Chasing bottom brac...
 

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[Closed] Chasing bottom bracket threads through - easy job?

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 benz
Posts: 1143
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Topic starter
 

Alu frame back from powder coaters with some overspray into bb threads.

Will try Nitromors and gentle brushing, but if this does not work, then should it be a quick, easy and cheap job to do?

Or could I do it myself with a tap or is it a die?!?


 
Posted : 16/04/2009 9:25 am
Posts: 0
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If you have one of these, its a simple job!

[img] [/img]

Remember the B/B has left and right hand threads....


 
Posted : 16/04/2009 9:34 am
Posts: 953
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It's a tap. Best to get your LBS to do it, although I have used an old steel cupped bottom bracket (shimano square taper) to do it once.


 
Posted : 16/04/2009 9:36 am
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as above i used an old stainless steel bb to do one the other week and it was fine


 
Posted : 16/04/2009 9:38 am
Posts: 34483
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Cut some slots in a steel BB cup, and your good to go. Nice and steady does it.


 
Posted : 16/04/2009 9:40 am
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Really nickc? I'd have thought without a taper and a way of aligning the axes (plural of axis) there's be a real risk of cross threading.

Note - I am into my bodging!


 
Posted : 16/04/2009 10:10 am
Posts: 97
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1/4 section of an old steel cup & gentle working should do it.
I bought a Rock Lobster from Merlin once & had to send it back due to overspray on the b/b threads. It was bad though, totally un-masked during powdering.


 
Posted : 16/04/2009 10:14 am