Rolling bearing component
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 27, 2004
Grant Date -
May 15, 2003
app pub date -
Oct 22, 2002
filing date -
Apr 22, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A needle case or needle bush produced without cutting for a thin-walled needle bearing is produced without cutting from a cold-rolled strip, which is a heat-treated steel which has the disclosed chemical composition and the disclosed mechanical characteristic values. After a heat treatment, a surface hardness of 860 to 880 HV and a core hardness of 550 to 650 HV are achieved.
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Cited Art Landscape
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