SKF
Bearing Selection Process
The bearing selection process is a systematic engineering workflow that transforms machine requirements into a reliable, cost-effective rolling bearing specification. It begins with a clear definition of performance requirements — loads (magnitude and direction), speeds, desired life, and operating environment. Using this data, the engineer narrows down suitable bearing types and arrangements. Lubrication selection follows, considering operating temperature, speed factor, and contamination risk. Bearing size is calculated using load ratings and life equations, often with SKF’s online tools. Interface fits, internal clearance, and sealing are then finalized. The process concludes with mounting and dismounting planning. This structured approach, documented in SKF’s engineering handbooks, ensures that all critical factors are addressed and provides a traceable rationale for the selected bearing, facilitating design reviews and compliance with quality systems.
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Data-Driven Specifications
Basing decisions on measured or calculated loads prevents under- or over-specification.
Integrated Lubrication Design
Simultaneous bearing and lubricant selection maximizes EHL film thickness and life.
Life Calculation Tools
SKF Bearing Select and SimPro Quick simulate bearing performance before prototyping.
Standardized Workflow
Repeatable process aligns with ISO 9001 and APQP requirements.
Comprehensive Documentation
Design records aid maintenance optimization and root cause analysis.
Risk Mitigation
Early attention to sealing, fits, and thermal expansion prevents field failures.
How to Define Performance Requirements for Bearing Selection
Start by listing all operating conditions: radial and axial loads under start-up, steady-state, and overload scenarios; shaft speed and duration; desired L10mh life. Include environmental data such as ambient temperature, external heating/cooling, and contamination type (dust, water, chemicals). SKF’s load calculation methods help convert machine forces into bearing-equivalent loads, the critical starting point for any selection process.
Why the Bearing Selection Process Matters for OEM Design
Skipping structured selection often results in bearings that are too large (wasting energy and space) or too small (causing early failures). A documented process supports DFMEA activities, reduces warranty risks, and ensures consistent quality across machine generations. SKF’s application engineering support augments in-house design capabilities with thousands of reference cases.