Ball Screw Jacks, Machine Screw Jacks, Bevel Gear Jacks
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    Machine Screw Jacks

    The machine screw jack is a basic lifting component with the advantages of compact structure, small volume, easy installation, high reliability, and long service life. Single jack or multiple jacks system arrangements are available. Available in ten sizes, these machine screw jacks' load capacity is from 1 ton to 100 ton as standard, customized 150 tons,200 tons,250 tons.

    Alloy steel input shafts
    ZQAl9-4 tin bronze worm gears
    Tapered roller bearing or ball thrust bearings offer rugged reliability
    Double input shafts standard
    Translating screw, rotating screw, keyed screw configurations in upright or inverted mounting orientation
    Electric driven and manual operated both are available
    Protective tube and bellows are available
    Anti-backlash devices, safety nut, and Anti-rotation are available
    Customized machine screw jacks can be made to your specifications

     Get A Quote  Download Drawings

    Machine Screw Jacks Specifications

     
     
    Specifications
    Model SJW-010 SJW-025 SJW-050 SJW-100 SJW-150 SJW-200 SJW-300 SJW-500 SJW-750 SJW-1000
    Max. Lifting Load ( KN ) 9.8 24.5 49.0 98.0 147 196 294 490 735 980
    Outer Diameter Of Screw ( mm ) 20 26 40 50 55 65 85 120 130 150
    Root Diameter Of Screw ( mm ) 14.8 19.7 30.5 38.4 43.4 51.3 67 102 112 127
    Thread Pitch ( mm ) 4 5 8 10 10 12 16 16 16 20
    Gear Ratio ( H ) 1/5 1/6 1/6 1/8 1/8 1/8 3/32 3/32 3/32 1/12
    Efficiency % ( H ) 21 21 22 22 20 20 19 15 13 13
    Screw Travel(mm) Per Turn Of Worm Shaft( H ) 0.80 0.83 1.33 1.25 1.25 1.50 1.50 1.50 1.50 1.67
    Gear Ratio ( L ) 1/20 1/24 1/24 1/24 1/24 1/24 1/32 1/32 1/32 1/36
    Screw Travel(mm) Per Turn Of Worm Shaft( L ) 0.20 0.21 0.33 0.42 0.42 0.50 0.50 0.50 0.5 0.56
    Efficiency % ( L ) 12 12 14 15 14 13 11 10 9 8
    No-Load Torque ( N.m ) 0.29 0.62 1.4 2.0 2.6 3.9 9.8 19.6 29.4 39.2
    Max. Permissible Input Power ( KW ) ( H ) 0.49 1.0 2.0 2.8 3.1 5.0 8.4 13.4 14.4 21.4
    Max. Permissible Input Power ( KW ) ( L ) 0.36 0.46 0.63 1.4 2.2 3.2 4.6 5.7 7.2 9.4
    Permissible Input Torque ( N.m ) 19.6 49.0 153.9 292.0 292.0 292.0 735.0 1372.0 1764.0 2450
    Max. Load, Required Input Torque ( N.m ) ( H ) 6.2 16.1 48.7 90.7 149.0 238.1 400.1 856.0 1380.5 2040.9
    Max. Load, Required Input Torque ( N.m ) ( L ) 2.9 7.4 20.0 45.3 72.3 124.0 244.0 453.3 761.3 1278.3
    Max. Load, Permissible Input Speed( rpm) ( H ) 750 600 400 300 200 200 200 150 100 100
    Max. Load, Permissible Input Speed( rpm) ( L ) 1200 600 300 300 290 250 180 120 90 70
    Max. Load, Lifting Screw Output Torque( N.m ) 20.1 65.1 201.5 503.6 813.2 1287.7 2531.9 5551.3 8921.8 13878.3
    Remarks: 1: Efficiency is under grease lubrication  2: H: High speed gear ratio  L: Low Speed Gear Ratio    

    Machine Screw Jacks Ordering Information Part Number:

    SJW-050  - US  -  T  -   C -   1/6  -  300   - P
        1               2       3     4      5          6       7    

    1: Jack Model
    SJW-010, SJW-025, SJW-050, SJW-100, SJW-150, SJW-200, SJW-300, SJW-500, SJW-750, SJW-1000.
    Before selecting the jack model, please check above machine screw jacks specifications.

    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)
    machine screw jack
     






      
    3: Screw End Conditions

     
    T: Top Plate H: Clevis End R: Plain End S: Thread End U: Forked Head SH:Spherical Hinge


    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.
    Screw Jack Worm Shaft Input Types
                                           A                                                           B                                                       C
      
    SIJIE Screw Jack Worm Shaft Input Types
                                  M1                                                                              M2                                                                      M3                                                                         M4

    5: Gear Ratio:                                       
    SJW-010: 1/5, 1/20.     SJW-025: 1/5, 1/20.       SJW-050: 1/6, 1/24.      SJW-100: 1/8, 1/24      SJW-150: 1/8, 1/24            
    SJW-200: 1/8, 1/24      SJW-300: 3/32, 1/32.     SJW-500: 3/32, 1/32.     SJW-750: 3/32, 1/32.    SJW-1000: 1/12, 1/36

    6: Travel Stroke   
    No standard travel stroke, all the machine screw jacks’ travel strokes are processed according to customers' requirements.
    SIJIE Screw Jack Travel Stroke   

    7:  Accessories
    P: Protective Tube Standard
    R: Dust Cover( Bellows boot)
    Y: Hand Wheel
    Other accessories,please check below picture
    SIJIE Screw Jack Accessories
    SIJIE Screw Jack Accessories
    SIJIE Screw Jack Accessories

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