Stud Fitting

[JasB]

Is there an adhesive, or some other chemical normally used to secure studs into a threaded hole, such as an engine block? I am sure I remember someone in the dim and distant past using some compund to ensure they didn't vibrate loose.

 

[ccscott49]

Loctite.
Available at a decent motor factors, there are different types/grades ask for the exact one you need.

 

[macd]

Oddly enough, I seem to recall the Loctite version once being sold as 'Studlock'. Now it's Loctite 2701. Other proprietory brands often use different variations on the same 'studlock' theme. On endurance racing bikes, we sometimes used it instead of ordinary threadlock on crucial components that had a habit of coming apart, but only if they had accepted a standard sized tool (i.e. not such things as countersunk socket heads, which are easily rounded off).

Check out www.loctite.co.uk if you need more info.

 

[Poignard]

Before these compounds were invented people just used to screw the stud tightly into the head using two nuts locked together on the protruding part of the stud. Seemed to work ok where the stud was screwed into steel or iron.

 

[JasB]

That was the method I was favouring...the lock nut...it can be easily undone whereas the glue/resin method seems a little too permanent

 

[john_morris_uk]

You can get different grades of 'loctite' for different applications. They give the newton metres of torque required to 'undo them' once they are set.

I know this as I remember choosing a high value one, and the engineers shop reassured me that if I ever wanted to undo the bolt again, a lower one would be fine!

Years ago, I only ever remember fluid ones, but the one I have in my toolkit on board now is like a lipsalve. (I did buy it in France though.)

 

[macd]

Using a locknut to wind the stud home is still what you do, whether you use a locking compound or not. The locking compound is formulated to be broken, requiring different torque for different grades, as JM describes.

 

[Slowtack]

Certain locking compounds may be released by heating the bolt/nut.