Re: copper washers

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 

What? Have someone else do the work? And here I was getting ready to smelt
the copper ore in the backyard...

Ed, as usual, has a great idea.  Any decent sheetmetal shop will have a
whole raft of punches and can make as many washers as you could conceivably
use.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, November 23, 2003 4:24 PM
Subject: Re: copper washers


 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >
 > I've been reading all of this stuff on washers and haven't seen anyone
 > mention the most obvious way of making big washers (that was the
 > original topic wasn't it?).  Most sheet metal shops have a rotary hole
 > punch (Rotex or equivalent) which has a bunch of round punches which can
 > be rotated to select the size and then a hand lever operates the punch.
 > Trick is to start with a center punch mark, punch out the larger
 > diameter first, then using the same center punch mark, punch the inner
 > hole.  My guess is that it wouldn't be hard to find a shop with one
 > which they'd either let you use or else charge a small nuisance fee to
 > do it for you.  I've seen punches as small as 3/8" and as large as
 > 2-1/2", not necessarily in the same head.  The beauty of these things is
 > that they punch a nice flat hole, not like the ones you tended to get
 > with the old Greenlee type punches with a couple of horns on them to
 > hold them in place while you tightened the bolt.
 >
 > Ed
 >
 >