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Screw Jacks,Gearboxes,Actuators,Lifting Systems Manufacturers


2.5KN Aluminum Alloy Screw Jack

Screw jacks are made with two design concepts: travelling screw and travelling nut. Both are based around a worm gearbox with cast housings in ductile iron or aluminum alloy. The worm input shaft in case-hardened steel meshes with a bronze wheel. With travelling screw designs, the bronze wheel has a second thread cut into its bore. Into this is located an acme screw shaft. When the bronze wheel is turned the result is linear motion with the screw passing through the housing. In the case of travelling nut designs, the acme screw is fixed to the bore of the worm wheel and rotates with it. A bronze nut mounted on the screw moves along it as the screw rotates. Choice between travelling screw and travelling nut depends on the mounting requirements.

1. Maximum static load 2.5 kN, 250kg.
2. Compact cubic gearbox 60x50x50mm. Anodized aluminum housing.
3. Self locking acme screw Tr 14x4.
4. Gear ratios 5:1, 20:1.
5. Custom-made stroke 10-1500mm.
6. Screw end types: top plate, clevis end, threaded end, plain end, forked head and rod end.
7. Screw configuration: translating screw, anti-rotation keyed screw, rortating screw design.
8. Power source: hand wheel manual operation or electric motor driven.
9. Single unit or multiple units screw jack lifting system arrangements.

Technical Data

* Note: The dark gray figures in the tables indicates operational restrictions due to thermal limits. Static only (dynamic not permitted). Selection of screw jacks using these figures should only be carried out in consultation with our engineers. When your selection is made within the areas dark gray, you will need to reduce duty cycle or choose larger model screw jacks in order to allow effective heat dissipation.
* Conditions: Duty cycle 20%/h or 30%/10min, 20 °C ambient temperature. 
* Gear Ratios: H: high ratio, L: slow ratio.
* Nm: Input torque required, kW: Input power required.

Drawing Dimensions

About 2D Autocad dwg, dxf assembly drawings, and 3D stp, step, model, igs, prt or catpart assembly drawings, please contact Jacton Industry directly.