The Bengal Nagpur Railway class NM was a class of ten 4-8-0+0-8-4 Garratt locomotives manufactured by Beyer, Peacock & Company in England. This was modified N class Garratt with a 17-ton axle load. It had thermic siphons and arch tubes for better performance. It worked on the Bilaspur-Katni line and Anuppur-Chirmiri branch line for hauling coal. They were withdrawn by the late 1960s, possibly due to their poppet valves. Technical specifications Boiler diameter Heating surface of firebox Maximum train load on level track
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