Rolling contact bearings are amongst the most important machine parts, because they can transfer forces and movements. They are used in almost all drive engineering areas. Their designs are always dependent on the use. To ensure a calm and persistent use of the rolling contact bearings, greases and oils must be applied. The lubricants are mixed with additives, which give the lubricants additional properties.
When using additives, the properties of the lubricant can be changes so significantly, that the usage of the rolling contact bearings become unfavourable and the long-term handling is endangered. The rolling contact bearings are therefore tested at a test station and are tested with new oils. On the one hand, acoustic measurements and on the other hand abrasion tests are performed.
DIN norms, like the DIN ISO 15242-1 up to DIN ISO 15242-3, dictate testing methods that determine the maximal noise emission in the bearings. Din norms, like the DIN 51819 are used to determine the wear rate when using different lubricants on cylinder roller thrust bearings. Different test rigs are used in these DIN norms.