screwjacks

Sometimes customers ask"What is the maximum stroke of the screw jack?" Today let's learn something about the long travel of the screw jack. Usually the maximum travel of a single worm screw jack lift is 3-4M. If this length is exceeded, the screw rod is easily to get deformed and bent during use, especially when the jack is used to raise the object. Larger Screw Jacks have their maximum raise / stroke available limited only by the available length of bar stock from suppliers (note - special steel production runs can be organised for special applications) and the practical ability to handle, machine and transport the lead screw and the complete screw jack. Practical lengths will also be affected by whether the screw is to be subjected to compression or tension loads. Depending on diameter the length can be limited due to deformation of material in the machining process or column strength of the screw when subjected to compression loads. If long t...

The worm gear screw lift has a large deviation from the pitch, which is generally caused by wear of the drive gear. If it is a multi-end worm, the positional tolerance of the work piece should be measured with the instrument. If the tolerance exceeds the standard, it should be adjusted in time. Procurement of poor quality bearings is often due to non-uniform die-casting of some points. This is a result of impediments to gear movement. A possible situation with the vibration of the worm gear screw lifter is that the protective cover is too tight when installed, and resonance jitter occurs when the worm gear screw jack moves. When the initial installation is not aligned with the center rectification, direct mounting or the like will cause the worm gear screw jack to shake. The above is the reason why the vibration of the worm gear screw lifter is more common. Only when the cause is found can the vibration of the worm gear screw lift be solved. ...

According to the worm shaft, the slewing drive can be single worm shaft slewing drive and dual worm shaft slewing drive. Compared with single worm slewing drive , the dual worm slewing drive has some advantages. B inocular of SE can reach 2 times tooth contact on the basis of monocular, so that it can have double output torque in the same volume and installation space, which can greatly improve the product performance, and increase double holding torque at the same time. Features of dual worm shaft slewing drive ●Customers have high requirement on torque, such as on the oil drilling platform, has specially designed the dual worm shaft slewing drive. It adopts copper worm gear, and has strong adhesion resistance and big torque. ●Dual worm shaft can drive the slewing bearing at the same time, and have bigger output torque. Its performance is superior to the structure of monocular. Lude Transmission has a series of slewing bearing/ slewing drive for Truck cran...

Our commonly used worm gear screw lifts have a total of four screw top end types: plain end, top plate, threaded, and clevis end. These four functions are different, and customers can choose different end types according to their actual use. Worm gear screw lifts are divided into two types according to the structural form. Type I namely translating type, above four end types are available, Type II,namely rotating type, only plain end and threaded end are available . The reason why the type II has no top plate type and clevis end type is because for the type II copper nut must be installed. After installation, the flange or clevis end can no longer be installed. Now let’s see the functions of the four types of screw top end: Plain end type, can be installed on the fixed bearing; top plate type, can directly lift the object , but the flange also can be connected with other equipment; Threaded end type, can be connected with other equipment through the thread, us...

Lifting platform is a comprehensive application of worm screw jack and bevel gear box . It has extensive applications in practical work. Gerally, SWL screw lift can only lift a single object, or lift a fixed small platform, but for large platforms, can only be achieved by combining multiple screw jacks. For example, there is now a platform with a length of 2.5 meters, a width of 1.6 meters, a load of 35 tons and a lifting speed of 100 mm/min. For such a situation, a single lift must be inoperable. Consider using four 20-ton worm screw lift , three T8 bevel gear boxes, and one 5.5-kW motor, and one reducer to reduce the motor speed and achieve a greater lifting capacity. There are many arrangements to combine the screw jack and the gear box. The simplest is the straight type, followed by the T type, there are U type, H type, H development type, 2H type, two sets, four sets, eight sets can be combined. Even more lifts operate synchronously. Specific but also ...

The electric linear actuator is a device that converts the rotational motion of an electric motor into linear motion (push or pull movement) and it can be used anywhere a machine pushes or pulls a load, raises or lowers a load, roughly positions a load, or rotates a load. It is has similar function as worm gear screw jack. As we have mentioned in early articles , t he trapezoidal worm gear screw jack can be used for sluice gate. In fact, electric linear actuator can also be used for sluice gate, usually it is light duty gate. The following picture shows l ighter duty Stainless Steel or Aluminum frames and blades using a compact controller system and Linear Actuators . Designed especially for On-Farm canal  and irrigation control, Check and Delivery gates, where the heaviest duty frame and actuator system is not required.