MAXIMUM STATIC LOAD Co

      When subjected to an excessive load or shock, rolling bearings may incur a
      permanent damage to the raceways, called brinelling. This occurs when the
      elastic limit of the raceway material is exceeded and will permanently
      effect the smooth rotation of the bearing.

      The maximum static load rating of a bearing (Co) is defined as that load
      which will produce a contact stress of 609,000 lbf /in2 (428 kgf/mm2)
      between the rolling element (ball) and the raceway. The values of Co are
      listed in the bearing tables for each individual bearing. Exceeding this
      value will damage the bearing.

      EQUIVALENT DYNAMIC LOAD

      In most cases, the actual load applied to a bearing is a combination of
      fluctuating radial and axial loads which cannot be directly used for
      fatigue life calculations. Instead, the Equivalent Load (P) is used. This
      represents the hypothetical load of constant magnitude, passing through
      the center of the bearing, that would give the actual observed bearing
      life when used in the fatigue life formula. It is an estimate, dependent
      on the initial ball contact angle αo and the static capacity of the
      bearing Co, as well as the actual load applied (F).

            P = Pr + Pawhere:  Pr , Pa are equivalent radial and axial
            equivalent loads, calculated using the nomographs on the next pages.

      EQUIVALENT AXIAL LOAD NOMOGRAPGH (LBS. OR KG)

      EQUIVALENT RADIAL LOAD NOMOGRAPGH (LBS. OR KG)

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