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| Screw jack is one of the most used and cheap mechanism used for a wide variety of uses as lifting or moving any kind of load, even unbalanced ones. It can be used individually or in groups so to operate in perfect synchronisation. BP RIDUTTORI screw jacks are irreversible and don't need additional locking system. They are fully produced in our factory, and they guarantee high quality standard. The case is made of spheroidal cast iron or aluminium and the worm gears is made of special UNI 7816 18NCD5 iron, grounded on both the thread and shaft. It's possible to produce every NON STANDARD version to meet our customer request. |
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Our Screw Jacks with their wide torque range and our extensive experience assembling complete packages ensures we can help you solve your difficult linear motion design challenges with our screw jacks solutions.
Series BD | Screw jacks
Screw Jacks are the ideal product to push, pull, lift, lower and position loads of anything from a couple of kilograms to hundreds of tonnes. Many of our customers prefer our Series BD Screw Jack in preference to hydraulic or pneumatic jacks because of their greater precision and consistency. |
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Joyce/Dayton - Established 1873
Versatile Joyce Machine Screw Jacks lift and precisely position all kinds of loads from 250 lbs. to 250 tons. Upright or inverted, these precision jacks operate at full capacity whether the load is in tension or compression. WJ series single lead jacks are self locking under full lifting capacity, while DWJ double lead series jacks offer increased travel speed. Heat treated alloy steel worm shafts, aluminum/bronze worm gears and tapered roller or ball bearings provide rugged reliability.
Double extended worm shafts are standard. Joyce screw jacks come in translating screw, rotating screw (keyed for traveling nut) and keyed designs. All screw jack designs can be fitted with a protective boot. Jacks are available with one of four standard screw ends or special ends to meet your requirements.
An optional anti-backlash feature compensates for thread wear, assuring minimum play between lifting screw and worm gear for smooth, precise operation. Jacks equipped with the antibacklash feature are rated at full capacity under static conditions. For jack capacity under dynamic conditions please contact Joyce/Dayton.
Joyce/Dayton will custom design jacks to meet special requirements.
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| ZZ elevation screw gears are the ideal drive element for linear movements. With our comprehensive and functional range of accessories you can extend your plant into a complete system. In this we will individually advise and carry out the project design work on the lifting equipment exactly according to your requirements. Due to the fact that we manufacture the complete range of components ourselves we are still able to offer the well-known ZZ quality in this area also. |
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Screw jacks/Motor screw jacks for ball screws.
Exact ratio - 1/5.
Input torque from 22 Nm to 331 Nm.
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"LIMAline" from elero makes top technology invisible in the façade architecture: inconspicuously installed in the structural steelwork, the "LIMAline" system guarantees optimum movement possibilities for slats.
The facts:
- Moves façade slats of different materials, e.g. glass, aluminium, stainless steel or photovoltaic elements
- Shading, darkening, light deflection and sun position tracking are possible
- Virtually unlimited control of daylight is possible. Important, for example, for glare-free VDU workplaces and conference rooms
- Rotary movements of 360° produce many design possibilities for the façade. Example: slats with different front and rear sides
- Different positions, sizes and axial spacing of individual slats can be realized within a slat field |
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Stainless Steel Screw Jack.
Full Stainless Steel construction.
Capacities from 0.5 Ton to 150 Ton.
Stroke on request.
Body with Base or Pivoting feature.
Upright or Inverted Screw.
ranslating or Rotating Screw.
Motor applications. |
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| Stainless steel screw jacks (mechanical actuators) offer corrosion protection for linear motion applications in arduous environments. Designs are available with operating capacities from 10kN to 100kN and up to 300kN sustaining capacities. Either completely stainless steel units are available or hybrid units combining stainless steel and plated materials for a value engineered solution. All the design possibilities of the standard range are available including 2 gear ratios, anti-backlash, anti-rotation (keyed) and 6 mounting options. |
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Steel Screw Jack.
Capacities from 0.5 Ton to 150 Ton.
Stroke on request.
Body with Base or Pivoting feature.
Upright or Inverted Screw.
Translating or Rotating Screw.
Motor applications. |
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Worm Gear Screw Jacks are available from Power Jacks in both metric and Imperial (inch) designs in load ratings from 5 kN to 3500 kN with machine screw, ball screw or roller screw drives in Cubic, Single Face or Stainless Steel housings.
The screw jacks can have feature such as anti-backlash, anti-rotation, secondary guides, rotation monitors, wear indicators, safety nuts and more.
For full details visit Power Jacks website at www.powerjacks.com
The website contains free downloads of detailed catalogues, drawings and maintenance manuals.
The 3D CAD Product configurator allows a user to specify a screw jack in 3D on-line then download the model in 3D or 2D CAD formats (over 20 available). |
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Mechanical worm-gear screw jacks.
Capacities from 500 to 100.000 Kg.
Spindles over 6 meters long.
Screw jacks complete with motors.
Customized models available.
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Mechanical actuators
