[TheForge] Tap & Di

[Jerry Smith]

If you break a tap off, put the whole thing in the freezer. The broken tap will shrink away from what ever you have tapped. If you don't believe me, try it.
 
Jerry

--- On Mon, 12/15/08, David E. Smucker <davesmucker at hotmail.com> wrote:

From: David E. Smucker <davesmucker at hotmail.com>
Subject: Re: [TheForge] Tap & Di
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
Date: Monday, December 15, 2008, 5:16 PM



I didn't mention it but the Irwin -- Hanson set I noted below are high-speed steel.  I too favor high-speed steel over carbide for taps and dies.
 
Dave




From: Marc Godbout 
Sent: Monday, December 15, 2008 3:11 PM
To: Blacksmithing List Sponsored by ABANA 
Subject: Re: [TheForge] Tap & Di

For the occasional hacker like myself, I like the high-speed steel taps, instead of the carbide ones. I believe they dull quicker, but don't break as often.

--Marc



On Mon, Dec 15, 2008 at 2:30 PM, David E. Smucker <davesmucker at hotmail.com> wrote:



I recently purchase a set, made by Irwin -- Hanson, made in USA, which seem to be similar in quality to Greenfield.  The dies are hex shape.  I think I got it on sale from MSC.  I would not worry about "new parts" provided the dies are standard shape, either hex or round.  You can buy one off replacements from most machine tool supply houses that will fit your handles.  As to the taps, almost all replacement taps will work and are standard square drive. 
 
The best way to keep from breaking taps is to make sure they are always started straight.  And that they are sharp.  A small starting block with a right angle clearance hole the size of the tap is a real help.  If a tap is dull, throw it out or use the steel for something else, much cheaper to buy a new tap than try to remove a broken one. (We all have broken taps, unless we never tap any holes.)
 
Dave Smucker




From: Peter Hirst 

I am looking for a good tap & die set for the new shop. MOst of my applications are SAE between 3/16 and 5/8" or so, with some NP 1/4 and 1/8 and the oddpball NPT 1/8 27 used for lamp parts.  I would really like a new old stock Vermont or Greenfirld set, but have been advised against anything I can't easily get new parts for.
 






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