SWL Series Hand Wheel Worm Gear Jack for Lifting Equipment

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SWL Series Double Input Shafts Worm Gear Jack for Construction Jump Form

A worm gear jack is a mechanical drive that uses a worm wheel to convert rotational motion into linear motion. It is commonly used in a variety of industrial applications, such as lifting heavy objects or adjusting the height of equipment. Worm gear jacks are known for their high efficiency, strength, and durability.

The basic design of a worm gear jack consists of the worm gear, worm shaft, and lifting screw. The worm gear is a cylindrical gear with spiral threads engaged with the worm shaft. The worm shaft is the threaded rod that turns the worm gear. A lifting screw is a threaded rod that moves in a straight line when it is rotated by a worm gear.

SWL series worm gear jack is the basic part of lifting. Jack through worm gear drive screw to achieve lifting, pushing, turning, and other functions. The jack has two modes of movement: screw movement and nut movement. The input form of the jack has single shaft input, dual shaft input, flange input, flange plus shaft input, etc. Screw moving type and biaxial input type are the basic types of screw elevator, widely used.

Worm Gear Jack Model Nomenclature:

e.g. SWL 2.5 M-1 A-Ⅱ-500 FZ
SWL 2.5 M 1 A 500 FZ
worm gear screw jack bearing capacity(25kN) ratio code structural form code structure assembly form screw stroke(mm) Protection from code

Worm Gear Jack Parameter:

Model SWL2.5 SWL5   SWL10/15  SWL20 SWL25 SWL35 SWL50 SWL100 SWL120
Max lifting load(Kn) 25 50 100/150 200 250 350 500 1000 1200
Screw diameter*
Tr30*6 Tr40*7 Tr58×12 Tr65*12  Tr90*16  Tr110*18 Tr120*20 Tr160*23 Tr180*25
Worm Ratio P 6:1 6:1 7:1 8:1 10:1 10:1 10:1 12:1 12:1
M 24:1 24:1 23:1 24:1 32:1 32:1 32:1 36:1 36:1
Stroke for one input turn
P 1.0 1.167 1.565 1.5 1.5 1.69 1.87 1.92 2.083
M 0.250 0.292 0.5 0.5 0.5 0.56 0.625 0.638 0.694
Max permissible power(kW) 1.45 2.59 3.47 4.02 5.38 13.06 13.9 28.5 62
Weight per 100mm
screw & protective tube(kg)
0.45 0.82 1.67 2.15 4.15 5.20 7.45 13.6 17.3

Hand Worm Gear Jack Features:

1. Suitable for heavy load, low speed, and low frequency;

2. Main components: precision trapezoidal screw pair and high precision worm gear pair;

3. With a self-locking function, it can bear the load without a braking device.

4 Top: roof end, inclined end, thread end, flat end

5. Widely used in machinery, metallurgy, construction, hydraulic equipment, and other industries.

6. With lifting, pushing, turning, and other functions.

7. It has the characteristics of a compact structure, small volume, light weight, wide driving source, low noise, high reliability, and long service life.

8. Easy installation and flexible use.

9. Accurately control the height of lifting and lowering.


We are one of the best worm gear jack suppliers. We can offer wide worm gear jack stock. We have exported our products to clients worldwide and earned a good reputation because of our superior product quality and after-sales service. We welcome customers at home and abroad to contact us to negotiate business, exchange information, and cooperate with us!



Advantages of Worm Gear Jacks:

Worm gear jacks have several advantages over other types of lifting devices. Some of the main advantages of worm gear jacks include:

High load capacity: Worm gear jacks are designed to support heavy loads from a few hundred pounds to several tons.

Precise lifting: Worm gear jacks provide precise lifting and lowering control, making them ideal for applications where accuracy is critical.

Stability: Worm gear jacks provide steady lifting force and are unlikely to shift or slip even under heavy objects.

Durability: Worm gear jacks are designed to withstand heavy use and provide long-lasting performance.

Versatility: Worm gear jacks are available in a variety of sizes and configurations for a wide range of applications.

    Worm Gear Jack Application: