THK Linear Motion Rails And Blocks
The THK linear motion rails and blocks system is designed to maximize the contact area between the fixed component and the moving component, which not only increases the load carrying capacity of the system, but also withstands the impact force generated by intermittent cutting or gravity cutting, so that the force is widely spread. The area of bearing capacity has been expanded.
The use of THK linear motion rails and blocks is very flexible because it uses a rolling method, which
greatly reduces the friction between the carrier and the track, so that the carrier can be linearly moved
regularly, and the track The hazard is also small and, more importantly, it can withstand relatively large
During installation, even if the mounting surface is not absolutely flat, it will not affect the installation.
This is mainly because the steel balls of the THK linear motion rails can be moved and elastically
deformed, and the contact portion between the guide rail and the mounting surface can be transferred
within a certain range. The self-aligning capability of the THK linear motion rails allows the loader to slide
freely on the track. The resistance is small and the motion accuracy is high.
THK linear motion rails are interchangeable. At present, Tlinear motion rails are produced with
relevant standards, and the dimensional error should meet the standard requirements. In addition, the
slider of the guide rail is designed with a retainer to prevent the steel ball from slipping off the track.
In general, for a series of THK linear motion rails, the accuracy can be used interchangeably within this
series. That is to say, although the guide rail and the slider are a whole, the user can order separately
according to actual needs when ordering, which is more important in the later use. If something goes
wrong, replace the broken part.
The function of the THK linear motion blocks is to support and guide the moving parts to make a
reciprocating linear motion in a given direction.
The THK linear motion blocks place rolling elements such as balls, rollers, and needle rollers between
the guide surfaces to make the sliding friction between the guide surfaces become rolling friction.
With the continuous development of modern manufacturing technology, the traditional
manufacturing industry has undergone tremendous changes. Numerical control technology, mechatronics
and industrial robots have been more widely used in production. At the same time, the positioning
accuracy, guiding precision and feed speed of the mechanical transmission mechanism are constantly
increasing, and the traditional THK linear motion blocks guiding mechanism has undergone major
The performance characteristics of the THK linear motion blocks, the movement of the rolling linear
guide is realized by the rolling of the steel ball, the frictional resistance of the guide rail is small, the
difference between the static and dynamic frictional resistance is small, and the crawling is not easy at low
speed. Repeated positioning accuracy is suitable for moving parts that are frequently activated or
reversed. The machine positioning accuracy can be set to the ultra-micron level. At the same time,
according to the need, the preload is appropriately increased to ensure that the steel ball does not slip,
achieve smooth motion, and reduce the impact and vibration of the motion. For fluid lubrication of the
sliding guide surface, the motion accuracy error caused by the floating of the oil film is unavoidable. In
most cases, fluid lubrication is limited to the boundary area, and direct friction caused by metal contact is
unavoidable, in which a large amount of energy is wasted by friction loss.
Due to the strict control of production precision, THK linear motion blocks can be kept at a certain
level, and the slider has a retainer design to prevent the steel balls from falling off. Therefore, some series
of precisions are interchangeable, and customers can order them as needed. THK linear motion rails and
blocks can also store linear motion rails and blocks separately to reduce storage space.