Originally Posted by Quaffer
In case somebody does not know this, the 1/2" conduit punch actually cuts a 7/8" hole. This is perfect for soldering/welding 1/2" couplings using the keg tool, and it is also the correct size for 22mm switches and pilot lights. 7/8" = 22.2mm. It opens up new possibilities for getting a punch that will work for us. I got a 1/2" conduit punch, but I will have lots of uses for it in the foreseeable future.
Interesting timing on this post - I just came to that exact realization no more than 5 minutes ago.
Does anyone have a feel for the best method to cut all those 22mm switch and pilot light holes? Punch, hole saw, or step-bit?