e of 179 deg. will now be far more con- not be tested by an angle gage, but when applied it may | handy and easily understood by a mechanic, of accu- spicuous than it was in the case of the round-nose tool. be set in the slide rest correctly by its shank, instead The other edge, or aS many as… … tested with a protractor so as to simple and handy, but accu- be exactly 60 deg., the form of rate guide. the thread as seen in an axial It is a simple device, consist- section would be just over 60 deg. In most ‘cases the exactly as described would suffer from the defect that ing, as will he seen…
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