Manufacturing Industry
Toshiba develops improved production process for ceramic ball bearings
Advanced Ceramics Report, December, 1992
A mass production process for making ceramic bearings which is said to reduce manufacturing time by 50%, and production costs by over 60%, has been developed by Toshiba Corp of Tokyo, Japan.
The current manufacturing process for ceramic bearings involves grinding the bearings for periods of up to a month to obtain the necessary shape and smoothness. This is both very slow and expensive, especially since the yield at the end is not especially high, says Toshiba.
The new system will use magnetic levitation to hold 24 ceramic balls in place between two polishing plates. By halving the grinding time required and increasing the yield, the cost of the bearings is predicted to decrease by about 60% from their current value of US$70 each, reports the Asian Wall...
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