ball bearings

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archy sturmer
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Location: St Albans, Herts

ball bearings

Post by archy sturmer »

I get the impression that ball bearings come in various hardnesses.
Am I right in thinking that harder is not necessarily best?
If you're rebuilding a cup and cone bearing, presumably you would want the wear to be taken by the most easily replaced part - ie, the ball bearings.

If this is the case, how would you set about choosing which hardness of ball to go for.

(The bearings I intend to rebuild are a pair of mks sylvian pedals, so I dare say not really worth worrying about)

Any suggestions or thoughts?
( I am not an engineer, as is probably apparent from this question!)
Thanks! - AS
That's not a recent photo, by the way
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Mick F
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Post by Mick F »

I know that balls come in "grades". The higher the grade number, the more accurate the sizing. You need all the balls to be EXACTLY the same size, a big one would take all the weight, or a small one none of the weight.

So it's always best to discard part packets as they're made in batches.

As for hardess, dunno!
Mick F. Cornwall
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georgew
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Post by georgew »

If you go for grade 25 then you know that you can't do better. Probably overkill but do make sure they are all the same batch.
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archy sturmer
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Post by archy sturmer »

Thanks , folks!
That's not a recent photo, by the way
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