13/16" Greenlee hole punch for 22mm switch installation?

[stickyfinger]

Hi,

I need to purchase a 13/16" Greenlee hole punch for installing ball valves in SS pots, such as in the example at theelectricbrewery.com (though, this example is for the heating element install at 1.25")

http://www.theelectricbrewery.com/node/9?page=6

Does anyone know if you can use the 13/16" Greenlee hole punch (20.6 mm) to install 22mm switches and lights, such as the Auber SW1?

http://www.auberins.com/index.php?main_page=product_info&products_id=223

The SW1 info says it requires a 22.5mm hole, but I thought the 13/16"(20.6mm) might work if you screw the switch into the hole and kind of force it a little. I'd love to save money on that and make really nice holes in the panel.

 

[mabrungard]

If you were a professional electrician, then you should get the Greenlee equipment. However if you are just popping a few holes, then you should consider the hole punch set from Harbor Freight. I have that set and it worked very well for the holes needed to create my panel.

http://www.harborfreight.com/knockout-punch-kit-91201.html

 

[stickyfinger]

How many holes did you make with one punch? (just want to gauge how many it can do before getting dull)

I plan on using them for 1mm thick stainless steel. Were your pots comparable?

 

[mabrungard]

The steel enclosure was comparable to your pot, probably thicker. I probably punched at least a dozen holes and I don't see any sign of dulling. Even though they are cheap, they seem to be good enough for at least 'dozens' of holes.

 

[stickyfinger]

Good to know. looks like that would work well for at least the 22mm switches/lights. i'll need something else for the ball valves. I assume you used hole saws to cut the receptacle holes?

 

[mabrungard]

Dremel tool with a cutoff wheel and a grinding drum. Lots of time.