SKF
Principles of Rolling Bearing Selection
A methodical approach to rolling bearing selection ensures that the final design delivers reliability, longevity, and cost efficiency. SKF’s principles of rolling bearing selection guide engineers through the critical decision points: from defining performance requirements and operating conditions, through bearing type and arrangement, lubrication, size calculation, and interface design, to sealing, mounting, and dismounting considerations. This framework is essential for both new equipment design and replacement or upgrade scenarios. By systematically addressing each factor, potential failure modes such as inadequate lubrication, excessive heat generation, or fitting stress are mitigated early. The process integrates SKF’s extensive bearing knowledge and calculation tools, enabling data-driven decisions. Following these principles helps procurement teams specify bearings that match the application’s true demands — avoiding over-engineering while ensuring sufficient safety margins.
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Trusted by Industry Leaders
Structured Decision Framework
A step-by-step process minimizes oversight and ensures all critical parameters are evaluated.
Life Cycle Cost Optimization
Correct selection reduces energy losses, maintenance interventions, and unplanned downtime.
Application-Specific Calculations
SKF tools compute L10 life, friction torque, thermal speeds, and lubrication intervals tailored to actual loads.
Risk Reduction
Addresses sealing, mounting, and lubrication upfront to prevent common bearing failure causes.
Design Documentation
Produces a clear record of selection assumptions, aiding future troubleshooting and design reviews.
Global Standard Compliance
Aligns with ISO 281 and other international bearing standards for guaranteed reliability.
The Bearing Selection Process: A Step-by-Step Guide
Start by listing all performance requirements: load spectrum, speed profile, desired service life, and environmental conditions (temperature, moisture, contaminants). Then select a bearing type and arrangement that supports the load directions and stiffness needs. Choose a lubrication method — grease with relubrication or oil — and calculate minimum viscosity ratio. Sizing uses the SKF rating life equations, factoring in reliability and contamination. Define shaft and housing fits, internal clearance, and sealing solutions. Finally, detail mounting and dismounting procedures. This systematic flow ensures a robust bearing arrangement.
How Proper Bearing Selection Prevents Premature Failures
Incorrect bearing selection leads to issues like smearing from excessive clearance, false brinelling due to vibrations, or thermal seizure. Following SKF’s principles helps engineers avoid mismatched load ratings, inadequate lubrication films, and improper interference fits. The result is predictable performance and extended bearing life, directly impacting production KPIs.