What Is Static Load Rating?
The static load rating (C0), defined by ISO 76, is the radial load that causes a total permanent deformation of rolling element and raceway of 0.0001 times the rolling element diameter at the most heavily loaded contact. It is the limit for non-rotating or very slowly rotating bearings.
Static Safety Factor
s0 = C0 / P0, where P0 is the equivalent static load. Minimum s0 values: 1.0 for normal operation, 1.5 for moderate shock, 2.0+ for heavy shock. See the Bearing Selection Guide.
Frequently Asked Questions
When is static load rating important?
When the bearing is stationary or oscillating under load, during slow rotation (< 10 RPM), or during shock/impact loading. The static safety factor s0 = C0/P0 should be >= 1.0 for normal applications and >= 2.0 for shock loads or high reliability requirements.
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