SJB ball screw jack

/SJB ball screw jack
SJB ball screw jack

Project Description

Worm Gear Ball Screw Jacks

Most screw jacks use trapezoidal screws Tr, because they are simple, robust and inexpensive. The proportion of screw jacks that use ball screws is however constantly increasing. The reasons for this are primarily their pitch accuracy, their high efficiency (less power consumption and less heat generation) and the higher pitches available, which permit higher stroke speeds.

  • No self-locking! Because of the lack of friction, a holding brake is necessary: a motor brake or a spring pressure brake is required.
  • Translating(traveling screw) and rotating (traveling nut) configurations
  • Design option: Standard, Anti-rotation, Anti-backlash or Safety nut
  • Standard and custom end fittings, mounting options, and drive shaft
  • Sijie can customize ball screw lift to your specifications
Model SJB010 SJB025 SJB050 SJB100 SJB150
Maximum Load (KN) 9.8 24.5 49 98 147
Outer Diameter of screw (mm) 20 25 40 50 50
 Root Diameter of screw (mm) 17.5 21.133 34.91 44.91 44.91
Screw Pitch (mm) 5 10 10 10 20
    Gear Ratio H 5 6 6 8 8
L 20 24 24 24 24
Efficiency % H 0.61 0.62 0.64 0.63 0.63
L 0.34 0.35 0.39 0.43 0.43
Permissible max. Power ( KW ) H 0.54 1.3 2.2 3.6 4
L 0.27 0.63 1 1.9 2.1
No-load Torque(N·m) 0.29 0.62 1.37 1.96 2.65
Keeping Torque(N·m) H 1.27 4.31 10.78 19.6 39.2
L 0.26 0.91 2.4 5.8 11.8
Permissible torque of input shaft (N·m)* 19.6 49 153.9 292 292
Required torque of input shaft at max. Load (N.m) H 2.8 9 21.5 39.1 77
L 1.4 4.3 9.6 20.4 39.6
Screw travel length (mm) per turn of worm shaft H 1 1.66 1.67 1.25 2.5
L 0.25 0.42 0.42 0.42 0.83
Permissible max. Input(rpm) when max. load H 1500 1400 1000 890 500
L 1500 1400 1000 890 500
Screw torque when max. Load (N·m) 8.7 34.7 86.7 208.2 416.3
Model SJB200 SJB300 SJB500 SJB750 SJB1000
Maximum Load (KN) 196 294 490 600 810
Outer Diameter of screw (mm) 63 80 100 125 160
 Root Diameter of screw (mm) 57.91 72.466 87 110 142
Screw Pitch (mm) 10 20 25 25 32
Gear Ratio H 8 10.67 10.67 10.67 12
L 24 32 32 32 36
Efficiency % H 0.62 0.56 0.6 55 55
L 0.42 0.34 0.38 35 35
Permissible max. Power ( KW ) H 5.5 8.9 13.3 14.5 21.5
L 2.8 4.1 6.5 7.5 9.5
No-load Torque(N·m) 3.92 9.81 19.6 27 38
Keeping Torque(N·m) H 51 68.6 140.1 175 260
L 15 19.5 41.2 52 70
Permissible torque of input shaft (N·m)* 292 735 1372 1764 2450
Required torque of input shaft at max. Load (N.m) H 104.5 169.6 317.5 435 663
L 54.2 98.5 177.9 242 365
Screw travel length (mm) per turn of worm shaft H 1.25 1.88 2.25 2.34 2.67
L 0.42 0.63 0.75 0.78 0.89
Permissible max. Input(rpm) when max. load H 500 500 400 310 300
L 500 400 350 295 240
Screw torque when max. Load (N·m) 555.1 1040.9 2081.7 2514 4586

SJB Series Ball Screw Jack Ordering Guide Information

SJB – 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