Bearing failure prevention starts with bearing installation

The installation of bearings requires correct knowledge and skills. Experience shows that during bearing installation, installers often make mistakes that greatly shorten the service life of bearings, including failure to keep bearings clean and failure to adhere to bearing rings and shafts. According to bearing manufacturer NSK, these mistakes can be easily avoided.


NSK provides training specifically on the correct installation and disassembly of bearings. The training can be conducted on the user's website or in cooperation with sales partners. In addition to providing training, as part of its AIP+ (Added Value Plan) service package, NSK also Tools are provided to install bearings in a professional manner and are used to apply the correct force required to press the bearing rings into place.


In the case of cold mounting, it is important to ensure that mounting forces are never transmitted through the rolling elements of the bearing, otherwise damage may occur, not only to the rolling elements but also to the raceways.


Even with the use of hydraulic tools and induction heaters for hot installation, bearings can still be damaged if the tools selected are not suitable for the application or used incorrectly, possibly resulting in dented raceways, deformed seals, damage to adjacent components, and even cracks in the bearing rings.


Another service provided by NSK is on-site failure analysis to check for bearing damage. For example, a large automobile manufacturer had two exhaust ventilation equipments where the bearing temperatures were always high and the resulting bearings were damaged. Failures occur approximately every six months, and NSK is invited to find a solution.


A comprehensive application review conducted by NSK expert engineers revealed that the temperature increase was caused by excessive preload applied to the bearings and high external temperatures in summer. Another possible reason was that limited space made it difficult to properly install the bearings on the ventilated shaft. NSK therefore recommended changes to the company's spherical roller bearings, which not only have the highest load ratings in their class but are also temperature stable up to 200°C. The bearings also compensate for misalignment, allowing for certain installation Inaccurate.


As the bearings are replaced, NSK recommends that relevant maintenance personnel be trained on professional bearing installation and disassembly at the customer site. Under the supervision of the NSK engineering team, after the new bearings are correctly installed and adjusted, the temperature rise is reduced. So far, it has exceeded No bearing failure reported for 12 months, saving €15,000 per year in downtime and bearing installation and removal costs.