Identifier: metalspinning00tuel (find matches)
Title: Metal spinning
Year: 1912 (1910s)
Authors: Tuells, C Painter, William A
Subjects: Metal spinning
Publisher: New York city, The Industrial press
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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n with a sectional chuck. For spinning operations upon tubing or press-drawn tubes, steelarbors are generally used. Tubing may be readily spun upon an arborand it can be reduced or expanded to comply with the shape of shellrequired much more quickly than the shell could be spun from theblank. Followers For holding the sheet metal blank to the spinning form, a blockof wood known as the follower, is used (see Fig. 6). Followers aremade to suit the shape of the work with which they are to be em-ployed, always being made with the largest possible bearing on thework; thus a shell with a flat bottom twelve inches in diameter wouldbe turned with the aid of a follower having an 11%-inch face, whilea shell with a 4-inch face wculd take a follower with a 3%-inch face.All shells do not have flat bottoms, consequently, in spinning such asdo not, it becomes necessary to employ hollow followers. Hollow fol-lowers have their bearing surfaces turned, out to fit the ends of ihs jS/o. 57-METAL SPINNING
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PRINCIPLES OF METAL SPINNING 9 forms with which they are to be used. In practice, the blank is heldagainst the end of the spherical form with a small flat follower untilenough of the shell has been spun to admit of the hollow followerbeing used. All followers are made with a lajge center hole in oneend to receive the revolving tail-center. In starting to spin a difficult shell it sometimes happens that thenecessarily small follower will not hold the blank. To prevent thisslipping, the face of the follower is covered with emery cloth. Often,however, on rough work, the spinner will not stop to face the fol-lower, but will make a large shallow dent at the center of the blank;the extra pressure required to force the metal against the form willusually overcome the slipping tendency. Hand Tools Hand tools, in great variety, form the principal asset of the spin-ners kit. Spinning tools are made of tool steel forged to the re-quired shapes, and are hardened and polished on the working end.The

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