Re: [ST] copper grease and torque settings

[John Ulizzi <jaulizzi@xxxxxxxxxxxxx>]

Whatsta matter? Dont you understand Engineerese? I'm
not one, but I know enough of them....

:-)

I gotta admit when I read the first line I thought he
was joking...


---  Kevin Dicks <rawsonboy@xxxxxxxxx> wrote:

> In English please :)
> 
> -----Original Message-----
> From: st-bounces@xxxxxxxxxxxxxxxxxxxx
> [mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf
> Of Chris Harwood
> Sent: Wednesday, June 20, 2007 5:01 PM
> To: ST@xxxxxxxxxxxxxx
> Subject: Re: [ST] copper grease and torque settings
> 
> 
> The relationship between the longitudinal force and
> the rotational one is
> going to be close to direct proportionality to the
> coefficient of friction
> between the two (?) materials (bolt and what it
> screws into). 
> Consequently, reducing the coefficient with a
> lubricant will increase the
> longitudinal force (stretching the bolt) for a given
> torque setting.
> 
> Conversely dirty threads (solidified Loctite or
> gasket sealant) will reduce
> the compressing effect for a given torque.
> 
> Chris Harwood
> 00 RS
> 
> >>> stevenlawler@xxxxxxxxx 20/06/2007 20:14:54 >>>
> In a previous email,  Kevin Dicks wrote:
> > I have been told the total opposite - all torque
> settings are DRY.
> Adding
> > anti-seize, while a good idea for dis-similar
> metals especially,
> effectively
> > acts as a lubricant so the appropriate torque
> settings need to be
> reduced.
> 
> I actually saw this in a seminar on fasteners. The
> set up was a bolt 
> going through a plate that read the compression
> pressure applied by 
> tightening the nut to the proper torque. No
> anti-seize was used. The nut 
> was loosened then re-tightened to the proper torque.
> The reading was now 
> lower. This was done two more times and each time
> the pressure was less
> 
> than the previous time. Anti-seize was then applied
> and the nut 
> re-tightened. The pressure was higher than the
> initial reading. I don't
> 
> know all the physics behind it but that is my story
> and I'm stickin' to it!
> 
> -- 
> Steve Lawler
> Construction Coordinator
> "Taking Chance"
> 
> 
> "If there are no stupid questions, then what kind of
> questions do stupid 
> people ask? Do they get smart just in time to ask
> questions?"
>              -- Scott Adams
> _______________________________________________
> Triumph Sprint ST/RS mailing list
> Send list posts to ST@xxxxxxxxxxxxxx 
> Change your list options at www.Triumphnet.com
> _______________________________________________
> Triumph Sprint ST/RS mailing list
> Send list posts to ST@xxxxxxxxxxxxxx
> Change your list options at www.Triumphnet.com
> 
> _______________________________________________
> Triumph Sprint ST/RS mailing list
> Send list posts to ST@xxxxxxxxxxxxxx
> Change your list options at www.Triumphnet.com
> 

_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx
Change your list options at www.Triumphnet.com