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Front bearings
#21
I put up that page from the Trader handbook tongue in cheek not as a serious suggestion. It was a 1950 advertisement, presumably a viable proposition at a time of shortages after the War.
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#22
Tony Press wrote:

Unfortunately knocking angular contact bearings apart can indent the balls causing later problems.

Using unmatched balls defeats the purpose of the original set of carefully matched balls.
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Yes Tony, probably counts as "bad practice" these days. But it did keep my Ruby on the road as a penniless apprentice forty five years ago and didn't cause problems in reality. The takeaway is that corrosion in the tracks will lead to complete failure in a very short time so however you choose to inspect second hand bearings, make sure you're confident that there aren't any rust pits present.

These days, I use new bearings (reduced width pairs are available in the UK) exclusively as it isn't worth messing about with old ones. 

So what should I do with the drawer full of used N1919 sets in the garage??
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#23
From one of our cherished suppliers, can not remember which one though.
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