Jun/Jul 2008

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Trick-Turning In Wood And Metal

The following article is reprinted from Work, an English hobby magazine. It originally appeared in the December 4, 1920 issue, which C. H. Wendel furnished from his collection.

A LATHE, whilst primarily intended to cut articles to a circular cross section, may be adapted to turn any geometrical cross-sectional shape, whether regular or irregular. Any turner who has manipulated a lathe set up for relieving or placing the clearance angles on a hob (the tool used in the milling machine for cutting gears) will have noticed the peculiar action of the slide-rest in cutting in to a predetermined amount, and then suddenly jumping back to clear the cutting lip of the next tooth. This action, of course, is obtained by the use of cams and return springs, the setting out of which is a specialised branch of draughtsmanship.

It is not intended to deal here with the difficult and strictly mechanic...

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