Rolling bearings — Linear motion rolling bearings — Part 1: Dynamic load ratings and rating life ISO 14728-1

Rolling bearings — Linear motion
rolling bearings —
Part 1:
Dynamic load ratings and rating life
ISO
14728-1

It is often impractical to establish the suitability of a linear motion rolling bearing selected for a specific
application by testing. The following procedures have proved to be an appropriate and convenient
substitute for testing:
— life calculation with dynamic load (ISO 14728-1);
— static load safety factor calculation with static load (ISO 14728-2).
The life of a linear motion bearing is given by the distance which one of the raceways moves, in relation
to the other raceway, before the first evidence of fatigue develops in the material of one of the raceways or one of the rolling elements.
The formula for calculating the basic dynamic load ratings are derived from the theory of Lundberg
and Palmgren

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