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Main
Date: 09 Oct 2007 21:59:28
From: Patrick Lamb
Subject: Chainring bolts
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Noticed the other day my two big chain rings (out of three) were
flopping a bit, which led to my discovery that the bolts were loose.
So I tightened them.
Is that enough?
Or should I try to clean the bolts and whatever they screw into, and
reassemble with Loctite?
Pat
Email address works as is.
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Date: 13 Oct 2007 20:24:14
From: Donga
Subject: Re: Chainring bolts
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On Oct 11, 12:21 pm, Reid <rra...@gmail.com > wrote:
> Patrick Lamb wrote:
>
> [snip]
>
> > Thanks to both you and Sheldon for the quick answers (and agreeing!).
> > This is the first time I've seen something like this; is it a common
> > problem?
>
> [snip]
>
> Agreement is not a common problem on this group.
Yes it is!
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Date: 14 Oct 2007 01:03:31
From: amit.ghosh@gmail.com
Subject: Re: Chainring bolts
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On Oct 9, 10:59 pm, Patrick Lamb <pdl678NOS...@comcast.net > wrote:
> Noticed the other day my two big chain rings (out of three) were
> flopping a bit, which led to my discovery that the bolts were loose.
any more than three chainring bolts is overkill.
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Date: 13 Oct 2007 20:38:25
From: A Muzi
Subject: Re: Chainring bolts
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> Patrick Lamb <pdl678NOS...@comcast.net> wrote:
>> Noticed the other day my two big chain rings (out of three) were
>> flopping a bit, which led to my discovery that the bolts were loose.
amit.ghosh@gmail.com wrote:
> any more than three chainring bolts is overkill.
TA Professionel? Original Campagnolo chromed GS?
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
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Date: 13 Oct 2007 17:32:34
From: Sheldon Brown
Subject: Re: Chainring bolts
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Someone wrote:
> But note that torque specs are often specific for dry, clean,
> fasteners and they change if you lube the items involved.
Right. That's one of the reasons I consider most bicycle torque specs
to be snake oil.
Sheldon "http://sheldonbrown.com/tork-grip" Brown
+--------------------------------------------------------+
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Date: 13 Oct 2007 18:23:19
From:
Subject: Re: Chainring bolts
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Sheldon Brown writes:
>> But note that torque specs are often specific for dry, clean,
>> fasteners and they change if you lube the items involved.
> Right. That's one of the reasons I consider most bicycle torque
> specs to be snake oil.
http://sheldonbrown.com/tork-grip
Beyond that, what is "dry/clean"? If I run this through a good
degreaser and tighten a bolt in a truly dry environment, the parts
will seize. This arises from the rule that "No two solid objects can
slide over each other without a lubricant. If there is no lubricant,
then one or both materials will reach melting temperature at asperity
contacts to furnish that lubricant."
Lubricant can be adsorbed moisture in some instances.
For rail passengers this is apparent from the thump-thump-thump of
flat wheels that skidded for a moment when braking, or from the
surface of a brake disk with a glazed surface.
Jobst Brandt
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Date: 11 Oct 2007 07:25:21
From: Qui si parla Campagnolo-www.vecchios.com
Subject: Re: Chainring bolts
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On Oct 10, 8:21 pm, Reid <rra...@gmail.com > wrote:
> Patrick Lamb wrote:
>
> [snip]
>
> > Thanks to both you and Sheldon for the quick answers (and agreeing!).
> > This is the first time I've seen something like this; is it a common
> > problem?
>
> [snip]
>
> Agreement is not a common problem on this group.
WHADAYAMEANBYTHAT!!!!
;=l)
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Date: 11 Oct 2007 06:26:23
From: sergio
Subject: Re: Chainring bolts
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On Oct 11, 4:21 am, Reid <rra...@gmail.com > wrote:
> Patrick Lamb wrote:
> > Thanks to both you and Sheldon for the quick answers (and agreeing!).
> > This is the first time I've seen something like this; is it a common
> > problem?
> Agreement is not a common problem on this group.
No to disprove anything, let me add a suggestion.
Make sure the nut does not rotate in place why you turn the screw into
it.
Sergio
Pisa
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Date: 10 Oct 2007 05:38:37
From: Qui si parla Campagnolo-www.vecchios.com
Subject: Re: Chainring bolts
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On Oct 9, 8:59 pm, Patrick Lamb <pdl678NOS...@comcast.net > wrote:
> Noticed the other day my two big chain rings (out of three) were
> flopping a bit, which led to my discovery that the bolts were loose.
> So I tightened them.
>
> Is that enough?
>
> Or should I try to clean the bolts and whatever they screw into, and
> reassemble with Loctite?
>
> Pat
>
> Email address works as is.
Grease onto the threads, wee bit of grease between the rings and the
crank..make 'em tight.
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Date: 10 Oct 2007 20:54:36
From: Patrick Lamb
Subject: Re: Chainring bolts
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On Wed, 10 Oct 2007 05:38:37 -0700, "Qui si parla
Campagnolo-www.vecchios.com" <peter@vecchios.com > wrote:
>On Oct 9, 8:59 pm, Patrick Lamb <pdl678NOS...@comcast.net> wrote:
>> Noticed the other day my two big chain rings (out of three) were
>> flopping a bit, which led to my discovery that the bolts were loose.
>> So I tightened them.
>>
>> Is that enough?
>>
>> Or should I try to clean the bolts and whatever they screw into, and
>> reassemble with Loctite?
>
>Grease onto the threads, wee bit of grease between the rings and the
>crank..make 'em tight.
Thanks to both you and Sheldon for the quick answers (and agreeing!).
This is the first time I've seen something like this; is it a common
problem?
Pat
Email address works as is.
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Date: 10 Oct 2007 22:08:41
From: A Muzi
Subject: Re: Chainring bolts
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>>Patrick Lamb <pdl678NOS...@comcast.net> wrote:
>>> Noticed the other day my two big chain rings (out of three) were
>>> flopping a bit, which led to my discovery that the bolts were loose.
>>> So I tightened them.
>>> Is that enough?
>>> Or should I try to clean the bolts and whatever they screw into, and
>>> reassemble with Loctite?
> "Qui si parla Campagnolo-www.vecchios.com" <peter@vecchios.com> wrote:
>> Grease onto the threads, wee bit of grease between the rings and the
>> crank..make 'em tight.
Patrick Lamb wrote:
> Thanks to both you and Sheldon for the quick answers (and agreeing!).
> This is the first time I've seen something like this; is it a common
> problem?
Yep. Dry, poorly torqued fasteners are a chronic problem.
Grease the bolt and under the head, not the nut, as Sheldon noted already.
Then start checking other threads. Did the same guy assemble your
brakes? The adjuster and anchor will likely be dry and rust-prone. Keep
going with that, as dry fasteners don't torque properly and will corrode
if they don't drive you crazy with noises first.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
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Date: 11 Oct 2007 19:58:57
From: still me
Subject: Re: Chainring bolts
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On Wed, 10 Oct 2007 22:08:41 -0500, A Muzi <am@yellowjersey.org >
wrote:
> Keep
>going with that, as dry fasteners don't torque properly and will corrode
>if they don't drive you crazy with noises first.
But note that torque specs are often specific for dry, clean,
fasteners and they change if you lube the items involved.
Regards,
Still "using my right hand as a calibrated torque wrench so it likely
doesn't matter to" me
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Date: 10 Oct 2007 20:21:10
From: Reid
Subject: Re: Chainring bolts
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Patrick Lamb wrote:
[snip]
> Thanks to both you and Sheldon for the quick answers (and agreeing!).
> This is the first time I've seen something like this; is it a common
> problem?
[snip]
Agreement is not a common problem on this group.
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Date: 11 Oct 2007 20:11:00
From: Tom Sherman
Subject: Re: Chainring bolts
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Reid Ramos? wrote:
>
> Agreement is not a common problem on this group.
You are wrong. ;)
--
Tom Sherman - Holstein-Friesland Bovinia
Beer - It's not just for breakfast anymore!
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Date: 09 Oct 2007 20:52:56
From: Sheldon Brown
Subject: Re: Chainring bolts
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Quoth Patrick Lamb:
> Noticed the other day my two big chain rings (out of three) were
> flopping a bit, which led to my discovery that the bolts were loose.
> So I tightened them.
>
> Is that enough?
>
> Or should I try to clean the bolts and whatever they screw into, and
> reassemble with Loctite?
Loctite is a Bad Idea for this application. I generally use my
favorite, Phil Wood Tenacious Oil for this. Oil the threads and the
underside of the bolt heads, but try not to get any oil on the
outsides of the nuts.
It seems counterintuitive to lubricate threads, but actually it's
generally the best way to go for things that need to be tight.
Lubricating the threads means that more of the torque you apply to the
wrench goes to tightening the fastener, and less to overcoming the
friction of the threads.
Loctite is good for adjustment screws and the like that don't get
fully tightened down against anything solid.
Sheldon "Oil" Brown
+----------------------------------------------------+
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