Vintage, yesteryear and retro biking
11 posts • Page 1 of 1
Does anyone (preferably Perth - but anywhere) have a bottom bracket chamfer tool they would be willing to hire/lend/trade or sell? Or would they be willing to just chamfer my bottom bracket? I am trying to salvage a Schumacher frame with damaged bottom bracket threads. I bought a mavic bottom bracket - before reading that I need to seat it with an accurate 45 degree beveled edge. I'm a large unit so I'd better do it properly.
I know that you can get velo orange bottom brackets but am told the mavic is better (and I already have it).
Get a file or a dremel out.
Those tools are nice, but I wouldn't despair if nobody local has one. The cup/lockrings will act as a guide ... use a marker pen on the surface you're filing and seat the cup so it shows any high points. It'll take a bit of time but it can be done so long as you're patient.
Btw, did you buy this a few months back?
Yup - did I buy it from you Spirito? (My mailbox was full so I deleted everything). I've finally gotten around to this project and it has stalled already. I did think about the file approach - but I'm not sure my patience and skill level will be up to it and for me a tool with a guide is probably the only way. I had a bit of a search on line and most other such tools are either too small or are for for wood or plastic.
Thanks for the suggestion though......
Yeah, that was probably me. Shame were not closer as I could do this for you in about 20mins. It's just a matter of laying the frame in it's side and working slowly around until you have a nice chamfered (or beveled edge). Most any good machinist, metalworker or tradie could do it fairly quickly. The lockring-cup would act as their guide.
Also insert the cartidge without the lockring's to see if you need to file down any threads on the inside.
Sorry, I don't know anybody with the Mavic chamfering tool. You might perhaps ask bicyclepassion from this forum as he might know someone who does (just guessing).
I believe the Schlumpf chamfering tool also does exactly what you are wanting to do and they are much more prevalent then the mavic bb tool.
Here is the Schlumpf manual which says it also chamfers to a 45% angle, check out "Installation" on page "B1".
Edit: Further confirming the previous - http://www.retrobike.co.uk/wiki/Mavic_B ... amfer_tool
11 posts • Page 1 of 1
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