Are all balls the same?
The short answer to the question above is NO!
To illustrate that we have done an accelerated durability test
of two different cheap Chinese ceramic balls (both can be found in
bicycle applications) and compared these with the CeramicSpeed
balls.
The result speaks for itself. After only 10 hours both Chinese
balls failed while the CeramicSpeed ball was still in perfect
condition after 600 hours!
The Chinese balls are hard but brittle with a rough surface.
They are harder than steel and in a bearing they would start
grinding the steel races immediately. After few hours the races
would be worn down and the bearing destroyed.
China ball 1
After 10 hours of testing
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Surface before testing
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China ball 2
After 10 hours of testing
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Surface before testing
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CeramicSpeed ball
After 600 hours of testing
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Surface before testing
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