machine screw actuators
This machine screw jack has low cost and large stock. It offers positive mechanical action, precise positioning, and uniform lifting speeds. The payloads from 1 ton to 120 ton. A total of 9 sizes are available, each in a traveling nut version and a basic screw translating version.
- Electric Driven and Manual Operated both are available
- Self-locking under static conditions
- Option: Anti-rotation, anti-backlash, safety nut
- Right hand and left-hand screw threads are available
- Standard and custom end fittings, mounting options, and drive shaft
- Several Screw jacks can be synchronised by means of connection shafts and an electronic controller.
- Worm gear machine screw jacks are typically used to move heavy loads in low-duty-cycle setups and low-speed applications.
|Machine Jack Model||SJM2.5|
|Max. Lifting Force ( KN )||25||50||100/150||200||250||350||500||1000||1200|
|Max. Pulling Force( KN )||25||50||99||166||250||350||500||1000||1200|
|Lift Screw( mm )||Tr30×6||Tr40×7||Tr58×12||Tr65×12||Tr90×16||Tr100×18||Tr120×20||Tr160×23||Tr180×25|
|Gear Ratio ( high )||1/6||1/6||3/23||1/8||3/32||3/32||3/32||1/12||1/12|
per full turn of worm Shaft ( H )
|Efficiency % ( H )||23||21||23||21||19||18||15||13||12|
|Gear Ratio ( Low )||1/24||1/24||1/23||1/24||1/32||1/32||1/32||1/36||1/36|
per full turn of worm Shaft ( L )
|Efficiency % ( L )||14||12||15||13||11||11||11||10||8|
|Max. Length of lifting screw (mm)|
when tensile force
|Max. Permissible power|
( KW )
|Lubricant ( kg )||0.1||0.25||0.5||0.75||1.1||1.9||2.2||2.5||2.5|
|Weight without stroke|
( kg )
|Weight of screw ( kg )|
per 100mm stroke
|Max. Permissible power is under the conditions that ambient temperature 20 degree c , duty cycle 20%h and input speed 1500rpm|
SJM Series machine screw jack actuator Ordering Guide Information
SJM – 010 – US – T – C – 1/6 – 300 – Y
1 2 3 4 5 6 7
1: Machine Jack Model
SJM2.5, SJM5, SJM10, SJM20, SJM25, SJM35, SJM50, SJM100, SJM120.
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)
3: Screw Top End
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.
5: Gear Ratio
- SJM2.5: 1/6, 1/24.
- SJM5: 1/6, 1/24.
- SJM10: 3/23, 1/23.
- SJM20: 1/8, 1/24.
- SJM25: 3/32, 1/32
- SJM35: 3/32, 1/32
- SJM50: 3/32, 1/32
- SJM100: 1/12, 1/36
- SJM120: 1/12, 1/36.
6: Travel Stroke
N: Standard Jack, No additional accessories
P: Protective Tube
R: Dust Cover
Y: Hand Wheel
Other accessories,please check below picture
Sijie Indutrial has been supplied electric machine scew jacks, actuators and lifting system since 2008.
- Has the unique ability to provide complete jack system lifting solutions with 3D models.
- Providing “turn key” solutions with the optimal balance of performance, life, and cost.
- Wide application experience in diverse industries including transportation, packaging, factory automation, material handling, printing, automotive, machine tool, paper, steel, food and beverage etc.
You can trust us on high quality, on-time delivery, controlled costs and reduced risk. Let us help you.