Manual Screw Jack is composed of hand wheel or hand crank and a worm gear screw jack.It is ideal solutions for applications where electricity or power generators is inconvenient or dangerous.

Manual Screw Jack is ideal solutions for applications where electricity or power generators is inconvenient or dangerous, light weight, low duty cycle, low target cost and short travel length.

screw jack is a gearbox assembly (either worm gear or bevel gear) and a transmission product (lead screw, ball screw or roller screw) which through use of a motor is used to convert rotary into linear motion.

Crank table is an common appliance of Hand-operated Screw Jack. We offer 2.5ton  and 5ton screw jack mechanism now.

Lifting table is an common appliance of Hand Crank Screw Jack . We offer 1ton, 2.5ton and 5ton screw jack mechanism.

SWL series worm wheel screw elevator is a basic lifting parts, in line with JB/T8809 -- 2010 (original JB/T8809 -- 1998, JB/ZQ4391 -- 86) standards. Carrying capacity 2.5 -- 120T. It has the advantages of compact structure, small volume, light weight, wide power source, low noise, convenient installation, flexible use, many functions, many supporting forms, high reliability and long service life. SWL series worm gaer screw jack is a kind of basic lifting equipment, which is widely used in machinery, metallurgy, chemical industry, medicine, construction, water conservancy, culture and other industries.

Worm Gear screw jack is a kind of basic lifting equipment.

Trapezoidal Screw may be used individually or in multiple arrangements . there are no “ standard “ travel lengths and each Worm Gear Screw Jack is built to specification . The jack housings are made of ductile iron and proportioned to support the rated capacity of the unit . models have aluminum housings . This is jack incorporates an alloy steel worm which drives a high strength bronze worm gear ( drive sleeve ) . The worm shaft is supported on anti - friction tapered roller bearings with external seals provided to prevent loss of lubrication . The drive sleeve is supported on anti-friction tapered roller or ball thrust bearings . rotation of the drive sleeve causes the lifting screw to translate or rotate , depending upon jack configuration .

worm gear screw jack SWL5 two screw jacks linkage in manual screw jacks system

JWB Series Ball Screw jacks are suitable for high speed , high efficiency and excellent performance .

Main data: 1.Maximum static lifting force 5 tons.  2. Screw diameter 40 mm, lead 7 mm. 3. Worm gear ratios 1/6, 1/24. 4. Gearbox sizes 210x158x128mm 5. Center height 61.5mm, center distance 56mm 6. Worm shaft diameter 20mm Features: SWL screw jack is suitable for low speed and low frequency. Main components:Precision trapezoid screw pair and high precision worm-gear pair. 1.Economical: Compact design,easy operation,convenient maintenance. 2.Low speed and low frequency Be suitable for heavy load,low speed,low service frequency. 3.Self-lock Trapezoidal screw has self-lock function,it can hold up load without braking device when screw stops traveling. 4. Widely applied in industries such as machinery, metellurgy, construction and hydraulic equipment. 5. Top End: top plate, clevis end, threaded end, plain end