A Global Steel Company was having problems with a cold form saw used to cut steel tube. The saw moved axially using a ball screw and was being supported by a simple thrust ball bearing which was failing every 6 weeks. Fialures caused unplanned maintenance and downtime. Analysis of the saw design showed that the ball screw arrangement was subjected to high axial impact loads and that the original design was not robust enough to withstand these loads. An on-site bearing investigation was conducted and key dimensions measured. This allowed NSK to propose the WBK Ball Screw support unit which offers a much higher thrust load capacity.
|Before||Cost p.a.||NSK Solution||Cost p.a.|
|4 hours downtime @ $2,144/h x 9 unexpected breakdowns per year||$77,184||No downtime in over 12 months||$0|