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    Worm Gear Screw Jacks

    SIJIE worm gear screw jacks provide precise positioning, safely self-locking, high performance, and load capacity up to 100 tons. Single jack or multiple jacks system arrangements are available. Standard configurations include translating screw, rotating screw, keyed screw in upright or inverted mounting orientation.

    The unique square groove shell increases the heat dissipation capacity and extended grease life.
    Ductile iron improved the strength and performance of the jack housing.
    Alloy steel input shafts
    ZCuSn10Pb1 tin bronze worm gear
    Tapered roller?bearing or ball thrust bearings offer rugged reliability
    Machined 7e precision trapezoidal screw with heat treatment
    Electric driven( DC motor,AC motor,servo motor,stepper motor) and manual operated available
    Anti-backlash devices, safety nut and Anti-rotation available
    OEM and ODM jacks can be made according to your need

     Get A Quote  Download Drawings
    Worm Gear Screw Jacks Specifications:
     
    Model SJC2.5 SJC5 SJC10 SJC20 SJC50 SJC80 SJC100 SJC200 SJC300 SJC450 SJC700 SJC1000
    Max. Lifting Load ( KN ) 2.5 5 10 20 50 80 100 200 300 450 700 1000
    Screw Diameter ( mm ) 14 18 20 30 40 50 60 80 100 120 140 160
    Thread Pitch ( mm ) 4 4 4 6 7 8 9 12 16 16 20 20
    Gear Ratio H 1/4 1/4 1/4 1/6 1/7 1/8 1/9 1/8.75 1/10.25 1/10.75 1/13.33 1/13.33
    L 1/16 1/16 1/16 1/24 1/28 1/32 1/32 1/35 1/41 1/43 1/40 1/40
    Travel length(mm) per full turn of worm Shaft H 1 1 1 1 1 1 1.125 1.371 1.56 1.49 1.5 1.5
    L 0.25 0.25 0.25 0.25 0.25 0.25 0.281 0.343 0.39 0.37 0.5 0.5
    Starting Efficiency % H 24 24 25 25 18 17 18 17 18 16 16 15
    L 16 16 16 19 11 10 11 11 12 10 11 10
    Working Efficiency % at 1500rpm H 34 34 35 33 32 31 33 33 33 30 31 29
    L 25 25 25 24 23 22 23 22 23 20 21 19
    Max. Permissible power ( KW ) H 0.25 0.30 0.57 1.14 2.2 2.5 3.0 4 7 11.5 18.5 22
    L 0.12 0.15 0.27 0.55 1.1 1.5 2.2 3.5 5.5 5.5 7.5 9.5
    Starting torque at full load ( N.m ) H 3.2 4.2 8 18 48.5 75 100 265 460 675 1050 1620
    L 1.5 1.5 3.1 6.7 20 30 41 106 180 275 510 820
    No-load Torque ( N.m ) H 0.068 0.11 0.29 0.40 0.84 1.85 2.1 2.8 3.8 5.5 8.5 11
    L 0.05 0.09 0.18 0.29 0.59 1.12 1.4 2.1 3.1 4.5 5.5 7.5
    Jack Housing Materials Aluminum Aluminum alloy/Nodular cast iron Nodular cast iron
    Weight without stroke ( kg ) 1.2 3.2 5 8.5 21.5 36 58 75 110 200 400 800
    Weight of screw ( kg ), per 100mm stroke 0.2 0.36 0.50 0.75 1.52 2.44 3.02 4.5 6.8 9.0 12.5 16.5
    Remarks: 1: Efficiency is under grease lubrication  2: H: High speed gear ratio  L: Low Speed Gear Ratio  

    Worm Gear Screw Jacks Ordering Information Part Number:
    SJC100  - US  -  T  -   C -   1/9  -  300   - P
        1            2       3      4        5        6       7   

    1: Jack Model
    SJC2.5, SJC5, SJC10, SJC20, SJC50, SJC80, SJC100, SJC200, SJC300, SJC450, SJC750, SJC1000
    Before selecting the jack model, please check above worm gear 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)

    SIJIE Worm Gear Screw Jacks
                        US                                    IS                                                     UK                                      IK                                          UR                                    IR

     

    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

    Screw Jack Worm Shaft Input Types
                 M1                                                      M2                                                                      M3                                                      M4

    5: Gear Ratio:                                       
    SJC2.5: 1/4, 1/16.      SJC5: 1/4, 1/16.          SJC10: 1/4, 1/16.            SJC20: 1/6, 1/24            SJC50: 1/7, 1/28            SJC80: 1/8, 1/32
    SJC100: 1/9, 1/32     SJC200: 1/8.75, 1/35   SJC300: 1/10.25, 1/41    SJC450: 1/10.25, 1/43   SJC700: 1/13.33, 1/40   SJC1000: 1/13.33, 1/40

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


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

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