Technical Support


Greater Value
from Critical Assets

NSK provides our customers with the best possible opportunity to maximize bearing life cycles and minimize downtime with sustainable solutions. In continuous casting and rolling mills, the severity of applications can lead to the onset of damage resulting from contamination or metal-to-metal contact that prevents bearings from achieving their calculated life. In many of these instances, the fatigue of the bearing can be foreseen – if not prevented – and the effective service life of the bearing can be extended through a service program to recondition bearings to like-new specifications.


arrow-right-red Extract maximum service life and value from high cost bearing assets
arrow-right-red Realize savings compared to the cost of buying a new replacement bearing
arrow-right-red Overcome lead times traditionally associated with large-size bearing replenishment
arrow-right-red Optimize inventory utilization and investment
arrow-right-red Reduce carbon footprint of new bearing production
reconditioning-support-b-brochure program-brochure-download-icon-text


Bearings used in guide rolls of continuous casting machines operate under extremely severe conditions including heavy loads at ultra-low speeds as well as debris and water contamination. Roll life can usually be measured in months.

But if pulled from use on time, as many 60% of the bearings per segment can be reconditioned and returned to use. For as many as 2 to 3 additional campaigns.

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Reconditioning services can range from polishing and minor repairs to regrinding raceways and replacing components. Not all bearings can be restored and returned to use. Operating conditions may be too severe, damage may be too profound.

From the outset, NSK performs a rigorous analysis to evaluate a bearing’s potential for successful reconditioning to like-new specifications. Additionally, we work with our customers to identify root causes of damage in order to create and implement corrective or preventative maintenance measures.

Our range of reconditioning services include:

arrow-right-red Pressure cleaning
arrow-right-red Inspection, with damage analysis report
arrow-right-red Verification of raceway, bore, inner / outer rings, cup, cone, inner, outer and roller angles
arrow-right-red Provision of new components (rolling elements, pins and cage rings) as required
arrow-right-red Regrinding raceways
arrow-right-red Polishing, vibratory finishing
arrow-right-red Verifying and resetting clearances measured
arrow-right-red Preserving, lubricating, packaging for long-term storage

For all bearings restored at NSK’s Reconditioning Center, our customers can expect the same adherence to process and quality assurance measures that is applied to the manufacture of original NSK bearings to ensure successful operation.

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Product Range

Candidacy for reconditioning is typically viable for a wide range of large-size bearings including:

arrow-right-red Spherical roller bearings
arrow-right-red Tapered roller bearings – single and multi-row
arrow-right-red Cylindrical roller bearings – single and multi-row
arrow-right-red Deep groove ball bearings

For steel mill applications in particular, NSK reconditioning services are widely employed for:

arrow-right-red Caster bearings – spherical and cylindrical roller bearings
arrow-right-red Work roll bearings – multi-row tapered roller bearings
arrow-right-red Back-up roll bearings – multi-row cylindrical and tapered roller bearings
arrow-right-red Slewing ring bearings

NSK owns and operates our Reconditioning Service Center in Alliance, Ohio, providing a wide array of reconditioning and bearing modification services.

For more information, contact NSK.

NSK Web Tools and Apps


Bearing Selection

NSK Bearing Catalog

Our interactive catalog helps you to select the correct bearings that best meet the dimension and operating performance requirements of your application and equipment.

NSK Bearing Calculation Tools

Calculate bearing life, recommended fits and clearances, frequencies, lubrication viscosities and relubrication intervals, frictional moment and speeds with NSK NAVI-FOCUS.

NSK Bearing CAD Models

Select your bearing type, validate suitability of dimensional and performance criteria, and download the CAD model to incorporate into your machine and equipment design.

Bearing Performance

NSK Bearing Doctor

Engage and interact to diagnose bearing damage and possible causes while discovering handling and maintenance practices to avoid bearing failure and unplanned downtime.

AIP Cost-Savings Calculator

Quantifiable improvement is derived from reduced bearing usage, maintenance costs and lost production. Calculate the total attainable cost savings from an NSK recommended solution.

AIP Cost-Benefit Calculator

Improvement may require short-term investment to achieve long-term efficiency gains. Calculate the break-even point where an NSK solution begins to yield cost benefits.