Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 506
as to increase the length of bearing for the keys which secure thecentre to the shaft. In the manufacture of this centre the heads of the arms would first be forged, thenplaned on the edges and fitted together on the pkte. The holes would then be bored for the rivets,temporary bolts fitted into…
Mechanical engineering
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