I've worked out a method of re-grinding brinelled headset races using a lathe and a small curved grinding stone mounted in a Dremel tool. It's a bit tedious because the Dremel tool has limited power, but the results seem good. I grind the crown race while it is mounted on the fork, which gives a very true finished product. I'm not sure whether the races are surface-hardened (anybody know?), and whether I could grind through the hard layer into the base metal. So far I don't get the impression of grinding through into a softer layer. I haven't yet disassembled or re-inspected the two or three I've done so far, and I haven't put many miles on any of them yet, but so far I haven't noticed any indexing.
So if any of you have brinelled headsets you would like to sell me cheap, let me know!
Brian Samson Vancouver, BC, Canada.
On 23-Nov-09, at 2:53 AM, Ken Freeman wrote:
>
> I've often wished some skilled CR member could re-machine NR races.