Blank for a ring member of a bearing, manufacturing method for the same, manufacturing method for a ring member of a bearing, and bearing
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United States of America Patent
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Jun 12, 2012
Grant Date -
Oct 15, 2009
app pub date -
Jul 25, 2007
filing date -
Oct 3, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a blank structure for a ring member of a bearing in which a cut target surface after stainless steel is forged has uniform surface characteristics, and highly accurate cutting processing is enabled. A blank (10), which is processed to an outer race (2) and an inner race (3) of a bearing, includes: a cylindrical portion (11, 12) formed by forging a stainless-steel material, and having an inner circumferential surface (11a, 12a) and an outer circumferential surface (11b, 12b) entirely being surface eutectic carbides fragmented beds; and a clamp portion (13) provided to one end portion side of the cylindrical portion (11, 12).
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