[sdiy] Why I was asking about UNEF etc.

[jhaible at debitel.net]

> Personally, I'd say you're asking for trouble by threading a pot directly
> into an aluminum panel. In a relatively thin sheet of aluminum, you're not
> going to get too many threads. For example, even if the panel were 1/4"
> thick (about 6.3mm), you are only going to get 8 threads. If the panel is
> 1/8", you're only getting 4 threads. You won't be able to get enough torque
> on the pot to hold it in place reliably and this means that it is going to
> be VERY easy for the threads to strip. 

The panel is 3mm - this is thicker than the nut that comes with the
pot, so I guess vertical forces cannot be a problem. The question
is whether _rotational_ forces can do more harm in this case than
with a nut. With a nut, the front panel is clamped between the
pot's body on one side and the nut on the other side. If I apply
rotational force on the body (via the shaft in end position),
the nut can get loose, too. With a thread in the front panel,
the front panel "is the nut". So there should be no difference:
this the first resistance to overcome for turning anything loose
would also be the clamping, or pressure - this time, between
the panel and the pot's body. Is there a difference?

My gut feeling says there *must* be a difference, but
I'm too blind to see it.

> Are you using panel nuts? They're special purpose nuts that
> are very thin. Again, they'll only have 4 or 5 threads, but because they're
> made of steel they are much stronger and will hold just fine.

Ahh, maybe this is the difference, steel vs. aluminium.
But then again the thread on the pot is made of plastic anyway.
So ist there a difference still ?

JH.


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