Ceramic ball, ball bearing, motor having bearing, hard disk...

Details Ceramic ball, ball bearing, motor having bearing, hard disk... Ceramic ball, ball bearing, motor having bearing, hard disk...

2006-04-18

2006-04-18

Griffin, Steven P. (Department: 1731)

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including specified molding pressure or controlling of...

C419S068000, C419S042000

Reexamination Certificate

active

07029623

ABSTRACT:
A method for manufacturing ceramic balls useful as ball bearings is described, wherein spherical green bodies are formed into ceramic balls having few pores and substantially uniform strength distribution, using a rubber die having a hardness not higher than 65.

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http://www.designinsite.dk (printed Mar. 19, 2005).
Japanese Industrial Standard, JIS k 6253: 1997 “Hardness testing methods for rubber, vulcanized or themoplastic”, pp. 1-22 (First English edition published in Dec. 1998, Translated and Published by Japanese Standards Association 4-1-24, Akasaka, Ninato-ku, Tokyo, 107-8440 Japan).

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