e used just as they come from thedrop hammers with commercial forging tolerances. Itis not necessary to maintain sharp edges, consequentlythe hammer dies can be used for longer runs. Theblanks are designed with a thickness about equal tothat at the pitch line of the finished gear, as the metalis… … Left—Blanks for rolled bevel gear and pinion.Right—Bevel gear and pinion after rolling opera-tion, showing shroud of extruded metal left afterthe rolling is completed. No machining of theteeth is required along the die teeth, the blank-holder allowing a certainspace for free egress of the metal…
Automobiles · Aeronautics
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