Effects of Loctite on Torque

[Fred]

Thanks Jeff.

Just what the Doctor ordered.

Shiney side up mate.

[excess.11]

This will get you where you want to be..........maybe.
Tables at the bottom of the page seem to refer to what your after.

http://practicalmaintenance.net/?p=422

[Fred]

Thanks for your input Christian.

They're on leave already.

[Christian Raith]

I have an idea.....ring Loctite and ask them.

[pgnz]

At that middle drive to shaft flange, the whole threaded portion can snap off flush if the nut goes missing, happened to mine once, in my case riding too long on a dodgy vibrating U-joint caused it


 tightening bolts/nuts,  about half the torque goes to the friction of the bolthead/nut locking against the surface, the remainder is the threads grinding together, just bung her full of locktite and crank it up tight as per normal,  all good.

a bolt like on the camchain tensioner,  it has no bolthead friction, and the torque is all concentrated to the bolt tip making it extremely easy for ham-fisted gorillas to gleefully tighten things up to around 90 tons extra force not needed.  Seems mainly a Yank thing...

 (they then complain that the XS11 tensioner "stripped itself", and proceed to install a weaker sloppy auto-ratchet unit in it's place)  hehehe

[Jonesy]

Fred it does make a difference,
In the Industrial mechanical fitter game where I learnt my trade, certain bits of equipment we worked on had different torque settings if they were assembled dry or with anti seize paste.......not because it was anti seize but because as you rightly said......a fluid is being introdced between the 2 mating surfaces.
I'm only guessing from this point on and will stop. but I think it was tighter with a fluid than dry.......someone more educated than me will be along shortly to confirm or say different.

[exesiv11]

As a guess I would say it would be the same as tensioning a bolt with oil on it.

I don't imagine it would make much difference either way.

[Fred]

Here's a general question.

Does using Loctite effect the integrity of the torque pulled down on a nut?
I think that it would have to given that you introduce a new element between the two surfaces.

I ask because I'm sick and tired of pulling out the middle gearcase every 600km to retorque the "Self Locking Nut" to 79.6 ft lb on the rear flange before it destroys another oil seal.

I pick up a new nut tomorrow($18.36 ) and am tempted to loctite the bloody thing in.

Oh, before you answer, do you really know or are you making an educated guess like me.
No offence intended guys.