ADP wrote:
>
> Even one of my mechanics at work is getting the jump on the French bike
> theme and got a an interesting frame to make a bike from for Cirque 05.
>
> Lee was cleaning it up today and discovered that someone had done something
> odd to the bottom bracket (I'd like to say MANGLED, but maybe there is more
> to this then what meets the eye) that I've never seen before. Its almost
> as if it is chamfered as opposed to properly faced, but not in a perfectly
> smooth and symmetrical way, its got little scallop marks in the chamfered area.
>
> Is this for the famed Mavic bottom bracket, or did someone just torture a
> perfectly good blue Peugeot?
As Jon mentioned, there was a problem with the Mavic chamfering tool. I don't think that the cutter was dull though, I think the operator didn't use the tool correctly.
I have watched bike mechanics use the tool and wind up with little scallop marks because they allowed the tool to chatter and once it started doing that, it just cut the resulting little scallops deeper and deeper from the cutter chattering.
Chuck Schmidt South Pasadena, Southern California
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