As opposed to the worm drive systems discussed here, a bevel equipment system could be used to convert rotation to linear movement. This would offer greater performance to a machine screw jack because of it making a rolling contact as opposed to the sliding contact of worm drive elements. It could, nevertheless, come at a larger initial cost and will not cover as better ratio range as worm drives.
Also called power screws, lead screws come with several different types of thread profile which are suitable for different applications. Acme business lead screws are defined by their trapezoidal thread profile and 29° flank position and are commonly within 
American Imperial machine screw jacks. An alternative solution to the Acme business lead screw in a machine screw jack would be a square lead screw.
European or other worldwide screw jacks utilise a trapezoidal lead screw with a 30° flank angle and complies to an ISO metric regular.
Ball screw jacks require the thread of the business lead screw to possess a profile which allows for the travel of the balls. To improve load distribution and minimise put on, the ball screw monitor has a gothic arch profile.
Reputation of the trapezoidal screw thread originates from the fact that it is easier to machine and is therefore less expensive than square and ball screw thread forms. Additionally, due to the large region of contact between the business lead screw threads and the worm wheel, there is definitely a big load carrying capability. This outcomes in high friction which can be harmful to efficiency but does mean the system is much more likely to be self-locking. This low performance implies that such screw jacks are more suited to non-continuous or intermittent operation.
Many applications usually do not warrant the excess expenditure of a ball screw jack since they usually do not require continual drive. In configuring a screw jack a screw jack china prediction is constructed of the frequency of actuation and this will stage to the appropriate screw jack to end up being selected.
Translating Design Jacks are most often selected. With this style, a driven input worm acts on an interior worm gear leading to the lifting screw to extend or retract. Operation needs that rotation of the lifting screw end up being prevented. This rotation it restrained whenever two or more jacks are linked with the same load.
Keyed Style Jacks are utilized any time rotation of the lifting screw isn’t restrained. For instance, when you need to lift the jack to meet up a load. This is one way they work: An integral, set to the jack casing and inserted into a keyway milled in to the amount of the lifting screw forces the lifting screw to translate without rotating.
Keyed For Travelign Nut Style Jacks (KFTN) are another option. These jacks have a fixed size lifting screw that rotates. Loads are mounted on a flanged “touring” nut that translates along the space of the rotating screw. This kind of jack is well suited for applications that cannot support a screw safety tube or that require a flush mount
The worm wheel acts on your golf ball screw (via the ball nut) which actuates the lead screw. This technique offers greater performance between the input and the useful result weighed against a machine screw jack. In addition, it allows for better actuation speeds and, because of the low friction, is very durable. Nevertheless a ball screw jack is not inherently self-locking and, as a consequence of its enhanced precision components, the initial outlay is better. The resulting improved performance however implies this could be offset against smaller sized drive train elements and a significant decrease in the necessary power.