Products

SWL Worm Gear Screw Jack

Screw jacks offer self-locking safety, precise positioning, high load capacity, and mechanical efficiency. Durable, leak-free, and versatile, they enable synchronized operation and cost-effective lifting across industrial, automotive, construction, and precision applications.

Features

  • Safety & Stability: The inherent self-locking feature prevents back-driving, ensuring loads stay in place without external brakes.

  • Precision: Allows for fine, proportional control, making it ideal for tasks requiring exact positioning.

  • High Capacity: Compact design that can handle loads from a few kilograms to hundreds of tons.

  • Mechanical Advantage: Lifts heavy loads with minimal input force (torque).

  • Durability: Made of sturdy materials (e.g., high-quality steel) for reliable performance in harsh environments.

  • Versatility: Can be operated manually, electrically, or pneumatically; functions in various orientations (upright, inverted, horizontal).

  • Clean Operation: No hydraulic fluid, eliminating leak risks and making them suitable for sensitive environments (e.g., food, medical).

  • Synchronization: Multiple units can be easily linked for smooth, even lifting of large or uneven loads.

  • Cost-Effective: Lower initial purchase and long-term maintenance costs compared to hydraulic/pneumatic systems.

Screw Lift Applications by Industry

Industry Common Applications
Industrial & Manufacturing Machine tool adjustment (CNC, milling), assembly line positioning, conveyor systems, mechanical presses, welding positioners, and furnace door controls.
Automotive & Transportation Vehicle lifts for garages, railway car maintenance, aircraft assembly platforms, and adjustable loading ramps.
Construction & Civil Engineering Leveling scaffolding, supporting heavy structural members (beams, columns), house lifting for foundation repairs, and bridge maintenance.
Specialized High Precision Solar trackers, satellite antenna positioning, theater stage platforms, adjustable medical beds, and guardrail/bollard systems.

Specification Table – SWL Series Screw Jacks

Type SWL2.5 SWL5 SWL10 SWL15 SWL20 SWL25 SWL35 SWL50 SWL100 SWL120
Max hoisting force (kN) 25 50 100/150 200 250 350 500 1000 1200 1200
Max tensile force (kN) 25 50 99 166 250 350 500 1000 1200 1200
Worm gear ratio (P) 6:1 6:1 8:1 8:1 10:1 10:1 10:1 12.5:1 12.5:1 12:1
Travel per turn (P) mm 1.0 1.167 1.565 1.5 1.5 1.5 1.875 1.76 2.0
Worm gear ratio (M) 24:1 24:1 24:1 24:1 32:1 32:1 32:1 36:1 36:1
Travel per turn (M) mm 0.250 0.292 0.5 0.5 0.5 0.562 0.652 0.611 0.677
Worm screw torque (N·m) 18 44.2 10.8 182 314 398 848 1938 3315
Max allowable power (kW) 1.45 2.59 3.47 4.02 5.38 13.06 13.9 28.5 62
Total efficiency (P) % 223 21 23 21 19 18 15 13 12.00
Total efficiency (M) % 14 12 15 13 11 11 11 10 8
Lubricant quantity (L) 0.1 0.25 0.5 0.75 1.1 1.9 2.2 2.5 2.5
Weight w/o travel (kg) 7.3 16.2 25 36 70.5 87 420 1010 1350
Screw weight per 100mm (kg) 0.45 0.82 1.67 2.15 4.15 5.2 7.45 13.6 17.3

Notes:

  1. Max allowable power is rated at 20°C ambient temperature and 20%/h duty cycle.

  2. Total efficiency values are based on grease lubrication.

  3. Operating temperature range: –20°C to +80°C.

  4. Self-locking typically applies under static conditions.

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