Project Description

This worm screw jack load capacity from 1 ton to 100 ton. Very precise and reliable, it can meet all the necessary safety, cost-efficiency, and durability mandates of your application.

  • Drive method: Electric worm screw jack by motor and manual worm screw jack by handwheel
  • Trapezoidal spindle, Ductile iron housings, taper roller bearings provide rugged reliability, high strength bronze worm gear
  • Version: upright or inverted, traveling nut or screw translating
  • Option: Anti-rotation, anti-backlash, safety nut, left-hand screw threads

You can trust us on high quality, on-time delivery, controlled costs and reduced risk

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 Worm Gear Screw Jack LMM Technical Date

ModelLMM1TLMM2.5TLMM5TLMM10TLMM15TLMM20TLMM30TLMM50TLMM75TLMM100T
Maximum Load (T)1T2.5T5T10T15T20T30T50T75T100T
Outer Diameter of screw (mm)20264050556585120130150
 Root Diameter of screw (mm)14.819.730.538.443.451.367102112127
Screw Pitch (mm)45810101216161620
Gear RatioH56688810.610.610.612
L20242424242432323236
Efficiency %H21212222202019151313
L121214151413111088
Permissible max. Power ( KW )H0.49122.83.158.413.414.421.4
L0.360.460.631.42.23.24.65.77.29.4
No-load Torque(N·m)0.290.621.422.63.99.819.629.439.2
Permissible torque of

input shaft (N·m)*

19.649153.9292292292735137217642450
Required torque of input

shaft at max. Load (N.m)

H6.216.148.790.7149238.1400.18561380.52040.9
L2.97.42045.372.3124244453.3761.31278.3
Screw travel length (mm)

per turn of worm shaft

H0.80.831.331.251.251.51.51.51.51.67
L0.20.210.330.420.420.50.50.50.50.56
Permissible max. Input(rpm)

when max. load

H750600400300200200200150100100
L12006003003002902501801209070
Screw torque when

max. Load (N·m)

20.165.1201.5503.6813.21287.72531.95551.38921.813878.3

screw jack type option

worm screw jack type

screw top end option

worm jack top end

screw worm shaft input option

screw jack worm shaft type

LMM Jack Order Guide

LMM  Model NO— screw jack type – top end type – worm shaft type – gear ratio – travel length – necessories(limit swith/bellow)

  •  If the mechanical lifting worm jack is loaded in compression. It may be necessary to select a jack with a load greater than the nominal. This is due to the relationship of the diameter to the maximum spindle length. You can consult our engineering for analysis of the applied force.
  •  As the duty cycles are intermittent, there is an inverse relationship in relation to the maximum duty cycle of the actuators and the load being moved.Please consult our application engineers for assistance in determining the most suitable worm jack.
  • The input RPM must not exceed the value in the table.
  • Never exceed the static and dynamic capacity of the jack.
  • Never exceed the power listed in our specification tables.
  • If the maximum power recommendation is exceeded, reduce the speed or use a larger capacity jack.
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Application cases of worm drive screw jack

You can benefit from our wide application experience in diverse industries including transportation, packaging, factory automation, material handling, printing, automotive, machine tool, paper, steel, food, and beverage etc.

worm gear screw jack application
worm screw jack application
worm drive screw jacks

Please share with us your project details, then we can provide a complete worm screw jack lifting solutions with 3D models. The necessary information includes:

  • Total load (KN)
  • Effective stroke (mm)
  • Load of each actuator (if more than one is required)
  • Load type (tension, compression, guidance, no guidance)
  • Speed request (mm/min)
  • Duty cycle
  • Applicable ambient temperature (-20º to 50ºC)