Bearing Life Spec Table
3 types of spec data
A single-page reference for bearing life calculation — the core ISO 281 formulas and correction factors. Includes the L₁₀ basic rating life equations (p = 3 for ball, 10/3 for roller), speed factors fn by RPM, temperature factors ft, and reliability factors a₁ for 90–99.95% reliability classes. With the basic dynamic load rating Cr and equivalent dynamic load P known, life in hours is L_h = (10⁶/60n) × (Cr/P)^p; multiply by a₁·a₂·a₃ corrections to obtain in-service life. Use this for design review, spec decisions, and maintenance-interval planning.