SJW classic screw jack

/SJW classic screw jack
SJW classic screw jack

Project Description

Worm Gear Screw Jack

The Worm Gear Machine Screw Jacks are very popular with competitive prices. Offer positive mechanical action, precise positioning, and uniform lifting speeds. High strength bronze worm gear is used, the payloads from 0.5T to 100T .  A total of 11 sizes are available, each in a traveling nut version and a basic version.

  • Load capacities from 0.5T to 100T.
  • Translating(traveling screw) and rotating (traveling nut) configurations
  • Electric Driven and Manual Operated both are available
  • Trapezoidal spindle (self-locking) and Ball Screw spindle (high efficiency) version
  • Design option: Standard, Anti-rotation, Anti-backlash or Safety nut
  • Standard and custom end fittings, mounting options, and drive shaft
  • Sijie can customize to your specifications

0.5T~15T Worm Gear Drive Screw Jack‎

Model SJW005 SJW010 SJW025 SJW050 SJW100 SJW150
Maximum Load (T) 0.5T 1T 2.5T 5T 10T 15T
Outer Diameter of screw (mm) 16 20 26 40 50 55
 Root Diameter of screw (mm) 10.8 14.8 19.7 30.5 38.4 43.4
Screw Pitch (mm) 4 4 5 8 10 10
Gear Ratio H 5 5 6 6 8 8
L 20 20 24 24 24 24
Efficiency % H 0.26 0.21 0.21 0.22 0.22 0.2
L 0.15 0.12 0.12 0.14 0.15 0.14
Permissible max. Power ( KW ) H 0.39 0.49 1 2 2.8 3.1
L 0.18 0.36 0.46 0.63 1.4 2.2
No-load Torque(N·m) 0.11 0.29 0.62 1.4 2 2.6
Permissible torque of input shaft (N·m)* 9.8 19.6 49 153.9 292 292
Required torque of input shaft at max. Load (N.m) H 2.5 6.2 16.1 48.7 90.7 149
L 1.1 2.9 7.4 20 45.3 72.3
Screw travel length (mm) per turn of worm shaft H 0.8 0.8 0.83 1.33 1.25 1.25
L 0.2 0.2 0.21 0.33 0.42 0.42
Permissible max. Input(rpm) when max. load H 1500 750 600 400 300 200
L 1500 1200 600 300 300 290
Screw torque when max. Load (N·m) 8.6 20.1 65.1 201.5 503.6 813.2

20T~100T Worm Gear Drive Screw Jack‎

Model SJW200 SJW300 SJW500 SJW750 SJW1000
Maximum Load (T) 20T 30T 50T 75T 100T
Outer Diameter of screw (mm) 65 85 120 130 150
 Root Diameter of screw (mm) 51.3 67 102 112 127
Screw Pitch (mm) 12 16 16 16 20
G         Gear Ratio H 8 10.6 10.6 10.6 12
L 24 32 32 32 36
Efficiency % H 0.2 0.19 0.15 0.13 0.13
L 0.13 0.11 0.1 0.8 0.8
Permissible max. Power ( KW ) H 5 8.4 13.4 14.4 21.4
L 3.2 4.6 5.7 7.2 9.4
No-load Torque(N·m) 3.9 9.8 19.6 29.4 39.2
Permissible torque of input shaft (N·m)* 292 735 1372 1764 2450
Required torque of input shaft at max. Load (N.m) H 238.1 400.1 856 1380.5 2040.9
L 124 244 453.3 761.3 1278.3
Screw travel length (mm) per turn of worm shaft H 1.5 1.5 1.5 1.5 1.67
L 0.5 0.5 0.5 0.5 0.56
Permissible max. Input(rpm) when max. load H 200 200 150 100 100
L 250 180 120 90 70
Screw torque when max. Load (N·m) 1287.7 2531.9 5551.3 8921.8 13878.3

SJW Series Worm Screw Jack Ordering Guide Information

SJW – 010  –  US   T  –    C –    1/6  –  300   –  Y
                        2        3        4         5          6          7

1: Jack Model

2: Screw Configuration & Mounting Orientation

US: Upright translating screw        UK: Upright keyed screw        UR: Upright rotating screw
IS: Inverted translating screw         IK: Inverted keyed screw         IR: Inverted rotating screw

Note:  US, IS (Screw rotation, do axial motion)  UK, IK (Screw anti-rotation, do axial motion)

UR,IR(Screw fixed rotation, traveling nut do axial motion)

SJW Screw Configuration & Mounting Orientation

3: Screw Top End

Screw jack Top End

4: Worm Shaft Input Types

A: left side worm shaft input.
B: right side worm shaft input.
C: double worm shaft input.
M1: left side motor flange direct input.
M2: right side motor flange direct input.
M3: left side motor flange direct input, right side worm shaft input.
M4: right side motor flange direct input, left side worm shaft input.

Worm Shaft Input Types

5: Gear Ratio

6: Travel Stroke

SJW machine screw jack travel stroke

 

7:  Accessories

N: Standard Jack, No additional accessories
P: Protective Tube
R: Dust Cover
Y: Hand Wheel
Other accessories,please check below picture

screw jack accessories onescrew jack accessories twoscrew jack accessories threescrew jack accessories four
screw jack common layout multiple screw jack configurations