Dynohub Keeper Ring

[simmitc]

Hi all
Apart from the Minors, we own a few traditional british bicycles which are fitted with dynohubs to power the lights. I really need to strip one down for which I need a special Dynohub Keeper Ring that prevents the magnets losing their magnetism. Does anyone by any chance have one or know of one for sale?

Dynohubs themselves are easy enough to get hold of, but I need the ring, which is classed as a service tool. Probably I'm looking for an old established old fashioned bicycle shop that might have one or two on the bench or perhaps is about to close down.

Any leads will be gratefully received. Thanks.

[JimK]

You could use another armature - it doesn't specifically have to be the keeper ring, just some steel.

Or do you have any contact that could machine something for you? The keeper ring is just a piece of mild steel the same diameter and width as the armature and about 2cm wall thickness.

[alanworland]

All the good old bike shops round here have long since gone where you could buy Sturmy Archer spares!
As a kid I wired one of these dyno hubs to the mains (through a current limiter) to make it run as a motor!