Screw Jack

Small 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.
  • – The jack consists of a high-precision worm gear and a trapezoidal screw; and its self-locking function works at any position within a stroke.
  • – Wide-ranging options are available, including dustproof bellows to protect the lifting screw, limit switch for control, and RC encoder.

Standard features

Series/Size Code RMG RSG
Capacity 2kN 5kN
Lifting screw diameter 16mm 20mm
Lifting screw lead 3mm 4mm
Worm gear ratio H 3 5
L 24
Effciency H 0.22 0.22
L 0.13
Maximum allowable power per jack H 0.32kW 0.63kW
L 0.25kW
Input shaft torque at no load (b) 0.07N・m 0.15N・m
Torque coefficient (a) H 0.73 0.57
L 0.21
Required input torque at maximum load H 1.5N・m 3.0N・m
L 1.2N・m
Speed coefficient (c)
(screw lead per rotation of input shaft)
H 1.0mm 0.8mm
L 0.17mm
Maximum allowable input rotation speed H 2000min-1 2000min-1
L 2000min-1
Maximum input rotation speed at maximum load H 2000min-1 2000min-1
L 2000min-1
Anti-rotation key torque at maximum load 3.5N・m 7.5N・m
Input shaft allowable overhang load 120N 300N
Amount of filled grease Maintenance-Free Maintenance-Free
Operating temperature range -15〜80℃ -15〜80℃

Documents and data Downloads

Other Downloads