Glen, et. al. --
I have a set of 4 Greenlee punches in my shop that I found a few years back
at a swap meet. For the amount of use I've put them to I don't think I'd
pay retail price. But they occasionally get used where a hole saw won't get
in. Kind of a physical workout if you're trying to go through thicker steel
than 20 gauge. You need access from both sides and a way to drill the pilot
hole. If you're wrenching them you need about 3" clearance for 1-1-1/2" dia
holes on one side for an open end wrench and an extra two inches for a
ratchet and socket.
BTW the key to using a hole saw is to run it slow enough that you don't
overheat the steel cutting teeth. I wouldn't use anything but bimetal on
steel and use some kind of cutting oil whenever I can.
Ed Weldon
----- Original Message -----
From: "Glen Barrett" <speedtimer@beyondbb.com>
To: "Ed Weldon" <23.weldon@comcast.net>; <land-speed@autox.team.net>
Sent: Monday, April 28, 2008 3:26 PM
Subject: Re: [Land-speed] Fw: cutting/grinding tools?
> OK Ed, how's this for an idea. Depending the hole diameter Greenlee hole
> punches used by electricians should do the job as they can be used with a
> wrench to turn the cutting die. They only need a couple of inches to make
a
> very clean round hole in sheet metal, almost any size is available. I just
> did a Google search and you can find them there.
> glen
> ----- Original Message -----
> From: "Ed Weldon" <23.weldon@comcast.net>
> To: <land-speed@autox.team.net>
> Sent: Monday, April 28, 2008 4:15 PM
> Subject: [Land-speed] Fw: cutting/grinding tools?
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