[TheForge] slitting and drifting help needed

[Bob Willman]

	The slitting chisel length would be 1/2 the circumference of the
finished round hole. I counted both sides of the slit to equal the entire
circumference. Square or rectangular holes should need to be the perimeter
of the finished hole or 1/2 the perimeter for the chisel length.  


Bob Willman
Bowling Green, Ohio
The Eagle's Anvil
WB8NQW

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Dan Tull
Sent: Tuesday, February 14, 2006 4:24 PM
To: Sponsored by ABANA
Subject: Re: [TheForge] slitting and drifting help needed

How about half the circ.?
----- Original Message -----
From: "Bob Willman" <blcksmth at wcnet.org>
To: "'Sponsored by ABANA'" <theforge at mailman.qth.net>
Sent: Tuesday, February 14, 2006 3:47 PM
Subject: RE: [TheForge] slitting and drifting help needed


> I would start with a slit that was almost equal to the circumference
> of the finished hole measured along both sides of the slit added together.
> This should drift out to very close to the diameter hole you need.
>
>
> Bob Willman
> Bowling Green, Ohio
> The Eagle's Anvil
> WB8NQW
>
> -----Original Message-----
> From: theforge-bounces at mailman.qth.net
> [mailto:theforge-bounces at mailman.qth.net] On Behalf Of robert hensarling
> Sent: Monday, February 13, 2006 8:38 PM
> To: theforge
> Subject: [TheForge] slitting and drifting help needed
>
> Guys, is there a reference, or chart maybe, of what size slitting chisel 
> to
> use for a given drifted hole diameter?  In other words, if I want a 
> drifted
> finished hole size to be 1/2", what size of slitting chisel would I use, 
> not
> only for this size, but 3/16th's, 1/4, 3/8th's etc. I'm referring to the
> "canoe" shaped slitting chisel.
> I understand that a slit and drifted hole will increase the overall length
> of a given piece of steel, and a punched and drifted hole will in fact be 
> a
> little less.  Do I have this correct, or am I backwards?
> Thanks for the info!
> Robert Hensarling
> Uvalde, Texas
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