The difference between linear bearing and sliding plain bearing

The difference between linear bearing and sliding plain bearing

Sliding bearing, in short, is a bearing in which the journal and the bearing bush work under sliding friction. The sliding bearing works smoothly, reliably and without noise. The rolling bearing we generally use has a rolling body, and the sliding bearing is the direct friction of the journal and the bearing bush, so it is sliding friction.

Linear bearings are linear motion systems used for linear strokes in conjunction with cylindrical shafts. Since the bearing ball is in contact with the bearing shell, the steel ball rolls with the minimum frictional resistance. Therefore, the linear bearing has small friction and is relatively stable, and does not change with the bearing speed, and can obtain a smooth linear motion with high sensitivity and high precision. Linear bearing consumption also has its limitations. The most important thing is that the bearing impact load capacity is poor, and the bearing capacity is also poor. Secondly, the linear bearing has large vibration and noise during high-speed motion.

In rolling bearings, the bearing rings are separated by a tumble unit (roller); in a sliding guide system, the movable portion slides over a static rail or shaft. Depending on the type of track system, the sliding layer is on a moving or rigid component. Smooth oil is embedded in the sliding layer for smoothing purposes.

Sliding bearings are linear positioning bearings with an infinite stroke length. These linear support systems may be sliding support systems that include a bearing/slider system and a sliding layer that does not require protection.

The plate-supporting system is an auxiliary system for protecting the sliding layer on the guide rail with extremely low requirements. The sliding assisting system is almost wear-free, has a high static load carrying capacity, is insensitive to impact loads and pollution, has low noise, and has no stick-slip phenomenon. The sliding assist system without protection does not require smooth, low protection required materials, and good extreme working characteristics. Because of its versatile nature, the sliding assist system is used in many applications, in particular requiring no protection or low protection, where there is a lack of smooth oil or where smooth oil cannot be used.

The service life of the sliding assist system depends on the load, sliding speed, temperature and duty cycle. There are a number of rated limiting factors, including contamination, corrosion from dry work, or sleek lack of smoothing agent aging. Therefore, the basic rating life is for reference only.

Many external influences on sliding bearings cannot be estimated. Therefore, the service life of the tested support system under working conditions is the most accurate and reliable.
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