f so, a hand,half-round, conical-pointed reamer may be used to scrape theedge of the center hole until the shaft turns true. A goodform of center rest is shown at Fig. 1, a front view. It is acasting in a circular form, with three equidistant projectionsfor the reception of the bearing slides,… … Fiy.2 i<;
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-128-42.webp)
