Heavy-duty Low-speed Screw Jack

This heavy-duty low-speed screw jack is a professional industrial linear actuator specially developed for high-load, low-motion-speed, high-stability working conditions. It adopts a reinforced worm gear transmission structure and high-strength screw assembly, converting rotary input power into stable, controllable linear lifting, pushing and pulling movement. Compared with standard speed models, it is designed with ultra-stable transmission ratio, lower running speed, higher load bearing capacity and stronger static holding performance, which can maintain stable output and zero drift under long-term full-load operation, making it an ideal replacement for unstable hydraulic and pneumatic systems in heavy industrial scenarios.

 

Heavy-duty low-speed screw jack

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precision parts processing

precision parts processing

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precision parts processing

This heavy-duty low-speed screw jack is specially designed for working conditions requiring ultra-stable linear movement, high static load capacity and low running speed, and is widely used in heavy industry, infrastructure, precision equipment and special engineering fields. Core application scenarios include:

Metallurgical and heavy industrial equipment: Applied to rolling mill roll gap fine adjustment, large furnace door lifting, high-temperature production line pressing mechanism, heavy die-casting mold positioning and other high-load, low-speed adjustment scenarios, stable operation under continuous heavy load without heat accumulation.

Bridge and construction engineering: Used for bridge prefabricated component support, large formwork height locking, building foundation jacking and structural calibration, with ultra-low speed to achieve millimeter-level fine adjustment, and reliable self-locking to ensure long-term load safety.

Heavy machinery assembly and maintenance: Suitable for large mechanical equipment assembly positioning, heavy workpiece lifting support, press machine auxiliary pressing system, with strong impact resistance and stable load holding capacity.

Precision testing and pressure equipment: Applied to large-scale material testing machines, static pressure testing equipment, constant pressure loading system, low-speed stable movement can avoid impact force, ensure uniform and stable pressure output.

Port and logistics heavy handling: Used for heavy container fixed support, large lifting platform auxiliary locking, heavy conveyor height adjustment, adapt to harsh outdoor environment, maintain stable performance under dust and vibration conditions.

Wind power and new energy equipment: Applied to wind turbine nacelle angle fine adjustment, solar bracket heavy load support, power station large equipment maintenance lifting, with long service life and maintenance-free performance.

The heavy-duty low-speed screw jack adopts an integrated reinforced structure, all core components are optimized for low-speed heavy-load operation, with high structural strength, small wear and stable transmission, and the complete structure consists of 6 core modules:

Reinforced worm gear transmission pair: The core transmission component adopts high-hardness alloy steel worm shaft after overall quenching and tempering and high-frequency surface hardening treatment, matched with high-density wear-resistant bronze worm gear, large tooth surface contact area, stronger torque bearing capacity, specially matched low-speed transmission ratio, lower running noise, smaller friction loss, more suitable for long-term full-load continuous operation.

High-strength heavy-duty screw assembly: Adopts thickened diameter high-strength carbon alloy steel screw, processed with trapezoidal or Acme precision thread, large thread bearing area, strong compression and bending resistance, not easy to deform under long stroke and heavy load, matched with high-precision screw nut, uniform force distribution, suitable for low-speed reciprocating movement, with excellent wear resistance.

Integral cast heavy-duty housing: Adopts thickened high-strength ductile cast iron integrated casting structure, high rigidity, no deformation under heavy load, good shock absorption performance, fully enclosed structure design, can effectively isolate dust, moisture and mechanical impurities, protect internal transmission components, and adapt to harsh industrial environment.

Heavy-duty bearing support system: Equipped with large-size tapered roller bearings and thrust bearings, can bear large axial load, radial load and composite overturning force at the same time, reduce rotational friction, ensure that the screw and worm shaft run smoothly at low speed, no jamming, no abnormal noise, and greatly extend the service life.

Built-in reliable self-locking structure: Relying on the worm gear pair and screw thread friction angle design, with inherent stable self-locking performance, can achieve reliable load holding at any stroke position when the drive stops, no sliding, no sinking, no need for additional brake device, greatly improve the safety of heavy-load vertical lifting.

Standardized sealing and lubrication system: Adopts multi-stage labyrinth sealing structure and high wear-resistant oil seal, effectively prevents lubricating oil leakage and external impurities from entering, built-in special long-acting lubricating grease, suitable for low-speed operation, good adhesion, not easy to lose, reduce daily maintenance frequency.

This heavy-duty low-speed screw jack has obvious technical and performance advantages compared with standard screw jacks, hydraulic cylinders and pneumatic actuators, especially suitable for high-standard heavy-duty low-speed working conditions:

Ultra-stable low-speed motion performance: Specially optimized transmission structure and ratio design, achieve stable and uniform low-speed linear movement, no crawling, no impact, no jitter, can achieve micron-level fine adjustment, perfectly solve the problem of unstable movement of ordinary actuators at low speed.

Extra-heavy load bearing capacity: All components are reinforced and upgraded, with larger load margin, can maintain stable output under long-term full-load operation, not easy to fatigue and deform, with excellent static load and dynamic load performance, far exceeding standard speed models of the same volume.

Excellent safety and self-locking performance: Inherent double self-locking design of worm gear and screw, reliable load holding at any position, will not slide or sink due to load gravity, no need for additional braking devices, completely avoid the risk of oil leakage and load drop of hydraulic system.

Low heat generation, low wear and long service life: Low-speed operation reduces friction heat generation and component wear, no high-temperature failure caused by continuous operation, stable performance attenuation is slow, normal service life is more than 3 times that of ordinary hydraulic actuators, greatly reduce equipment replacement and maintenance costs.

Strong environmental adaptability: Fully enclosed reinforced structure, good dustproof, waterproof, anti-vibration and anti-corrosion performance, can work stably in high dust, high humidity, large temperature difference and harsh industrial environment, no frequent maintenance required.

Flexible configuration and strong compatibility: Support manual handwheel drive, ordinary motor drive and servo motor precise drive, can be used alone or multiple synchronous linkage, flexible installation orientation, no need for complex hydraulic station and air compressor system, simple installation and debugging.

Clean and energy-saving, low operation cost: Compared with hydraulic and pneumatic systems, no oil leakage, no air leakage, no pollution, low energy consumption, no need for regular replacement of hydraulic oil and maintenance of pipeline system, greatly reduce later operation and maintenance costs.