Ball rail systems: twice the service life and high travel accuracy

There is a longer life

The patented entry zone of the new BSHP ball runner blocks from Rexroth improves the travel accuracy of ball rail systems and the machining quality of work pieces as a result.

By integrating its patented run-in zone and more load-bearing balls in the load zone, Rexroth has doubled the nominal service life of its ball rail systems while increasing travel accuracy. (Photo: Bosch Rexroth)

At the same time, greatly improved load capacities increase service life expectancies by a considerable amount.

The new runner blocks are available in all sizes, versions and accuracy classes. They also fit on already installed profiled rails of the same sizes without any restrictions. The axis travels toward the blank with a high level of dynamic capability. The tool machines the work piece with high force, whereby the new BSHP runner blocks distinguish themselves from the previous generations in this context as the ball runner block encounters only minimal pulsation, even when placed under a load, with no change in the high precision of the travel movement executed. The machining quality and accuracy of cutting machine tools, measuring machines, glass machining equipment and other tooling increase as a result.

Rexroth has also bettered the dynamic load capacities by approximately 26 percent across all sizes and variants, with static load capacities improving by as much as 50 percent. Dynamic load capacities form the basis for service life calculations. The higher output values lead to a service life that is up to 200 percent longer. The higher load capacities also promote the trend toward energy-efficient lightweight construction for new machine concepts as the new runner blocks can allow machine manufacturers to use a smaller size than before without sacrificing performance. This, in turn, saves weight and installation space.

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The advancements in travel accuracy and the reduced fluctuation in friction force were realized by implementing Rexroth‘s patented entry zone in the ball runner block. The steel inserts elastically adapt to the operating load so that the balls can enter the entry zone smoothly, without any pulse-like stresses. The entry zone individually adapts to the current operating load of the ball runner block.

The new BSHP ball rail runner blocks also align with Rexroth‘s interchangeable design, whereby users can combine the runner block and profiled rails of identical sizes as required. This reduces logistics, assembly, and servicing outlay throughout the entire lifecycle. The BSHP runner blocks in sizes 15 to 65 also fit on already installed profiled rails without any restrictions.   pb

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