NSK has resolved recurring spindle bearing failures in four CNC machining centers at the factory of a leading automotive industry supplier. Given the fortnightly failure rate of the main shaft bearings, this solution now saves €32,880 per year. In order to investigate the cause of the failure, NSK needs to investigate the entire application and maintenance process. NSK experts observed the installation method of the maintenance department and found that the main problem came from mishandling of super precision angular contact ball bearings. NSK Super Precision Angular Contact Ball Bearings feature long life, high precision and low noise for high-speed machine tool spindles. Proper bearing installation is critical for optimal operation and ongoing maintenance of industrial machinery. Proper training and use of the proper tools are very important. With this in mind, NSK conducted comprehensive training for the company's maintenance personnel, which included mounting and dismounting techniques as well as advice on replenishing bearing grease. After the training, no other problems occurred, and the bearing life was extended from two weeks to six months, which again reduced costs significantly. Consider bearing failures every two weeks (four machines), and the cost of replacement and downtime. After investigation and research by NSK and improvements, only two bearing replacements are required per year, equivalent to an annual saving of 32,880 Euros. Super precision angular contact ball bearings have a longer life due to the use of NSK patented ultra-high purity and advanced materials. Additionally, the low-noise characteristics make them ideal for the quiet-running high-speed spindles found on many modern machine tools. A variety of cages and seals are available.
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