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  • SJM2.5 Machine Screw Jack

    • SJM2.5 Machine Screw Jack

    Introduction：
    China Machine Screw Jack Manufacturers, 2-5 ton screwjacks

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    SJM2.5 Machine Screw Jack Quick Information:
    1. Jack Model: SJM2.5
    2. Screw Diam.: 30mm 
    3. Screw Pitch: 6mm 
    4. Max load capacity: 25KN
    5. Speed Ratio: 1/6, 1/24
    6. Max permissible power: 1.45KW
    7. Screw Top End: Top Plate,Clevis End,Threaded End,Plain End, Forked Head and Spherical hinge.
    8. Translating screw, rotating screw, keyed screw configurations in upright or inverted mounting orientation.
    9. Power Source: Electric Driven,Manual Operated or Both Are Available
    10. Screw Type: Trapezoidal Screw 
    11. Individually or multiple screw jack lift system arrangements are available
    12. Precisely positioning, self-locking trapezoidal screw which supports the loads and hold position with no need to employ brake mechanism or other locking systems.


    SJM2.5 Machine Screw Jack Applications: 


    SJM2.5 Machine Screw Jack Specifications:

    Jack Model SJM2.5
    Max. Lifting Force ( KN ) 25
    Max. Pulling Force( KN ) 25
    Lift Screw Size( mm ) Tr30×6
    Gear Ratio ( H ) 1/6
    Travel length(mm) per full turn of worm Shaft ( H ) 1.0
    Efficiency % ( H ) 23
    Gear Ratio ( L ) 1/24
    Travel length(mm) per full turn of worm Shaft ( L ) 0.25
    Efficiency % ( L ) 14
    Max. Length of lifting screw (mm), when tensile force 1500
    Max. Permissible power ( KW ) 1.45
    Lubricant ( kg ) 0.1
    Weight without stroke ( kg ) 7.3
    Weight of screw ( kg ), per 100mm stroke 0.45
    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℃.


    SJM2.5 Machine Screw Jack ( Tr30×6)
    Speed (rpm)   Lifting Speed (mm/min) F=25KN F=20KN F=15KN F=10KN
    H L H L H L H L
    18 N.m 7.1 N.m 14 N.m 5.7 N.m 11 N.m 4.3 N.m 6.9N.m 2.9N.m
    H:1/6 L:1/24 (KW) (KW) (KW) (KW) (KW) (KW) (KW) (KW)
    1500 1500 375 2.7 1.2 2.2 0.89 1.7 0.67 1.1 0.45
    1000 1000 250 1.8 0.74 1.5 0.60 1.1 0.45 0.72 0.30
    750 750 187.5 1.4 0.56 1.1 0.45 0.82 0.33 0.54 0.22
    500 500 125 0.91 0.37 0.72 0.30 0.54 0.22 0.36 0.15
    300 300 75 0.54 0.22 0.43 0.18 0.33 0.13 0.22 0.09
    200 200 50 0.36 0.15 0.29 0.12 0.22 0.09 0.14 0.06
    100 100 25 0.18 0.07 0.14 0.06 0.11 0.05 0.07 0.05
    50 50 12.5 0.09 0.05 0.07 0.05 0.05 0.05 0.05 0.05
      Speed (rpm)   Lifting Speed (mm/min) F=5KN F=2.5KN F=1KN  
    H L H L H L    
    3.5 N.m 1.4 N.m 1.7 N.m 0.71 N.m 11 N.m 4.3 N.m    
    H:1/6 L:1/24 (KW) (KW) (KW) (KW) (KW) (KW)    
    1500 1500 375 0.54 0.22 0.27 0.11 0..11 0.05    
    1000 1000 250 0.36 0.15 0.18 0.07 0.07 0.05    
    750 750 187.5 0.27 0.11 0.14 0.06 0.05 0.05    
    500 500 125 0.18 0.07 0.09 0.05 0.05 0.05    
    300 300 75 0.11 0.05 0.05 0.05 0.05 0.05    
    200 200 50 0.07 0.05 0.05 0.05 0.05 0.05    
    100 100 25 0.05 0.05 0.05 0.05 0.05 0.05    
    50 50 12.5 0.05 0.05 0.05 0.05 0.05 0.05    


    Design, produce and testing:  

     


    SJM-2.5 Machine Screw Jack Ordering Information:


    1: Jack Model SJM2.5: 

    Max. Load capacity is 25KN


    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 Top End

       T: Top plate     H: Clevis end    S: Thread end     R: Plain end    SH: Spherical hinge  U: Forked head
    5


    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.
    IMG_256


    5: Gear Ratio:                                       
    SJM2.5 machine screw jack gear ratio includes 1/6, 1/24
    1/6: Fast speed, 1mm travel length per full turn of worm shaft.                 
    1/24: Low speed, 0.25 travel length per full turn of worm shaft


    6: Travel Stroke
    IMG_256


    7:  Accessories
    N: Standard Jack, No additional accessories
    P: Protective Tube
    R: Dust Cover
    Y: Hand Wheel
    Other accessories,please check below picture



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