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Drilling Stainless Steel
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From: Thornton, Russ #CSR2000 [SMTP:ThorntoR-at-rc.pafb.af.mil]
Sent: Monday, June 01, 1998 12:09 PM
To: 'Tesla discussion Group'
Subject: RE: Drilling Stainless Steel
This I do have some experience with. I also agree that punching holes
with wood as a back up is easier than drilling. The ragged edges can be
hammered back flat if they wont be in the way.
For the edge of mine, I trimmed off the turned edges. Then on one of the
bowls I hammered the the edge back towards the center just slightly so
that it would grab the other bowl. Worked for me.
Russ Thornton
CSR 2040,
Building 989, Rm. A1-N20
Phone: (407) 494-6430
Email: thorntor-at-rc.pafb.af.mil
>----------
>From: Tesla List[SMTP:tesla-at-pupman-dot-com]
>Sent: Monday, June 01, 1998 12:55 AM
>To: 'Tesla List'
>Subject: Drilling Stainless Steel
>
>
>----------
>From: Edward V. Phillips [SMTP:ed-at-alumni.caltech.edu]
>Sent: Friday, May 29, 1998 3:40 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: Drilling Stainless Steel
>
>"Hi All,
> Like many people, I like to use two large 12 inch salad bowls as a
>top terminal. For my new one, with built in current sensors, I had to drill
>5 holes through the bowls. WOW! was it hard. The stainless steel in those
>things must be very high in chromium content or something. I trashed a
>number of nice drill bits. The titanium nitride bits work for a moment then
>just slide on the surface. If anybody has any better ways to drill nice
>holes through this stuff, I would love to know about it.
>
>Thanks,
>
> Terry Fritz"
>
> Common experience!!!!! Punching works better. The stuff
>work hardens and I have had some drilling success using special
>stainless steel drilling lubricant (mail sample from long ago)
>and feeding the drill in very hard, but not very satisfying.
>I have also used a center punch to dig a hole through the things
>(backed up with wood, of course) then used sheet metal snips
>to enlarge the hole. Whoever invented the miserable stuff was
>no friend of machinists!!! I'll ask you a question. How do
>you handle the rolled edges on the bowls??? In the old days when
>you could get aluminum bowls it was pretty easy to turn the rim
>with a fine saw to separate pieces of it, and then peeled them
>back with needle-nosed pliers. Have never done a satisfactory
>job this way with stainless bowls.
>
>Ed
>
>
>