Cylindrical Roller Bearings Handle High Loads

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Aug 03,2007

Cylindrical Roller Bearings Handle High Loads The curvature of the INA X-life roller faces optimises the roller face/rib contact conditions. Up to now, cylindrical roller bearings have had only a limited capacity for axial loads. But engineers from Schaeffler have optimised the contact geometry of the new INA X-life cylindrical roller bearings with the help of new calculation methods and modified manufacturing processes, resulting in a range of bearings that boast significantly increased axial load carrying capacities. In the past, the axial/radial load ratio in cylindrical roller bearings could not exceed a value of 0.4, which meant that the axial load could not exceed 40% of the radial load.For the new X-life cylindrical roller bearings, this value has been increased to 60%, due to a special curvature of the roller faces, which optimises the roller face/rib contact conditions. This improved contact geometry permits the formation of a lubricant film of significantly higher load carrying capacity. Now the rollers slide on the lubricant film during axial loading and the risk of 'mixed friction' is reduced considerably.This prevents wear at the ribs and roller faces.As a result of the improved contact conditions, the frictional moment under axial load decreases by up to 50%. This means that the bearings operate at a lower temperature, so that the lubricant also remains cooler, resulting in the formation of a lubricant film of significantly higher load capacity.In this way, the roller faces and bearing rib are optimally separated.For customers, this means an increased service life for the bearings. In addition, new design opportunities are possible, such as downsizing.Also, the reduced friction saves energy - an important factor in protecting the environment.

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