A British producer of plastic bottles experienced failures of linear guides on extrusion blow molding machines. NSK examined some failed guides concluding that the failures were due to damaged end caps, caused by a combination of short stroke length, repeated start stop operation and increased friction force start up. NSK recommended the trial of NSK roller guides which have optimised internal design to reduce start up torque, resulting in less force on the end caps. The new design was fitted to one machine with no failures reported for over a year. This has eliminated production down time giving a significant saving on maintenance and lost production costs.
|Before||Cost p.a.||NSK Solution||Cost p.a.|
|Bearing Costs||€ 7 400||Bearing Costs||€ 5 781|
|Engineering Costs||€ 4 047||Engineering Costs||€ 1 619|
|Costs of lost production||€ 55 502||Costs of lost production||€ 0|
|Total Costs||€ 66 949||€ 7 400|