olling speed limit generally refers to the following conditions to achieve maximum speed:

(1) bearing tolerance is 0;

(2) bearing clearance for the 0 group;

(3) bearing load of the rated load of 10% (or 0.1C);

(4) normal lubrication and cooling conditions;

(5) only to the heart to bear radial load bearings, thrust bearings only carry axial load;

(6) the outer ring temperature does not exceed 100 ℃.