High - speed bearing
Rolling bearings with Dm• N value exceeding 1.0×106mm• R /min are generally called high-speed bearings. Where Dm is the average diameter of the rolling body, and n is the rotation speed of the inner ring. At present, in practical application, the Dm• N value of high-speed bearing has reached 3.0×106mm• R /min. At the beginning of this century, the Dm• N value of high-speed bearing can reach 3.5×106mm• R /min.
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