Method for manufacturing a variator disc for use in a toroidal continuously variable transmission
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United States of America Patent
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Sep 15, 2015
Grant Date -
Jan 23, 2014
app pub date -
Jul 15, 2013
filing date -
Jul 13, 2012
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Abstract
A steel disc blank provides a first face with a concave race, a second face opposite to the first face, a central through bore extending between the first and second face, and an outer peripheral edge; the disc blank is heat-treated; then the bore is turned, thus obtaining at least one cylindrical turned portion of the bore, and then the concave race is turned, holding the disc blank locked on the lathe by means of jaws engaging on the machined cylindrical portion, using this turned cylindrical portion as a reference surface for turning of the concave race.
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