had, one boring holes from one-half inch to one andone-half inches, and the other seven-eighths inch tothree inches. Fig. 28 shows another boring tool that isvery handy, especially to pattern-makers and to otherswho want to bore holes with smooth bottoms. It is calledthe Forstncr bit. it has no… … Fig. 27. Fig. 28. Fig. 29. Fig. 30. in work as it revolves in the lathe. The central spur is 184 WOOD PATTEJRN MAKING not a screw, but simply a triangular point, so that thisbit, like the last one, must be forced to its work; thus itcan be made to do its work rapidly or slowly as the jobmay demand.…
Patternmaking
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