Lathes Page: 40
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(2) Tailstock off cente.--Tlhe zero lines on the tailstock and cricket
must be in line during any drilling operation.
(3) Lathe speed too slow.-The lathe must turn at the proper
r. p. mn. for the size of center drill used.
CEKITE READ SOCK
Q By herniaphrodite caliper. Q By center head.
o By surface gage and surface plate.
FIGI R;K :,T.- -Locating centers in round stock.
(4) Insufflient cu/tinr9 oil.-The center drill must be well supplied
with a good cutting oil and fed slowly.
25. Grinding centers.-The plain or standard lathe centers are
ordinarily furnished with the lathe. Due to insufficient lubrication,
misalinement, or normal wear, these centers require occasional regrind-
ing which may be accomplished in the following manner (fig. 38) :
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United States. Army. Air Corps. Lathes, book, November 29, 1940; Washington, D.C.. (digital.library.unt.edu/ark:/67531/metadc96655/m1/42/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.