Shop practice for home mechanics, use of tools, shop processes, construction of small machines. Contains a chapter also on theoretical mechanics and on miscellaneous information relative to shop work (1920)
Yates, Raymond F. (Raymond Francis), 1895- · New York, N. W. Henley Pub. Co. · leaf 111
ening a drill it will be necessary to keep it cool,otherwise its temper will be effected and the cutting edgewill become soft. To prevent this, the point of the drillshould be dipped repeatedly in a convenient receptacleof cold water. For very small drills, a wheel with a veryfine grit can be used… … Fig. 131—A complete set of the number drills in a rack run from No. 1 to 80. They are called the wire gaugedrills, and the smallest, which is No. 80, measures about.0135 in. in diameter. The No. 1 mre gauge drill meas-ures 15/64ths of an inch in diameter. The wire gaugedrills will suffice for all…
Machine-shop practice · Handicraft
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
