Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 131
of an inch) from the upper to the lower. In others, and perhaps in the generality of, the middle of the three is the largest. Some metallurgists, on the contrary, object entirely tothis difference of diameter, as causing increased friction in the machinery, and straining the iron. Thisobjection is… … IRON. 125 bar after the resistance of the lower roll has ceased, and will, of course, tend to force it down upon theapron. Bnt this tendency to curl is best corrected by having guards to each groove—i. e., weiwronght-iron, which catch the bar as it comes out. The diameter otthe cylinders, and their…
Mechanical engineering
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