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    Worm Gear Ball Screw Jacks

    SIJIE worm gear ball screw jacks are suitable for SIJIE worm gear ball screw jacks are suitable for high precision, high efficiency, high duty cycle, high performance, high-frequency operation, the major components include TBI ball screw and high precision worm gear. Worm gear ball Screw Jacks can be used individually or as part of a larger mechanical system and require less power to drive the load. Because of no self-locking function, a worm gear ball screw jack needs a brake motor or external locking device to hold the position.

    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
    Top plate, clevis end, thread end, plain end standard
    Translating screw, rotating screw, keyed screw configurations in upright or inverted mounting orientation
    SIJIE can customize to your specifications

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      Worm Gear Ball Screw Jacks Specifications
     
    Model SJD10 SJD11 SJD12 SJD20 SJD21 SJD22 SJD50 SJD51 SJD80 SJD81 SJD100 SJD101
    Max. Lifting Load ( KN ) 10 12 7 18 24 19 50 39 60 57 67 98
    Screw Diameter and Lead ( mm ) Ø20x5 Ø20x10 Ø20x20 Ø32x5 Ø32x10 Ø32x20 Ø40x10 Ø40x20 Ø50x10 Ø50x20 Ø63x10 Ø63x20
    Gear Ratio H 1/4 1/4 1/4 1/6 1/6 1/6 1/7 1/7 1/8 1/8 1/8 1/8
    L 1/16 1/16 1/16 1/24 1/24 1/24 1/28 1/28 1/32 1/32 1/32 1/32
    Travel length(mm) per full turn of worm Shaft H 1.25 2.50 5.00 0.83 1.67 3.34 1.43 2.86 1.25 2.50 1.25 2.5
    L 0.31 0.62 1.24 0.21 0.42 0.84 0.36 0.72 0.31 0.62 0.31 0.62
    Starting Efficiency % H 35 35 35 32 32 32 33 33 32 32 34 34
    L 22 22 22 20 20 20 20 20 20 20 22 22
    Working Efficiency % at 1500rpm H 59 59 59 58 58 58 59 59 58 58 58 58
    L 42 42 42 39 39 39 39 39 39 39 39 39
    Max. Permissible power ( KW ) H 0.57 0.57 0.57 1.14 1.14 1.14 2.2 2.2 2.5 2.5 3.0 3.0
    L 0.27 0.27 0.27 0.55 0.55 0.55 1.1 1.1 1.5 1.5 2.2 2.2
    Starting torque at full load ( N.m ) H 5.6 13.4 15.6 7.4 18.9 31.5 35.5 51.4 37.3 70.9 41.7 136.8
    L 2.2 5.3 6.2 2.9 7.9 12.6 14.2 22.2 14.9 28.4 16.7 54.7
    No-load Torque ( N.m ) H 0.29 0.29 0.29 0.40 0.40 0.40 0.84 0.84 1.52 1.52 2.1 2.1
    L 0.18 0.18 0.18 0.29 0.29 0.29 0.59 0.59 1.12 1.12 1.4 1.4
    Jack Housing Materials Nodular cast iron
    Weight without stroke ( kg ) 6 6 6 9.5 9.5 10 23 24 38 40 62 64
    Weight of screw ( kg ), per 100mm stroke 0.5 0.5 0.5 0.8 0.8 0.8 1.5 1.5 2.5 2.5 3.2 3.2
    Remarks: 1: Efficiency is under grease lubrication  2: H: High speed gear ratio  L: Low Speed Gear Ratio  

    Worm Gear Ball Screw Jacks Ordering Information Part Number:

    SJD100  - US  -  T  -   C -   1/8  -  300   - P
        1             2       3      4      5         6          7  

    1: Jack Model
    SJD10, SJD11, SJD12, SJD20, SJD21, SJD22, SJD50, SJD51, SJD80, SJD81, SJD100, SJD101
    Before selecting the jack model, please check above worm gear ball 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)

    Worm Gear Ball 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.

                            A                                                           B                                                       C


          M1                                                    M2                                                              M3                                                      M4

    5: Gear Ratio:                                       
    SJD10: 1/4, 1/16.      SJD11: 1/4, 1/16.      SJD12: 1/4, 1/16.      SJD20: 1/6, 1/24.      SJD21: 1/6, 1/24       SJD22: 1/6, 1/24  
    SJD50: 1/7, 1/28.      SJD51: 1/7, 1/28.      SJD80: 1/8, 1/32       SJD81: 1/8, 1/32.      SJD100: 1/8, 1/32      SJD101: 1/8, 1/32

    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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