Re: copper washers

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

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


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, November 22, 2003 6:38 PM
Subject: Re: copper washers


 > Original poster: Mddeming-at-aol-dot-com
 >
 > When I needed some not too big copper washers, I took a drill press to a
 > roll of copper pennies wrapped with electrical tape, wedged into a pipe
 > nipple that was screwed into a floor flange that was clamped to the drill
 > table. This was done pre-1980, when gov't copper was still mostly copper.
 > I'm not sure what new pennies are made of.

zinc, with copper plating.
However, dimes and quarters are mostly copper.

 > For larger washers, try sheet copper tacked to a piece of plywood. Drill
 > the center holes with a regular drill then cut the outsides with a hole
 > saw, cookie-cutter style. This will eventually kill the hole saw, but you
 > can get many cuts before that.

Brass grommets may be a good source..

Or a chassis punch could cut nice disks out of copper sheeting (hammer might
be faster than the draw bolt)

 > Most commercial copper washers I've seen are VERY thin.
 >
 > Hope this helps,
 >
 > Matt D.
 >
 >
 >
 >