STRONGEST ROLLING MILL ENGINE.
What is claimed to be the most powerful rolling mill engine m the world is now m course of erection m a British steel works. It is intended to drive a train of 32-inch finishing rolls for large sections of steel. Some idea of the enormous size of the engine may be gained from the fact that the face of a man standing on the ground just comes to a level with the crank shaft — the engine being a vertical one. The maximum horse-power developed is 25,000 at a speed of 140 revolutions per minute. There are three cylinders, each 45 inches m diameter and with a stroke of 52 inches. Joists up to 24 inches deep and 12 inches wide will be rolled m this mill. The 1 makers have given a guarantee that this huge engine will be capable of reversing four times m one minute, and they are confident that the engine will do better than the guarantee. This rapidity of reversal, which is of great value m increasing output, is secured by a most ingenious system of valve gears. The .engine is carried on a massive concrete foundation with an iron casting two feet deep — weighing over 100 tons — embedded m it. Small auxiliary engines are used to operate the reversing gear and also the stop valves.
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Bibliographic details
Ashburton Guardian, Volume XLI, Issue 9543, 23 June 1921, Page 5
Word Count
225STRONGEST ROLLING MILL ENGINE. Ashburton Guardian, Volume XLI, Issue 9543, 23 June 1921, Page 5
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