Max Bearing Load for a Target L10 Life
The inverse of the bearing-l10-life tile: the largest equivalent dynamic load a bearing can carry and still reach a target rating life, P_max = C x (10^6 / L10_rev)^(1/p) with L10_rev = target_hr x 60 x rpm (p = 3 ball, 10/3 roller). A ball bearing rated C = 5,000 lbf at 1,750 rpm can carry 1,000 lbf for a 1,190 hr L10; because life scales as the cube of the load ratio, doubling the required hours only cuts the allowable load by about 20%. Answers 'how hard can I load this bearing' instead of checking one load. A planning estimate; the mounting, lubrication, and application govern.
Formula and source
p = 3 (ball) or 10/3 (roller); L10_rev = target_hr x 60 x rpm; P_max = C x (10^6 / L10_rev)^(1/p); the inverse of L10 = (C/P)^p x 10^6.
The ISO 281 / ABMA 9 & 11 basic rating life (L10) solved for the maximum equivalent load, by name; the mounting, lubrication, and application govern.
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