A paper mill in the US was experiencing bearing failures on its nip roll after just 12 months of service, leading to continuous paper roll failures. In total, downtime and maintenance costs were amounting to 600,000€ per annum.

Why is the production of liner board being continuously interrupted?

With downtime at the busy paper mill costed at 20,000€ per hour, it was imperative to find a comprehensive solution.

Problem / Challenge

Survey and Analysis

An NSK industry specialist investigated the application.

Machine and bearing failure analysis identified that the existing OE bearing design was not appropriate for the application. The design issues were leading directly to the failures.

Extended and more reliable paper machine operation the following year

Modifications to clearance, interference fits and adjustments to the use of the turnbuckle were all implemented. NSK Spherical Bearings with the recommended changes were installed, eliminating subsequent failures and costs.

NSK Solutions, results and benefits for the customer
Spherical Roller Bearing CA Series

Spherical Roller Bearing CA Series

  • Large size Spherical Roller Bearing with brass cage
  • Special running accuracy
  • Specific shaft and housing fit for running clearance

>> Spherical Roller Bearings with CAM cage

Cost Savings – Downtime and maintenance costs


€ 600,000

NSK Solution

€ 0

Cost savings

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