Success Story
Industry: Pulp and Paper
Application: Paper Roll
Cost Savings: € 600 000
Introduction
A paper mill in the US was facing frequent bearing failures on a Nip Roll. The bearing failed after just 1 year of service, which created a high cost of lost production together with significant maintenance issues.
NSK was consulted to investigate and found out that the bearing design and set-up were not appropriate. After the installation of NSK's recommended Spherical Roller bearing, no more failures occured.
- Paper Rolls
- Spherical Roller Bearings - CAM Cage
Key Facts
- Nip roll
- Frequent paper roll issues due to bearing failures
- NSK solution: Sphercial Roller bearing with improved clearance and interference fit together with set-up recommendations
- Significant cost saving realised
Value Proposals
- NSK experts performed an Application Review revealing an inappropriate bearing design
- NSK proposed a replacement with a Spherical Roller bearing utilising improved internal clearance and recommendations on shaft and housing fits to achieve this
- After the installation of the new bearing and applying the changes to the application, no failures occured
- Significant cost saving could be realised as machine downtime and maintenance have been eliminated
Product Features
- Special dimension large size Spherical Roller Bearing
- High load capacity, super durability and wear resistance
- High surface finish for high speed applications
- Brass cage with large rollers for greater load capacity
Cost Saving Breakdown
| Before | Cost p.a. | NSK Solution | Cost p.a. | |
|---|---|---|---|---|
| Costs of lost production: 12 hrs downtime per failure occuring 2-3 times per year @ cost of 20.000 € per hr | € 600 000 | Costs of lost production: No failures occured | € 0 | |
| Total Costs | € 600 000 | € 0 | ||
Reference:SS-E-0022
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