SWL Worm Gear Screw Jacks are linear motion actuators that combine a worm-gear mechanism with a trapezoidal screw or a ball screw to perform lifting, lowering, pushing, pulling, and precise position adjustment. The worm-gear transmission converts motor rotation into linear screw motion, enabling controlled movement with high load capacity and excellent positioning stability. The SWL series covers static load capacities from 1 kN to 1200 kN and can operate as a single unit or in mechanically or electrically synchronized multi-jack systems.

Two structural configurations are available. Type 1 uses a translating screw with a rotating nut, ideal for vertical lifting and precise positioning. Type 2 uses a rotating screw with a translating nut, suitable for compact installations or high-speed operations. Multiple screw-end options are offered, including cylindrical ends, flange ends, threaded ends, and flat ends for easy integration with machine structures. Trapezoidal spindles provide self-locking capability for load-holding applications, while ball-screw versions deliver higher efficiency and faster operating speeds for dynamic cycles.

SWL screw jacks may be equipped with anti-rotation devices, protective covers, telescopic tubes, and various mounting configurations to suit harsh environments such as dust, outdoor exposure, heavy vibration, or high-duty cycles. The jacks can be driven by a handwheel, electric motor, gear reducer, or coupling system. Their robust design, strong load-carrying capability, and long-term durability make them suitable for industrial machinery, automation equipment, lifting platforms, stage systems, and precision alignment applications.

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Features

Wide Load Capacity
From 1 kN to 1200 kN, suitable for light-duty to heavy industrial lifting.

High Reliability & Safety
Trapezoidal screw versions provide inherent self-locking; ball screw versions support high-speed, high-efficiency lifting.

Multiple Structural Options
Type 1 (translating screw) and Type 2 (rotating screw) for different system designs.

Flexible Screw Head Styles
Cylindrical, flange, threaded, and flat-end options for compatibility with different mechanical interfaces.

Anti-Rotation Design
F-key anti-rotation, Z steel pipe protection, or X telescopic tube protection depending on application.

High Efficiency & Long Service Life
Optimized worm-gear pair with optional ball screw spindle for faster duty cycles.

Multi-Point Synchronization
Can be driven by motors, bevel gearboxes, or cardan shafts for synchronized lifting.

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Technical Parameters

SWL Worm Gear Screw Jacks

Model	Rated Load (kN)	Max Tensile Load (kN)	Screw Type	Lead (mm/turn)	Speed Ratio (N / L)	Max Input Speed (rpm)	Efficiency (%)	Self-locking	Max Spindle Compression Load	Housing
SWL 1	10	10	Tr24×4	4	5 / 20	1800	29	Yes	Refer to buckling charts	Cast iron
SWL 2.5	25	25	Tr30×6	6	6 / 24	1500	27	Yes	Refer to buckling charts	Cast iron
SWL 5	50	50	Tr40×7	7	8 / 32	1000	24	Yes	Refer to buckling charts	Cast iron
SWL 10	100	100	Tr58×12	12	10 / 40	1000	22	Yes	Refer to buckling charts	Cast iron
SWL 20	200	200	Tr65×12	12	12 / 48	900	20	Yes	Refer to buckling charts	Cast iron
SWL 25	250	250	Tr90×16	16	12 / 48	750	18	Yes	Refer to buckling charts	Cast iron
SWL 35	350	350	Tr100×20	20	15 / 60	750	17	Yes	Refer to buckling charts	Cast iron
SWL 50	500	500	Tr120×20	20	15 / 60	600	16	Yes	Refer to buckling charts	Cast iron
SWL 100	1000	1000	Tr160×23	23	20 / 80	600	14	Yes	Refer to buckling charts	Cast iron
SWL 120	1200	1200	Tr180×25	25	20 / 80	500	13	Yes	Refer to buckling charts	Cast iron

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Application

Industrial Lifting & Positioning
Assembly lines, height adjustment systems, production machinery lifting modules.

Automated Production Equipment
Robotic platforms, synchronized lifting tables, actuation in automated mechanical systems.

Metallurgy & Heavy Industry
Furnace doors, rolling mill adjustments, heavy-duty actuators.

Solar Tracking Systems
Elevation adjustment for solar heliostats & CSP mirrors.

Transportation Equipment
Bridge deck lifting, cargo handling systems, vehicle testing machinery.

Stage & Entertainment Engineering
Stable lifting of platforms, lighting systems, and stage elements.

Construction & Civil Engineering
Formwork lifting, adjustable supports, architectural motion systems.