Cast-iron may be finished true and smoothly by a tool having a much broader cutting and scraping surface than is applicable to any other metal; and we are therefore enabled to apply to it, for finishing purposes, the tool above illustrated, setting it so that its square nose is placed quite parallel with the work, and feeding it with a feed almost as coarse as the width of the square nose, say 8 revolutions of the lathe per in. of tool travel on small work, and 3 revolutions per ditto for large work. The tool is held with the cutting edge as close to the tool-post as can possibly be convenient, and the cutting speed is about 25 to 30 feet per minute on small work, and 18 feet on large work, the tool being hardened right out in all cases.

Finishing-Tool For Cast-Iron