In a quarry in the United Arab Emirates, the bearings in a jaw crusher were failing once a year. This resulted in replacement and massive loss of production due to downtime. The competitor's bearings were failing due to incorrect installation, lack of lubrication and poor performance at high temperatures. NSK and Rolman World investigated the failures, which led to a modification of the shaft and housing. Maintenance staff were trained to install the new NSK bearings (heat stabilized up to 200°C) with proper lubrication. The result was excellent, the bearing has been running for 5 years without any sign of degradation, resulting in savings of almost 2 million Euros per year.
Key facts:
- A crusher in the United Arab Emirates was experiencing premature failures in the main jaw crusher bearings.
- The bearings were failing every year, resulting in replacement, downtime and massive loss of production.
- The competitor's spherical bearings were failing due to a number of factors, including lack of proper lubrication and incorrect installation procedures.
- NSK and Rolman World investigated and found that the installation process for the large bearings was inadequate and lubrication was not being applied properly.
- A lubrication study and optimization with shaft & housing modifications, training & supervision on NSK bearing installation was provided along with a heat stabilized bearing up to 200°C.
- The result was outstanding as the bearing has been running for 5 years with no signs of degradation, resulting in savings of almost 2 million Euros on an annual basis.
Value Proposals
- NSK analysed the application suggested heat stabilised bearings to save downtime and improve output
- NSK Spherical roller bearing with very high load capacity and long life replaced the existing product
- The bearings were fitted and performed for 5 years without any intervention
- Contaminant ingress reduced and lubrication reduced, giving greater savings to the customer
Product Features
- Optimum raceway design & surface finishing
- Up to twice the operating life
- Highest load rating SRB's
- Temperature stability: up to 200° C
- Up to 20% higher limiting speed
- Lower maintenance cost and improved productivity
