Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 484
le is guided by a smallerhole first drilled in the axis of the larger hole. The pilothole is more easily drilled in its true position than the largerone, because the cutting-planes of the small drill come to asmaller edge at its point, and less trouble and time need betaken to keep the drill to… … Fig. 382. In the roller form three rollers are borne upon segmentswhich guide them, and upon which radial pressure can bebrought by the central conical or tapering pin. When therollers inside the tube are opposite the tube-sheet or justbehind it, upon the inside of the tube, the rollers are…
Mechanical engineering · Steam power plants
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