What is the difference between roller slide rails and steel ball slide rails?

Comparison of Hepco Motion V-shaped roller guide rails and traditional ball guide rails PHONE?Number: I8O594O38298

The roller guide rails have the following characteristics:

1. Faster linear speed and higher acceleration

The V-shaped roller rolls on the V-shaped surface of the roller guide rail. The linear speed can reach up to 10m/s and the acceleration can reach up to 2G. This is achieved through sophisticated To ensure the production process, Hepco Hepco's British factory has ISO9001 certification and aerospace standard TS157 certification. The precision roller bearings produced can reach P4 level, some accuracy indicators can reach P2 level, and the spindle bearings have With the same accuracy, the surface roughness of precision roller guide rails can reach 0.4um.

2. Low noise

The V-shaped groove of the roller bearing and the V-shaped surface of the roller guide rail have good contour consistency; the V-shaped roller on the V-shaped guide surface of the roller Smooth rolling, line contact can greatly reduce noise during high-speed operation.

The balls in the ball guide slider roll along the raceway, and the collision of the balls during high-speed operation will produce a lot of noise.

3. Suitable for use in harsh environments ranging from dust-free to dusty:

The rolling elements in Hepco's roller bearings do not directly contact the V-shaped surface of the guide rail. In addition, the roller bearing has good sealing performance. The V-shaped groove of the roller bearing is in line contact with the V-shaped surface of the roller guide rail. The V-shaped guide technology continuously performs a "scraping" action to remove dust, debris, chips and other impurities from the V-shaped guide rail. Scrape off the surface to keep the V-shaped guide rail surface clean, which is very suitable for use in harsh environments.

The rolling elements of the ball guide rail are in direct contact with the guide rail surface, and contaminants falling on the guide rail can easily contact the rolling elements; for ball guide rails, dust, chips and other impurities on the guide rail surface It has a catastrophic impact on the normal use and life of the ball guide rail; because in harsh working environments, it is difficult for brushes or scrapers to prevent dust, chips and other small impurities from entering the interior of the slider;

entering the slider Internal impurities will increase the force on the balls, thereby accelerating the wear of the balls. This not only affects the smoothness and accuracy of the ball guide rails, but also greatly shortens the service life of the ball guide rails.

4. Reduce the accuracy requirements of the installation benchmark: A V-shaped roller in the Hepco V-shaped guide roller guide system is equivalent to a slide block of the ball guide rail, a V-shaped roller and a roller guide rail The V-shaped surface contact is similar to a single-point contact, which greatly reduces the accuracy requirements for the installation reference surface, saving time and effort in assembly.

For ball guide rails, due to the need to ensure uniform contact between multiple balls in the slider and the raceway, during assembly, the ball guide rails have very strict requirements on the accuracy of the installation reference surface. In order to ensure straightness , flatness and parallelism need to be checked, leveled and polished, etc., which is time-consuming and labor-intensive; if it is used in long-stroke applications, due to the influence of external factors, it is almost impossible to ensure the required installation datum accuracy.

5. Low maintenance cost

When repairing and maintaining Hepco V-shaped roller guide rails, the worn guide rails or rollers can be replaced individually. There is no need to replace them all. The adjustment of the eccentric roller makes it easy to adjust and obtain the required preload force, and the maintenance and replacement cost is lower.

After the balls or guide rails of the ball guide rail slider are worn, once they need to be replaced, in order to ensure the required clearance or preload, the entire set of guide rails and slide blocks must be replaced, because the clearance or preload value of the ball guide rail system It needs to be set by the manufacturer before leaving the factory; if a long stroke is obtained by splicing, the alignment of the new guide rail and the old guide rail will be difficult and time-consuming, because the straightness, flatness and parallelism of the entire guide rail system need to be ensured .

6. The pre-tightening force is adjustable

When the roller guide rail is assembled, the concentric roller and the eccentric roller are used together, and the pre-tightening force between the roller and the guide rail can be adjusted at any time to ensure Smooth operation.

The clearance or preload of the ball guide rail needs to be set before leaving the factory and cannot be adjusted during use.

7. Longer service life

Hepco's roller guide rails have a much longer life than roller bearings. In many cases, only the rollers need to be replaced, and then The required preload force can be obtained by adjusting the eccentricity of the eccentric roller.

After the ball guide rails, whether the balls or the guide rails, are worn to a certain extent, the entire set needs to be replaced in order to ensure the preload or clearance required by the application.

Generally speaking, the track is the component with the longest lifespan in the entire linear motion system; if you are using a ball guide rail, you have to replace the track when replacing the slider; for roller guide rails, you can only replace the rollers. of.

Within the life span of the entire equipment, the life of the slider and the roller is the same; if a ball guide rail is used, the track must be replaced when the slider is replaced; for the roller guide rail in good working condition, You can just replace the rollers.