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Ceramic balls anyone?(9 posts)

Ceramic balls anyone?Mike Tea
Dec 9, 2003 2:50 PM
This is interesting -

http://www.velonews.com/tech/report/articles/5327.0.html
re: Ceramic ball definitely in my future!4bykn
Dec 9, 2003 2:59 PM
My Orthopedic surgeon wants to replace my hip with a ceramic artificial hip. I keep putting him off, the original equipment still works (to a certain degree) and I'm not too excited about under going major surgery.

Oh, you meant ball
i bearings
, nevermind.

Ride in Peace...Mike
Discussed last week on the Components siteKerry Irons
Dec 9, 2003 4:38 PM
IMO this is a "no significant improvement for significant cost" option.
Anything..............Mike Tea
Dec 9, 2003 4:58 PM
.....on a $700+ bike would fit your criteria then?
I've used ceramic balls (not in bicycle hub)....Bruno S
Dec 9, 2003 11:12 PM
Silicon nitride balls are widely used in machine tool spindles for long life. These balls are extremely hard (78 Rc) and have very low coefficient of friction. Another advantage if that they are about 1/3 the weigth of steel ball bearings.
Harder, lower friction, more expensive. But do they makeSpunout
Dec 10, 2003 6:21 AM
any difference?

No, IMHO.
Probably an overkill for the application but...Bruno S
Dec 10, 2003 8:58 AM
who are we to stand in the way of progess :-).
What is the point?hudsonite
Dec 10, 2003 6:40 AM
I do not see the point of ceramic bearings. The steel bearings in the better hubs work great and last a long time.

But if at some time in the future, Shimano/DA, Campagnolo/Record or Mavic/SL come out with hubs that use Ceramic bearings, you can bet the rest of the industry will follow on their high end hubs. If Shimano releases DA2007 with ceramic hubs, you will see Campagnolo and Mavic right behind.

There is a lot of technology in cycling that works fine that is replaced with new - better - lighter... bla, bla, bla. It may or may not be, but the public does buy off on this new technology even if there is no 'practical' or 'real' benefit.

I do not see the point of ceramic bearings. But when the day comes where ceramic bearings are on the Trek 5x00 that wins the TDF, you can be sure that consumers will be asking for them!
It's already happenedKerry Irons
Dec 10, 2003 4:42 PM
The new Campy Hyperon Ultra clincher wheels have ceramic bearings and the rims are all CF. Haven't seen a weight yet. Campy states that the bearings will last 4X longer than steel. Given that I have NEVER had to replace a bearing in a Campy hub, BB, or pedal I'm not sure what this longer life is good for. I put 90K miles on a Campy NR group set and only had to replace the chain rings in that time. The wheels are $2200.