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Replacement for cup and cone bearings

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Replacement for cup and cone bearings

Post  EXJ17 on Thu Jul 06, 2017 11:30 am

I have a 1938 Cruiser 45 with cup and cone wheel bearings. I want to replace them with ball races. This will involve making a stepped sleeve to hold the inner races or even a new wheel spindle. The precise outer diameter (39mm) bearing does not seem to appear in the bearing catalogues. I don't want to turn out the hub so need 2 thin bushes to hold slightly smaller outer bearing races in the hub.
Does anyone know who might do the machining work? I am willing to pay a proper price.
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Replacement for cup and cone bearings

Post  Neil Lewis on Thu Jul 06, 2017 2:23 pm

Hi

Interesting discussion point. I am riding around on a Model 4b with still has cups and cones, which brings the question it was designed that way why change?

But I am also part way through restoring a flat tank Raleigh from 1926. Some one in the past changed the front wheel to include a drum brake and bearings instead of cup and cone. I think they turned out the hub, but one though crossed my mind when I read your note have you thought of asking some of the suppliers of old bearing if they have an imperial sized on that will fit directly into the hub? Just a throught.
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bearing

Post  john87 on Thu Jul 06, 2017 2:59 pm

How is a bike from 1938 going to have a 39mm diameter bore anywhere. It is not even close to a fractional size.. How did you measure it??

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Odd Sizes

Post  piston 197 on Thu Jul 06, 2017 3:57 pm

I know strange isn't it , the piston in a 1938 Cruiser will be 63mm and the oversizes in + thousandth of an inch sizes, the Villiers engines 8E,9E etc used metric main bearings, but when the AMC engine came along the bearings were imperial sizes.
We were first going for decimal coinage around 1850 when the Florin/2 shilling piece was issued to give 10 to the pound, it continued happily until 1968 before we made another attempt and 1971 when we finalized it
JH
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Strange sizes!!

Post  john87 on Thu Jul 06, 2017 5:28 pm

All very peculiar stuff!!

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Re: Replacement for cup and cone bearings

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