Re: Hole punches

["Merlyn Plotz" <MERLYNP@TC-MANKATO.SCM.TEC.MN.US>]

> Date:          Thu, 07 Mar 1996 07:33:23 GMT
> From:          Phil@sievers.com (Phil Payne)
> Reply-to:      Phil@sievers.com
> To:            quattro@coimbra.ans.net
> Subject:       Hole punches

> In message <16422BE442B@agcom.tamu.edu> "Al Powell" writes:
> 
> [snip]
> 
> > I remember that in the Ag Engineering machine shop, they had some two-
> > piece dies to make holes through sheet metal.  You drilled a small 
> > hole for a bolt connecting the two pieces, which were round cup-
> > spaned dies.  The smaller fit inside the cavity of the other, and had 
> > cutting edges.  The basic technique was to drill a small hole 
> > through the metal for the bolt, connect the dies with the bolt, then 
> > tighten the bolt, and the smaller die but thru the sheet metal while 
> > being braced against the larger die on the opposite side of the 
> > metal.  No warping, no slipping.
> > 
> > ASCII art attempt:           __________
> >                              |        |   Large die
> >                              |        |   
> >                               |______|     Small die
> > 
> > 
> > Anyone know what those dies are called?
> 
> I call mine a hole punch.  They were indispensible in amateur radio shops back 
> in valve (tube) days, for punching holes in radio chassis.  "The place to go" 
> to buy a set ten to fifteen years ago would have been an amateur radio 
> supplier. Perhaps a friendly ham near you still has a set?  
> 
****
The Mfg of these is GREENLEE. In the electronics business,
the were known as chassis punches. You may find some
sizes of these at an electrical contracter's supply house.
Hang onto your hat before you ask the price!

Merlyn
********************************
Merlynp@tc-mankato.scm.tec.mn.us
South Central technical College
Ph. (507)389-7252
FAX (507)388-9951
********************************