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    Motorized Screw Jacks

    SIJIE motorized screw jack ( also called electric screw jack) offers the most economic solutions for a wide range of industrial applications and the load capacity up to 120-ton as standard. The electric screw jacks have the self-locking function which supports the load and holds the position with no need to employ a brake mechanism or other locking system.

    Suitable for heavy loads in low-duty-cycle setups and low-speed applications
    Single jack or multiple jacks system arrangements are available.
    Anti-backlash devices, safety nut, and Anti-rotation are available.
    Top plate, clevis end, thread end, plain end, forked head standard.

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    Motorized Screw Jacks Specifications
    Jack Model SJM-1T SJM-2.5T SJM-5T SJM-10/15T SJM-20T SJM-25T SJM-35T SJM-50T SJM-100T SJM-120T
    Max. Lifting Force ( KN ) 10 25 50 100/150 200 250 350 500 1000 1200
    Max. Pulling Force( KN ) 10 25 50 99 166 250 350 500 1000 1200
    Lift Screw Size( mm ) Tr24x4 Tr30×6 Tr40×7 Tr58×12 Tr65×12 Tr90×16 Tr100×18 Tr120×20 Tr160×23 Tr180×25
    Gear Ratio ( H ) 1/6 1/6 1/6 3/23 1/8 3/32 3/32 3/32 1/12 1/12
    Travel length(mm) per full turn of worm Shaft ( H ) 0.67 1.0 1.167 1.565 1.5 1.5 1.69 1.87 1.92 2.083
    Efficiency % ( H ) 24 23 21 23 21 19 18 15 13 12
    Gear Ratio ( L ) 1/24 1/24 1/24 1/23 1/24 1/32 1/32 1/32 1/36 1/36
    Travel length(mm) per full turn of worm Shaft ( L ) 0.17 0.25 0.292 0.5 0.5 0.5 0.56 0.625 0.638 0.694
    Efficiency % ( L ) 15 14 12 15 13 11 11 11 10 8
    Max. Length of lifting screw (mm), when tensile force 1000 1500 2000 2500 3000 3500 4000 5500 6500 7000
    Max. Permissible power ( KW ) 0.65 1.45 2.59 3.47 4.02 5.38 13.06 13.9 28.5 62
    Lubricant ( kg ) 0.08 0.1 0.25 0.5 0.75 1.1 1.9 2.2 2.5 2.5
    Weight without stroke ( kg ) 2.5 7.3 16.2 25 36 70.5 87 420 1010 1350
    Weight of screw ( kg ), per 100mm stroke 0.30 0.45 0.82 1.67 2.15 4.15 5.20 7.45 13.6 17.3
    Remarks:
    1: H: high ratio, L: low ratio.
    2: Max. Permissible power is under the conditions that ambient temperature 20 degree c , duty cycle 20%h and input speed 1500rpm.
    3: Efficiency is under grease lubrication.
    4: Working temperature is -20℃-+80℃.
    5: Self-locking under static conditions.
     

    Motorized Screw Jacks Ordering Information Part Number:
    SJM-5T  - US  -  T  -   C -   1/6  -  300   - P
        1            2       3      4       5         6        7    

    1: Jack Model
    SJM-1T, SJM-2.5T, SJM-5T, SJM-10T, SJM-15T, SJM-20T, SJM-25T, SJM-35T, SJM-50T, SJM-100T, SJM-120T. 
    Before selecting the jack model, please check above motorized 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)
     
                           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.

                            A                                                           B                                                       C


              M1                                              M2                                                                  M3                                            M4

    5: Gear Ratio:                                       
    SJM-1T: 1/6, 1/24.        SJM-2.5T: 1/6, 1/24.       SJM-5T: 1/6, 1/24.        SJM-10T: 3/23, 1/23.     SJM-15T: 3/23, 1/23     SJM-20T: 1/8, 1/24
    SJM-25T: 3/32, 1/32.    SJM-35T: 3/32, 1/32.      SJM-50T: 3/32, 1/32.    SJM-100T: 1/12, 1/36    SJM-120T: 1/12, 1/36

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



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


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