Screw Jack

Smoothy Screw Jack


Extremely compact, lightweight, and easy-to-use jacks, delivering high performance similar to standard screw jacks


  • – Capacity: 2kN/5kN
  • – The lightest weight possible is achieved, while securing sufficient strength.
  • – The housing is compact and space-efficient; and its shape and mounting holes are designed to allow either its upper or lower surface to be attached to your device.
  • – Conserves space as steel spheres and return tubes are not required.
  • – We can also manufacture a jack with anti-rotation mechanism which prevents its lifting screw from drag turning.
  • – Wide-ranging options are available, including dustproof bellows to protect the lifting screw, limit switch for control, and RC encoder.
  • – Maintenance-free design (disassembly of components inside of the housing is not allowed); however, please apply grease to the lifting screw on a regular basis.
  • – The jack does not have a self-locking function, so it is required to install a brake.
  • – A smoothy screw, consisting of a self-lubricating nut and stainless screw shaft is also available as a stand-alone product.


Series/Size Code RMS RSS
Capacity 2kN 5kN
Lifting screw diameter 16mm 20mm
Lifting screw lead 5mm 5mm
Worm gear ratio H 3 5
L 24
Effciency H 0.37 0.35
L 0.20
Maximum allowable power per jack 0.2kW 0.2kW
Input shaft torque at no load (b) 0.07N・m 0.15N・m
Torque coefficient (a) H 0.72 0.45
L 0.16
Required input torque at maximum load H 1.5N・m 2.4N・m
L 1.0N・m
Speed coefficient (c)
(screw lead per rotation of input shaft)
H 1.67mm 1mm
L 0.2mm
Maximum allowable input rotation speed H 1290min-1 1500min-1
L 1500min-1
Maximum input rotation speed at maximum load H 1500min-1 760min-1
L 1500min-1
Anti-rotation key torque at maximum load 1.5N・m 3.6N・m
Input shaft allowable overhang load 120N 300N
Amount of filled grease Maintenance-Free Maintenance-Free
Operating temperature range -15〜60℃ -15〜60℃

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