SWL series is one common series of worm screw jack, is widely used in machinery, metallurgy, construction, water conservancy equipment and other industries. SWL worm gear screw jack is a basic lifting component, having the features of compact structure, small size, light weight, wide power source, low noise, convenient installation, flexible use, multiple functions, multiple matching forms, high reliability and long service life. SWL screw jack has manual and electric drive modes. The manual mode is mainly to install the hand crank(hand wheel) , and the electric mode is mainly to connect the motor with flange. If by manual use, the speed ratio generally adopts the smallest one such as 6:1.
There are two structural types of screw jack, type 1 is screw movement, the worm gear and the screw are connected by thread, and the screw does axial movement, type 2 is nut movement, the worm gear and the screw rod are connected by a key, the screw rod is equipped with a nut, and the nut on the screw rod moves axially.
The two structural types of the screw jack are divided into two assembly types.
Type 1 screw movement is further divided into 1A screw working end on the top, 1B screw working end on the bottom.
Type 2 nut movement is further divided into 2A screw working end on top, nut top or pull down, 2B screw working end on bottom, nut pressing down or pulling up.
There are 4 common types of screw head: I type (cylindrical type), II type (flange type), III type (threaded type) and IV (flat head type):
Gear Ratios: normal speed (P) like 6:1, 8:1, 12:1, and slow (M) speed like 24:1.
Screw protection:
type 1 screw movement screw: basic type, anti-rotation type (F) and type with protective tube (Z)
type 2 nut movement screw: basic type and type with protective cover (Z)
Model nomenclature:
| e.g. SWL 2.5 M-1 A-Ⅱ-500 FZ | |||||||
| SWL | 2.5 | M | 1 | A | Ⅱ | 500 | FZ |
| worm gear screw jack | bearing capacity(25kN) | ratio code | structural form code | structure | assembly form | screw stroke(mm) | Protection form code |
Parameters:
| Model | SWLD2.5 | SWLD5 | SWLD10/15 | SWLD20 | SWLD25 | SWLD35 | SWLD50 | SWLD100 | SWLD120 | |
| Max lifting load(Kn) | 25 | 50 | 100/150 | 200 | 250 | 350 | 500 | 1000 | 1200 | |
| Screw diameter* thread dimension(mm) |
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 (mm) |
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 | |
Finished screw jacks:
Packaging:
View Dimensions of SWL screw jack, making sure the model is suitable for your installation space.
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