1.Performance Table
2.Main features for acme screw jack
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
The electric linear actuator is a real power pack. As usual a critical installation space and lowest possible price are the basic constants of our design.
Ball screw jacks combine the gear unit with a linear drive performed by a ball screw that, in comparison with the traditional acme screw, offers following advantages:
• higher total efficiency
• longer life of the whole linear drive system
The following two comparative examples give an idea of the higher efficiency that can be obtained with this system:
• considering a screw jack consisting of a worm gear with linear drive performed by an acme screw,
the total efficiency of the screw jack is between 10 % and 40 %
• considering a screw jack consisting of a worm gear with linear drive performed by a ball screw, the
total efficiency of the screw jack is between 30 % and 70 %
Our Ball screw jacks are available in two different models:
• travelling screw (Model A,namely translating type)
• travelling nut (Model B,namely rotating type)
Manual Screw Jack is made up of hand wheel or hand crank and a worm gear screw jack.
It is suitable for applications where
electricity or power generators is inconvenient or dangerous, light
weight, low duty cycle, low target cost and short travel length.
