Ball Roller—An Efficiency Solution for Rolling Axis

Industrial department of Schaeffler Group empolders a efficiency conception of bearing. On the base of new-style “ball roller”, this solution has its special advantage: it has very simplified surround structure and can excellent transfer the definition of bearing operation to the module of rolling axis, which is achieved thanks to a preloaded compact bearing support with single-piece bearing rings. This kinematic characteristic of ball roller bearing also can make the products offer high speed, as well as provided low friction and demand-oriented rigidity.

Ball roller offers numerous advantages

The innovation is based on a double-row angular contact thrust ball roller bearing in O-arrangement with novel rolling elements. All areas of the conventional rolling element “ball” that are not under load are removed, which means that 15 percent of the ball diameter is cut off on both sides of the ball. The result is the so-called ball roller, being 30 percent narrower and correspondingly lighter than a true ball. A bearing equipped with ball rollers has the same functionality and accuracy as a ball bearing. Various applications, e.g. in automotive and precision engineering, already benefit from the advantages offered by ball rollers, which include less space requirement, less weight, larger grease reservoir and higher load ratings.

Simpler, Longer Life, More Cost Benefits

In machine tool applications, these characteristics bring the advantages which can rise the efficiency of whole system.

● Simplified surroung structure reduce costs: due to the axial displacement of the bearing rings relative to each other, and it can locate the bearings on the surface simply. Otherwise, because of the rigidity design of bearings, it must not fit the high exact bearing settings along the entive height.

● More easier and faster installation: sharpnel bearing rings can transfer the bearing’s running accuracy to the equipment. Besides, it does not require the safty device of split bearing rings, that can avert the mistake of location.

● Also can rise service life: Huge grease reservior can extend the interval of relubrication, and even in some applications can be maintenance-free operation. This is also supported by sealing gap systems on both sides that reliably retain the lubricant inside the bearing even at high speeds.

Pilot applications as from 2010

Double Row Angular Contact Ball Bearing has proved its functionality in the program of exploitation. Starting with bore diameter size 325mm, the speed strength during continuous operation as well as the bearing behavior under load were tested under realistic operation cycles. Under all condition, the testing result of product’s antetype is very satisfactor. Henceforth, the process will be continued with optimized and near-series prototypes. First pilot applications are scheduled to commence at the beginning of 2010. Potential initial users are still being sought.

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