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 124
se, the edges of the counter-sink ])ecome dull,but it is an easy matter to restore their original cuttingefficiency by rubbing a small abrasive stone over theircutting edge. Counter-sinks should be run at a speed in Drilling and Reaming 123 tlie neighborhood of 300 R.P.M. Avhen being used andtoo… … Fig. 149—How a filister head screw sets in a hole finished with abottoming drill shown in Fig. 152. The tool used is termed a drift andit is cut in the end of a round piece of stock as shown.It should have slightly tapering sides, starting from theend and tapering back to the shoulder. Such a drift…
Machine-shop practice · Handicraft
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