Barrows, F. W. (Frank Wilson), b. 1853 · New York, N.W. Henley Pub. Co. · leaf 253
MAKING. the outside diameter y greater than largest diameter ofnut, as is. indicated by the dimension F-f^. The thick-ness of this ring must be equal to amount of chamfer onnut, I. When these two pieces are placed together, asshown in Fig. 118, the chamfered ring fits over the nutand leaves pockets… … Fig. 118. through flats, or shortest diameter of nut. The pockets,shown at their greatest depth, the thickness of ring 2, areseen at M. For the mating part of this mould, the pattern 3, Fig.120, is required. This leaves a cavity in the mould whichfits over and around the six little projections of…
Patternmaking
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