The thread in a Campagnolo braze-on gear lever boss is m5 x 0.8 David Benson Auckland, New Zealand
________________________________ From: Drew Ellison <drew@masirider.com> To: Louis Schulman <louiss@gate.net> Cc: Classic Rendezvous <classicrendezvous@bikelist.org> Sent: Saturday, 27 June, 2009 2:32:18 PM Subject: Re: [CR] Clamp-on shift lever bosses (or, Zut Alors!)
Gosh, I don't know what the tap was. And for the life of me, I don't know how I would have figured it out. Oh, I guess I must have tried a Campagnolo mounting bolt in different dies until I found the one that fit, then used the corresponding tap. I've got one of those cheap metric tap and die sets from Harbor Freight Tools, which are very cheap, in price and quality. But if you only need a tap a couple of times per year, then they're okay. If I had a very significant project I needed a very professional result, I'd buy a good quality tap for that use. YMMV.
Drew Ellison Everett, Washington USA
On Jun 26, 2009, at 7:04 AM, Louis Schulman wrote:
> I was thinking of this very thing. Do you know the specific tap I need?
>
> Thanks,
> Louis
>
> -----Original Message-----
>> From: Drew Ellison <drew@masirider.com>
>> Sent: Jun 25, 2009 11:46 PM
>> To: Louis Schulman <louiss@gate.net>
>> Cc: Classic Rendezvous <classicrendezvous@bikelist.org>
>> Subject: Re: [CR] Clamp-on shift lever bosses (or, Zut Alors!)
>>
>> Louis,
>>
>> Good luck on finding such a beast. There are some Campagnolo clamp on
>> shifters where one could remove the shift levers and the remaining
>> bosses are the same format as braze-on shifter bosses. But not all
>> Campagnolo clamp-on shifters are this way. So be careful if you go
>> this route.
>>
>> I know of no other readily available clamp-ons such as this. I spent
>> quite a while looking for just this thing a while ago and ended up
>> buying an NOS Huret downtube clamp-on shifter bosses which look like
>> they would do the same thing. I think the threading on the hole was
>> slightly different than standard, so I tapped the hole and it worked.
>> Not as elegant as the Campagnolo would have been, but it works.
>>
>> Drew Ellison
>> Everett, Washington USA
>>
>> On Jun 25, 2009, at 7:24 PM, Louis Schulman wrote:
>>
>>> Recently, there was a discussion about different threading on
>>> shifter bosses. My problem is that I have a set of Sachs-Huret
>>> levers for standard braze-ons, so they won't go on my Huret clamp-on
>>> bosses, which have the different French threads. Zut alors! C'est
>>> ironique, n'est-ce pas? I do not want to switch out the special
>>> fixing screws.
>>>
>>> Here is the question. Is there a clamp with bosses, where the
>>> bosses are the same as braze-on bosses? That is, the bosses have
>>> the standard square bases and round shafts with normal threads? I
>>> have several clamp-on shifters, but the clamps are all unique to the
>>> shifters.
>>>
>>> If there is such a thing, does anyone have one they would like to
>>> part with?
>>>
>>> Thanks,
>>>
>>> Louis Schulman
>>> Tampa, Florida USA
>>> _______________________________________________
>>
>
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