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The backing bearing is a special bearing for multi-roll mills. When used, it is installed on a mandrel in a set form and used as a support roller. The precision required by the bearing itself is very high. The height of the section (T value) from the inner diameter to the outer diameter after eliminating the radial clearance is particularly important. The T value of each set of backing bearings is controlled within 0.005mm, and the radial clearance is controlled within 0.08mm In this way, the machining accuracy of the bearing parts must reach the P4 level, and the requirements for the use of the bearing on the machine are very high.
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