Gene,
This is of great interest to me (and others with Herse bikes), but how can you get the bearing out when you can't get behind it? Basically, the outer race is pressed into the BB shell of the frame, the inner race is pressed onto the spindle.
Herse used wads of paper soaked in oil to prevent rust, but after 50 years they have dried out. Now they could become moisture traps, so I remove them. But the ones in the chainstays can't come out unless the BB is removed. And of course, I loathe to throw out perfectly good BB cups, plus the whole issue of originality. But I don't see how even a sophisticated tool could help me.
(These are not cartridges like Phil that slide into the BB shell. The bearings are pressed straight into the shell, which allows using bigger bearings and probably saves some weight. But of course, the BB shell needs to be reamed to the exact diameter...)
Jan Heine, Seattle Editor/Publisher Vintage Bicycle Quarterly c/o Il Vecchio Bicycles 140 Lakeside Ave, Ste. C Seattle WA 98122 http://www.vintagebicyclepress.com
>(clipped) On Jul 31, 2005, at 12:13 PM, Jan Heine wrote:
>
>>1. This sounds like a pressed-in BB, maybe similar to the Herse
>>type? In that case, removing the BB destroys the bearings. (You can
>>press in bearings using a special tool - basically a ring that
>>presses on both inner and outer race at the same time. But to
>>remove the bearings, you hammer on the BB spindle until the bearing
>>on one side comes out.)
>
>This isn't necessarily true. Hammering them out will certainly
>damage the bearings, but in most cases they can be pressed out using
>the proper tool with no damage. Maybe not relevant, if you have to
>remove them you might as well put in new ones. They aren't all that
>expensive...............
>
>For those in the PDX area that might need to use it, I have an old
>Klein tool plus some extra bits made to adapt it to some other
>applications.
>
>Gene Powell
>Rad Finishes
>Portland, OR