting screw moves through the rotating worm gear. The linear motion speed of lifting screw depends on thread size and rotation ratio of worm gears. 

* Self locking trapezoidal screw, precise positioning, and uniform speed. 
* Available in 6 sizes from JTM10 to JTM200. 
* Static load capacity from 10 kN to 200 kN. Custom 300 kN, 500 kN, 750 kN and 1000 kN.
* Trapezoidal trapezoidal diameter from 20 mm to 65 mm. Custom larger diameter screw.
* Standard trapezoidal screw maximum length 6000 mm, custom longer stroke.
* Upright or Inverted mounting. Available in tension or compression loads.
* Translating, Keyed for non-rotating, and Rotating designs.
* Each Model has TWO gear ratios, they are High ratio and Slow ratio.
* Standard with 1-start trapezoidal screw, custom 2-starts trapezoidal screw which offers increased travel speed and require a brake or external locking device to hold position.
* Custom-made trapezoidal screw diameter and pitch, gear ratios, and worm shaft sizes.
* Trapezoidal Screw Ends: top plate, clevis end, plain end, threaded end, fork end, rod end.
* Can be operated by manually operated or by electrical motor driven.
* Single unit use, or complete jacking system including gear motors, bevel gearboxes, connecting shafts and couplings for dual or multiple jack arrangements.
* Custom-made double clevis screw jack, anti-backlash screw jack.
* Can be used as alternatives to hydraulic and pneumatic systems. 
* Trapezoidal Screw: Carbon steel #45. Custom stainless steel.
* Worm(Input Shaft): Hardened worm, carbon steel #45. Custom stainless steel.
* Worm Gear(Wheel): High strength bronze.
* Travelling Nut and Safety Nut: High strength bronze.
* Housing(Gearbox): Ductile Iron

Trapezoidal Screw Jacks Applications
* Paper, press, printing industry
* Gypsum factories
* Bridge jacks for road and bridge lifting
* Shipyards
* Opening and closing of penstocks
* Industrial process
* Roll form machinery
* Mining industry
* Sheet metal forming machinery
* Mechanical lifting applications
* Platform lifting applications
* Food processing machinery
* Construction sector
* Defense industry
* Lift tables
* Stage setup applications