The amendment of the bearing limit speed

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Load conditions C / P <13 (equivalent dynamic load P more than the basic rated dynamic load C, 8%), or under synthetic load in the axial load of more than 25% of the radial load, use the following formu la for the limit speed correction.
na = f1 * f2 * n
na: revised the limits of speed, rpm
f1: the correction factor to the load conditions angular contact ball bearings
f2: combined load correction factor
n: limit speed under normal load conditions, rpm (with reference to the bearing size table) double row angular bearing
C: basic rated dynamic load, N {kgf}
P: equivalent dynamic load, N {kgf}
Fr: radial load, N {kgf}
Fa: axial load, N {kgf}

Limit speed with a ring of ball bearings

With contact seals (RS type) ball bearing speed limit by the limit of the linear velocity of ring contact surface to allow line speed depends on the rubber material of the ring.ball screw bearing