Slide Bearing VS Ball Bearing How to Choose [Quick]

time2018/11/06

: Slide bearing vs ball bearing, due to the contact between the balls, the ball bearings need to have lubrication. Therefore, this makes them more vulnerable.

Slide Bearing VS Ball Bearing How to Choose [Quick]

Slide bearing vs ball bearing, due to the contact between the balls, the ball bearings need to have lubrication. Therefore, this makes them more vulnerable to maintenance. In particular, it's more sensitive to dirt and moisture, which is why ball bearings usually have dust covers or sealing plates.

The internal balls and cage structure also make it relatively susceptible to external shocks and vibrations. Therefore, they can neither run smoothly nor be noise-free. The inertia of the balls may also reduce the running speed. However, in general, special materials make sliding bearings a better bearing variant. And before the slide bearing original disadvantages (that is, lubrication and maintenance requirements) become the advantages. Ball bearings are still a major technological innovation to maintain their position as the best alternative.

The Development of Plastic Slide Bearing

The development of high-performance engineering plastics created new opportunities in the field of sliding bearings. Sliding bearings can already be produced using polymers, even if the lubrication is insufficient. Under the same degree, plastic bearings have a certain tolerance to humidity and heat.

Advantages of Sliding Bearing

The sliding bearing has a larger contact surface and lower surface pressure. Can use flexible shaft or shaft of other materials, such as aluminum alloy, carbon fiber, etc. Therefore, one of the many advantages of sliding bearings is a further reduction in weight. Since there is no mechanical rolling of hard friction parts and no collision of rolling elements, there will be less noise and vibration caused by the sliding operation.

Using linear sliding bearings, you can splice guide rails. The reason is that the movement of the sliding element is easier to pass through the rail seam than rolling elements. In all ball bearings, an important disadvantage related to the bearing material is the limit on the allowable speed and acceleration.

In contrast, sliding bearings made of engineering plastics have higher sliding speed and acceleration. Therefore, it can greatly improve its cycle time in many applications.