large solid (being nearly of the same size) when heads are too cumbersome, and are not belted to run at a suf- required, and obviates the necessity ficiently high rate of speed. In such cases, the arrange- of having more than three or four face plates of metal. Its ment shown in Fig. 55 is an… … groove, it will be observed, extends entirely across the top firmly fixed to the joists, C, and to the flooring at D, right Another method of making a chuck is shown in Ficr. 58. of the anvil head, so that a large surface for the passage of over and upon the joists supporting the flooring, or else…
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