Ed
I have aircraft hole saws up to 3" dia. They are very expensive and I never
loan them Costs about $25.00 each to have them sharpened. Have different
size mandrills for them as well but good cutting fluid is critical.
Glen
----- Original Message -----
From: "Ed Weldon" <23.weldon@comcast.net>
To: "Glen Barrett" <speedtimer@beyondbb.com>; <land-speed@autox.team.net>
Sent: Monday, April 28, 2008 5:34 PM
Subject: Re: [Land-speed] Fw: cutting/grinding tools?
> 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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