Torque Spec For Handlbar Clamp on LItespeed Ti Quill Stem?

[David White]

Anyone know the recommended value for this clamp bolt? Thanks.

 

[Sheldon Brown]

David White wrote:

> Anyone know the recommended value for this clamp bolt? Thanks.

Handlebar clamps should be tightened sufficiently that the handlebar
can't slip.

It is absolutely inappropriate to use some rote torque number for such a
critical fastener.

Sheldon "Torque Wrenches Are Automotive Tools" Brown
+---------------------------------------+
| Whatever became of eternal truth? |
+---------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

 

[[email protected]]

On Wed, 27 Apr 2005 14:57:37 -0400, Sheldon Brown
<[email protected]> wrote:

>David White wrote:
>
>> Anyone know the recommended value for this clamp bolt? Thanks.
>
>Handlebar clamps should be tightened sufficiently that the handlebar
>can't slip.
>
>It is absolutely inappropriate to use some rote torque number for such a
>critical fastener.
>
>Sheldon "Torque Wrenches Are Automotive Tools" Brown
>+---------------------------------------+
>| Whatever became of eternal truth? |
>+---------------------------------------+
> Harris Cyclery, West Newton, Massachusetts
> Phone 617-244-9772 FAX 617-244-1041
> http://harriscyclery.com
> Hard-to-find parts shipped Worldwide
>http://captainbike.com http://sheldonbrown.com

Dear David and Sheldon,

Here's a link to some absolutely inappropriate torque values
that probably tighten clamps sufficiently that the handlebar
doesn't slip:

http://www.parktool.com/repair_help/torque.shtml

The manufacturer probably has specific values, which are
often found by tightening things up gradually, noting the
reading, seeing when things stop slipping, and continuing
until things begin to crack, crush, and fail.

Carl Fogel

 

[David White]

Thanks Carl!

[email protected] wrote:

> On Wed, 27 Apr 2005 14:57:37 -0400, Sheldon Brown
> <[email protected]> wrote:
>
>
>>David White wrote:
>>
>>
>>>Anyone know the recommended value for this clamp bolt? Thanks.
>>
>>Handlebar clamps should be tightened sufficiently that the handlebar
>>can't slip.
>>
>>It is absolutely inappropriate to use some rote torque number for such a
>>critical fastener.
>>
>>Sheldon "Torque Wrenches Are Automotive Tools" Brown
>>+---------------------------------------+
>>| Whatever became of eternal truth? |
>>+---------------------------------------+
>> Harris Cyclery, West Newton, Massachusetts
>> Phone 617-244-9772 FAX 617-244-1041
>> http://harriscyclery.com
>> Hard-to-find parts shipped Worldwide
>>http://captainbike.com http://sheldonbrown.com
>
>
> Dear David and Sheldon,
>
> Here's a link to some absolutely inappropriate torque values
> that probably tighten clamps sufficiently that the handlebar
> doesn't slip:
>
> http://www.parktool.com/repair_help/torque.shtml
>
> The manufacturer probably has specific values, which are
> often found by tightening things up gradually, noting the
> reading, seeing when things stop slipping, and continuing
> until things begin to crack, crush, and fail.
>
> Carl Fogel
>
>