Subject: Re: Punch for Making 1" disks from thin sheet

From: [email-masked] (Scott Logan)
Date: Wed, 04 Dec 1996 13:04:13 GMT

On 4 Dec 1996 05:11:39 GMT, [email-masked] wrote:

>Those punches come in two pieces, with one side tapped and a 
>clearance hole in the other, if memory serves. A punch and a die.
>
>Why not attach the 'die' (clearance hole) to the ram of an arbor 
>press and the 'punch' (tapped side) to a metal plate fastened to the 
>base of the press.
>
>Line them up carefully and 'press'. No thru-screw hole, ergo a clean 
>disk (?) It might, however, get a little 'curly' from the process and 
>require a bit of flattening out.
>
>No arbor press? A machinist's vise, with *two* mounting plates, would 
>probably work as well, and might even have less of an misalignment 
>problem.

Nope, won't work if you want a clean disk.  The "punch" half of these
are v shaped.  The slug will come out sort of bent.  See below:

Side view of Greenlee punch

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Apologies for REALLY bad ascii drawing

Scott Logan
[email-masked]
www.loganact.com