It's been a while, but, the Greenlee Slug-buster with cutting oil on the die and punch. I heard the carbide tipped hole saws with lotsa cutting fluid at a real slow speed works. I would have to use drill bits to get to the size for the 1/2 inch punch. Last week I finally got around to putting some "white out" on the tiny lines for lining the punch up and boy is that nice to be able to see where it's supposed to be. I just smeared it on, wiped it off, and it stayed in the line.
#39332 - 06/16/0409:40 PMRe: Punching SS Enclosures?
heavy pressure. slow speed NO OIL, i can cut holes all day with this method. also. lennox hole saws and hacksaw blades are the best standard holesaw on the market. if you run the speed up you'll temper the stainless and regret it. the special greenlee dies are bronze colored . but ive found for 1/2"-1" you do just as much work making the hole for the lug as hole sawing. also, try using an 11/4 fender washer to stop the holesaw from digging in when you drill your pilot hole.
#39334 - 06/16/0410:29 PMRe: Punching SS Enclosures?
I'll second rizer on the slow and heavy for drilling. I recently had a project that involved installing some SS continuous hinge. I ruined several bits before I went with low speed. Once I figured that out, one bit made a couple of dozen holes without being reshapened.
#39336 - 06/17/0411:25 AMRe: Punching SS Enclosures?
We have worked alot with SS enclosures. In the begining I would jump would go nut's at the length of time and tool damage in punching holes in enclosures. So I broke down and purchased a varity of Greenlee Slug-buster sizes along with SS Draw studs, and Titanium Drill bits for that first hole. We still have tham after numerous years in their own little tool box just for SS work. One thing we noticed is if your punching a bigger hole i.e. 11/4" we punch 1/2" first, then do the 1" stud, then to the 1/1/4". This way the Power unit and punches do not over work, seems to take awhile but it is actually better than breaking a die set or draw stud and having to run around and buy one, which cost's more. PS. The little bit of oil on the punch side of the buster.
#39337 - 06/18/0407:39 PMRe: Punching SS Enclosures?