[sdiy] building m7 up to 5/8

[David Brown]

I've gotten away with finding a small washer that would fit inside 
the hole to take up the required space, and then using a larger 
washer on either side of the panel to keep it captive.  Sometimes the 
body of the potentiometer will fit flush enough that it will keep the 
inside captive and you just need the outside washer.

Sometimes you can use a lock washer for the small inside washer as 
they have pretty small OD.  You just need to flatten it.

You could form an inside washer with some heavy gauge wire.  You'll 
need something like a 0.175" width on the inside washer.  That's 
probably too much for a single loop but perhaps you can jury-rig it 
with two loops.

If you have a washer with an ID that is correct but too large of an 
OD, it is pretty easy to grind them smaller.  The opposite, drilling 
a larger ID in a correct OD is pretty hard.

Dave

At 11:20 AM 3/12/2010, Jason Proctor wrote:
>well, i messed up again and bought a crapload of Alpha pots with m7 
>mounting holes, even though the panels they're going into have the 
>regular Bourns/Spectrol/etc size hole.
>
>ISTR some sneaky "neoprene washer" method of building up the shaft (ooer) ?
>
>if this is a janky solution or whatever i'll just send them back and 
>try to find some with the right hole. i suppose it's not too bad 
>given only 2 panels have the big holes.
>
>thanks in advance