THK Linear Guide Bearing
The THK linear guide bearing plays a supporting role when the shaft rotates. The THK linear guide bearing has a ball or roller type device that reduces friction.
What is the relationship between the shaft and the THK linear guide bearing?
The THK linear guide bearing plays a supporting role when the shaft rotates. The THK
linear guide bearing has a ball or roller type device that reduces friction.
A shaft is a cylindrical object that is worn in the middle of a bearing or in the middle of a
wheel or in the middle of a gear, but a few are square. A shaft is a mechanical part that
supports a rotating part and rotates therewith to transmit motion, torque or bending
moments. Generally, it is a metal rod shape, and each segment can have a different diameter.
The parts of the machine that make a swivel motion are mounted on the shaft.
THK linear guide bearing bearing function:
In terms of its role, it should be support, that is, literal interpretation is used for the
bearing shaft, but this is only part of its function, and its essence is to be able to bear the
radial load. It can also be understood that it is used to fix the shaft. The THK linear guide
bearing is a fixed shaft that allows it to rotate only while controlling its axial and radial
movement. If the motor has no bearings, it will not work at all. Because the shaft can move in
any direction, and the motor requires the shaft to rotate only when it is working. In theory, it
is impossible to realize the function of the transmission. In addition, the bearing will also
affect the transmission. In order to reduce this effect, good lubrication must be achieved on
the bearings of the high-speed shaft. Some bearings have been lubricated, called pre-
lubricated bearings. Most bearings must have lubricating oil, which is responsible for not only
increasing energy consumption due to friction during high-speed operation, but also
horrifying is that it is easy to damage the bearing. The idea of turning sliding friction into
rolling friction is one-sided because there is something called a sliding bearing.
Lubrication of rolling bearings reduces friction and wear inside the bearing, prevents
burning; prolongs its service life; discharges friction heat and cooling, prevents bearing
overheating, prevents aging of lubricating oil itself, and prevents foreign matter from
intruding into the bearing or preventing rust and corrosion. The effect.
The lubrication method of THK linear guide bearing is divided into grease lubrication and
oil lubrication. In order for the THK linear guide bearing to function well, first of all, it is
necessary to select a lubrication method suitable for the conditions of use and purpose of
use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease
lubrication has the advantage of simplifying the structure around the bearing and comparing
the advantages and disadvantages of grease lubrication and oil lubrication. Pay special
attention to the amount of lubrication, whether it is oil lubrication or grease lubrication, too
little lubrication does not fully affect the bearing life, too much amount will produce large
resistance, affecting the speed.
THK linear guide bearing seals can be divided into self-contained seals and external seals.
The so-called bearing self-contained seal is to manufacture the bearing itself into a device
with sealing performance. Such as bearings with dust cover, sealing ring and so on. The
sealing space is small, the installation and disassembly are convenient, and the cost is
relatively low. The so-called bearing-inserted sealing performance device is a sealing device
having various properties manufactured inside a mounting end cap or the like. Bearings and
seals are divided into non-contact seals and contact seals. Among them, the non-contact seal
is suitable for high speed and high temperature applications, and has different structure
forms such as gap type, labyrinth and washer type. Contact seals are suitable for medium and
low speed working conditions, and are commonly used in the form of felt seals and cup seals.
According to the working condition of the THK linear guide bearing and the working
environment, the sealing degree is often used in engineering design to achieve better sealing
effect. The choice of bearing seals should consider the following main factors:
1, THK linear guide bearing lubricants and types (grease and lubricant).
2, THK linear guide bearing working environment, occupying the size of the space.
3. Advantages of the support structure of the shaft, allowing angular deviation.
4. The circumferential speed of the sealing surface.
5, THK linear guide bearing operating temperature.
6. Manufacturing costs.
I think that the shaft and the THK linear guide bearing have a static fit relationship in the
assembly. The shaft is supported by the bearing to be able to move in that direction, and the
shaft can be rotated by the bearing characteristic. From the name, the bearing is the bearing