Schaeffler has introduced a new line of casing bearings that feature three slightly larger casing rollers placed between standard solid cylindrical rollers. This innovative design helps prevent the misalignment of cylindrical roller bearings under low-load conditions, ensuring better performance and durability in challenging applications.
The newly developed FAG casing bearings from Schaeffler are designed for use in tough environments such as hot-rolled steel mills. During the steel processing stage, these bearings experience extremely high loads, but they often become nearly unloaded after the transfer. In such scenarios, bearing offset can occur, leading to potential damage. The new design addresses this issue effectively.
According to Rainer Eidloth from Schaeffler Group: “Before any load is applied, the size difference between the casing roller and the solid roller is minimal. However, when radial load is applied, the casing roller deforms elastically and eventually reaches the same size as a solid roller. This ensures even load distribution across all rolling elements.â€
The company’s head emphasized that the new product is not only simple in design but also easy to install. Moreover, due to its standard dimensions, it can be used interchangeably with conventional cylindrical roller bearings. Eidloth added that the second generation of this design is currently undergoing testing to adapt to various operating conditions.
At the recent Hannover Fair, Schaeffler showcased a sample of the new bearing, which is smaller than other models in their range. These bearings are suitable for demanding applications like wind turbines and paper mills. Additionally, Schaeffler has developed another bearing designed for harsh environments, made from a special material called 'Cronitect.' This material combines corrosion-resistant properties with martensitic hardened steel. The name 'Cronitect' stands for chromium, nitrogen, and corrosion resistance.
Martensitic steels containing chromium and nitrogen have been known for some time, but according to Schaeffler’s representatives, the unique chemical composition and advanced surface treatment make this product exceptionally strong and resistant to corrosion.
Cronitect products have been tested on salt spray testers following DIN 50021-SS standards for over 600 hours without showing any signs of corrosion. The company claims that bearings made from this material can safely come into contact with water, amino acids, and cleaning agents. The material is available in both sealed and unsealed versions, offering flexibility for different industrial needs.
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