Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools (1916)
Griffith, Ira Samuel, 1874-1924 · Peoria, Ill., Manual Arts Press · leaf 57
essary. Again, where largeholes are to be boredin hard wood it isdifficult to accom- ga^ ^^=€00000X9 plish the result with ^ o. ^t .... Fig. 84. Nut Auger. an extension bit, be-cause of the small leverage and the fact that only onehand is available for turning the crank. Fig. 84 is anillustration… … Jaw 5 Fig. 85. Beveled Gear Corner BraceAND Angular Boring Attachment. 63. Angular BoringAttachment. — Specialbraces called cornerbraces are made forthe boring of holes c, alons^side walls and in Ball and ^ 6ocKtT Joint corners. Fig. 85, shows an at-tachment for an ordi-nary brace to be nsedfor…
Woodwork (Manual training)
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