Rolling mill owners are under constant pressure to reduce their production costs against the background of a variable global market. A common way to achieve competitive costs is to increase mill productivity. Higher productivity can be obtained by increasing the mill line speed, defined as the linear velocity (m/min) of the strip passing through the 4-high mill stand (Fig. 1). However, higher mill operating speeds cannot be applied directly in existing mills due to the risk of rapid roll wear or bearing damage.
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