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.

Successfully reconditioned bearings can be returned to service, or into critical-spare inventory, thereby:

Extending the life of the bearing
Reducing replacement costs
Eliminating long lead times
Optimizing inventory utilization

Reconditioning Services

From the outset, NSK performs an exhaustive damage analysis to evaluate a bearing’s potential for successful reconditioning and to identify root causes of damage in order to assist our customers with implementing corrective or preventative maintenance measures. For bearings suitable for reconditioning, NSK’s range of services include:

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

Product Range

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

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

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

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

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.