Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1921)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 80
an allowance as ye i°ch, butas a general rule sufiicient metal should beput upon the casting toallow the cutting tool of the finishing machine to cut well belowthe surface so that it shall not become dulled by the sand and thehard scale on the outside. Example of Allowance. A pattern for the plain…
Patternmaking
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