Mashed BB thread Al...
 

[Closed] Mashed BB thread Alu frame help!

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Have an Alu Sirroco frame which I love but the drive side BB thread is completely mashed! I have bodged it with chemical metal but there is still some play in the crank so I assume it will get worse quickly!

Is there a threadless BB shell I can use or could the threads be re-tapped... help please!

New baby means new frame (even an 'old' new frame)out of the question!

A


 
Posted : 03/03/2012 5:30 pm
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contact betd they do a bonded insert, they fixed my old dale a treat.
can't remeber how much maybe a ton for both sides?


 
Posted : 03/03/2012 5:51 pm
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[url= http://www.mountainbikecomponents.co.uk/items.asp?CategoryID=236&Name=Frame+repairs ]Betd[/url]

My Prophets off there this week, when I get my bottom into gear.
£60 for the one side or £90 for both, with a £10 or so P&P back apparently. Sale's person say they like to keep it a week to make sure it bonded 🙁

Have heard say that [url= http://www.bobjacksoncycles.co.uk/repairs.php ]bob jacksoncycles[/url] can offer a similar service


 
Posted : 03/03/2012 6:44 pm
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Brilliant! Email sent! Will be great to get it sorted it is my least knackered frame at the moment, should have done this ages a go!

Ta!


 
Posted : 03/03/2012 7:08 pm
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If email sent you mean to Betd, don't bother awaiting the reply, pack up the frame and send it in with a note: what you want done and contact details, so they can ring you for the payment. I've rung twice (mines been bust 5 months, and just packed it this week) & that what they say to do.
They seem to prefer to fit the new BB, asking me to send in a BB for them to fit (got to re-open my box...).

Lots of thread on here about it, so I'm imagining it must be reliable.

Oh and they did ask for a seat post & clamp to make it easier to work on the frame.


 
Posted : 03/03/2012 7:14 pm
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The frame could be retapped to a Italian threading (it's larger at 36mm) but then you would need an external BB with Ital threads (road BB) and use the axle pipe from a 68/73mm BB (as Ital BB shells are 70mm wide). A square taper 70mm Italian BB could run in a 68mm shell with a spacer. This would be cheaper.


 
Posted : 03/03/2012 8:52 pm
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cheers zippy will send it off but might try ringing first!


 
Posted : 03/03/2012 9:45 pm
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I have the same problem on an alu frame 🙁

Wondering if these press fit BB's are a possibile solution?

http://www.chainreactioncycles.com/Models.aspx?ModelID=55293


 
Posted : 03/03/2012 10:00 pm
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I was hoping some one would suggest that! I have no idea but there must be something out there.. I have heard rumours but nothing conclusive. If it only costs £70 with p&p it is money well spent to get it sorted with BETD!

filling the threads with filler adhesive doesnt work at all


 
Posted : 03/03/2012 10:11 pm
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There is a simple square taper BB that pushes straight in.
[url= http://s383075164.e-shop.info/shop/article_287.005/YST-Corp-Threadless-Cartridge-Square-Taper-Bottom-Bracket.html?pse=coa ]A bit like this ??[/url]
Being captain tight pants - I would go for this option.


 
Posted : 03/03/2012 10:15 pm
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I would give one of those a try but I need a 73mm shell and can't fine one anywhere. Hence looking at the external press fit ones, just not sure if they are a viable solution.


 
Posted : 03/03/2012 10:36 pm
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I spoke to Argos this morning about having my frame repaired. Argos wins on three counts for me:

1. It's local, so no postage
2. It's cheaper (£75 vrs £90 at BETD for both sides)
3. I think the Argos repair method is possibly better. They fit a one piece full witdth steel threaded sleeve. Not saying there is anything wrong with BETD helicoil method, I'm sure it's a sound repair. I have used them with good results on ally engine blocks with stripped manifold threads. But to my mind the one piece insert is preferable.


 
Posted : 05/03/2012 12:09 pm