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 73
urate and the screw will not be straight when putin place. After the threads are started, the tap is tirstadvanced and then the direction is reversed for a revo-lution or two to relieve the strain on the tap. For everyrevolution the tap is reversed, it is advanced three orfour. This is continued… … Fig- 75—Three large hand taps of different size great strain will be imposed upon it and it will probablysnap in two before it is advanced very far. Taps areextremely brittle and they must be handled with greatcare. This is especially true of the smaller sizes. Afterthe mechanic has used a tap a…
Machine-shop practice · Handicraft
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