A worldwide manufacturer of automotive components was having significant unplanned stoppages due to the failure of the Ball Screws in the Machining Center. This had a major effect on the manufacturing output resulting increased costs and reduced machine reliability. The average life of the Ball Screws was about 6 months. NSK analysed three of the failed Ball Screws to determinate the main reason of the failure. NSK's Technical Department developed a special design to improve all the technical characteristics, especially the high-performance sealing design. Two Ball Screws were installed in the most critical points in the plant. This was successful and led to a cost saving and reduced machine downtime and a massive increase in lifetime.
Before | Cost p.a. | NSK Solution | Cost p.a. | |
---|---|---|---|---|
Costs for Ball Screws x 2 machines | € 8.400 | Costs for Ball Screws x 2 machines | € 4.000 | |
Production costs: 6 hours/stop x 12 stops x 360 pieces/hour x 10€/piece | € 259.200 | No failures in 36 months | € 0 | |
4 hours for each Ball Screw x 50€/hour x 14 changes | € 2.800 | 4 hours for each Ball Screw x 50€/hour x 2 changes | € 400 | |
Total Costs | € 270 400 | € 4 400 |
Reference:SS-E-7028