Fry, Horace Pugh. [from old catalog] · Philadelphia · leaf 26
NISH MARKS. Finish marks indicate that the surfacesmarked must be machined to the exact dimension given, not necessarily polished. They are made with a writing pen (seeFig. 21) and should read from the bottom of the drawing only.(See Fig. 17.) The casting or forging is made full, where indicatedby… … %^^=^ W ,1^ ^^ ^M^ Fig. 21. 24 FINISHED SURFACES. The mechanical operations thatare required to finish a surface are Boring, Broaching, Chipping,DrilHng, FiHng, IMilHng, Planing, Reaming, Scraping, Shapingand Turning. The operation may be specified on the drawing for any givensurface as a guide to…
Mechanical drawing
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