Worm gear screw jack ----cost-efficiency and durability

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

Model		LMM1T	LMM2.5T	LMM5T	LMM10T	LMM15T	LMM20T	LMM30T	LMM50T	LMM75T	LMM100T
Maximum Load (T)		1T	2.5T	5T	10T	15T	20T	30T	50T	75T	100T
Outer Diameter of screw (mm)		20	26	40	50	55	65	85	120	130	150
Root Diameter of screw (mm)		14.8	19.7	30.5	38.4	43.4	51.3	67	102	112	127
Screw Pitch (mm)		4	5	8	10	10	12	16	16	16	20
Gear Ratio	H	5	6	6	8	8	8	10.6	10.6	10.6	12
Gear Ratio	L	20	24	24	24	24	24	32	32	32	36
Efficiency %	H	21	21	22	22	20	20	19	15	13	13
Efficiency %	L	12	12	14	15	14	13	11	10	8	8
Permissible max. Power ( KW )	H	0.49	1	2	2.8	3.1	5	8.4	13.4	14.4	21.4
	L	0.36	0.46	0.63	1.4	2.2	3.2	4.6	5.7	7.2	9.4
No-load Torque(N·m)		0.29	0.62	1.4	2	2.6	3.9	9.8	19.6	29.4	39.2
Permissible torque of input shaft (N·m)*		19.6	49	153.9	292	292	292	735	1372	1764	2450
Required torque of input shaft at max. Load (N.m)	H	6.2	16.1	48.7	90.7	149	238.1	400.1	856	1380.5	2040.9
Required torque of input shaft at max. Load (N.m)	L	2.9	7.4	20	45.3	72.3	124	244	453.3	761.3	1278.3
Screw travel length (mm) per turn of worm shaft	H	0.8	0.83	1.33	1.25	1.25	1.5	1.5	1.5	1.5	1.67
Screw travel length (mm) per turn of worm shaft	L	0.2	0.21	0.33	0.42	0.42	0.5	0.5	0.5	0.5	0.56
Permissible max. Input(rpm) when max. load	H	750	600	400	300	200	200	200	150	100	100
Permissible max. Input(rpm) when max. load	L	1200	600	300	300	290	250	180	120	90	70
Screw torque when max. Load (N·m)		20.1	65.1	201.5	503.6	813.2	1287.7	2531.9	5551.3	8921.8	13878.3

screw jack type option

screw top end option

screw worm shaft input option

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.

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)

LMM worm screw jack

Project Description

Worm Gear Screw Jack LMM Technical Date

Application cases of worm drive screw jack