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 Post subject: torque wrench
PostPosted: Mon Jan 12, 2009 10:27 pm 
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I see all of the manufacturers quoting torque numbers. But in the real world, does anyone use them? I know they must work great, but for the money you can buy some more bike stuff!


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 Post subject:
PostPosted: Mon Jan 12, 2009 10:43 pm 
Old School Grand Master
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Yes, but certain low torque settings I can do by feel. For things like bb's, cranks etc I always use a torque wrench.


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PostPosted: Tue Jan 13, 2009 9:23 am 
Gold Trader
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With carbon it's crucial you don't overtighten.

I use one. Pro do a nice little set that won't break the bank.


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 Post subject: torque wrench
PostPosted: Tue Jan 13, 2009 11:58 am 
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I'll have to look into getting one. I'm not heavy handed though, so should be ok.


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 Post subject:
PostPosted: Tue Jan 13, 2009 12:01 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
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Location: New Forest, UK
Similarly for anything with aluminium it's a good idea as it's so soft.


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 Post subject:
PostPosted: Tue Jan 13, 2009 12:18 pm 
Retro Guru

Joined: Tue Feb 06, 2007 5:50 pm
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Location: Over there -->
The big trouble is that the torque required to turn a bolt (or nut) a specific distance onto a mating thread is somewhat variable. Factors such as cleanliness of thread, smoothness of the metal surface, the metal(s) themselves (try putting a Ti nut onto a Ti bolt to fully understand the meaning of the word "binding"), surface tratment, etc. all can have a huge effect.

Don't believe me? Try the following experiment:

Take any nut and bolt, assemble them "dry" around some washers to a given torque, counting the turns you have tightened. Undo the assembly and put some grease onto the threads (any grease, or oil, will do) then repeat the assembly to the same torque. You will find that the nut winds on somewhere between 1/8 and 1/2 a turn further for the same applied torque.


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 Post subject:
PostPosted: Tue Jan 13, 2009 1:59 pm 
MacModerator
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Yes for carbon and lightweight components, also if your cack handed. You see some people hanging off allen keys trying to tighten things. If you've been spannering for a while you'll no need one.


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 Post subject:
PostPosted: Tue Jan 13, 2009 2:25 pm 
King of the Skip Monkeys
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most roadie stuff I get has been over tightened

most MTB stuff I get has corroded together

I use big shoulders....


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 Post subject:
PostPosted: Tue Jan 13, 2009 10:10 pm 
Old School Grand Master
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I had a torque wrench but found that I never used it...used the 'feel' instead.
Got me by so far. :?


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 Post subject:
PostPosted: Tue Jan 13, 2009 10:49 pm 
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
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Location: Sunny Glasgow
Torque wrench costs a few £'s
Damaging a Ti or carbon frame or components just aint worth it for so little
money
On critical alloy parts its invaluable


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