[Steam-engine] pipe threads Huber

[steve hall]

I had several end caps cast for my old 12HP Huber. A local machine shop 
mounted them in a lathe, bored them and threaded them using the lathe. They 
worked great. Steve

>From: "Andre' Blanchard" <andre at usermail.com>
>Reply-To: Steam-engine mailing list 
><steam-engine at lists.stationary-engine.com>
>To: Steam-engine mailing list <steam-engine at lists.stationary-engine.com>
>Subject: Re: [Steam-engine] pipe threads
>Date: Fri, 05 Aug 2005 16:15:59 -0500
>
>At 02:48 PM 8/5/2005, you wrote:
>>I'm a novice when it comes to pipe threads so i need a
>>little help.  The Huber has a "shock absorber"
>>aparatus connecting the bull gear to the rear wheel.
>>see it here http://groups.msn.com/Racerpics/huber.msnw
>>  The engine uses 10 shocks and I was missing a couple.
>>  I have had castings made of the caps on the ends of
>>the pipe nipple.  I need to bore them to size and put
>>2" pipe threads in them.  I think that I can handle
>>the boring but I'm unsure about the threads.
>>Threading these caps should be similar to threading a
>>standard pipe cap.  Will a standard pipe tap work?
>>I'm afraid that the tap will bottom out before it cuts
>>enough threads.  Is there such a thing as a bottoming
>>tap for pipe threads?
>>
>>Andy Glines
>>Evansville, IN
>>
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>
>I have ground the end off pipe taps to do such things but I have never 
>needed to do it on a tap bigger then 1/2.  Cheapest 2" pipe tap I could 
>find was about $95.00 for an import and $121.00 for a USA brand.
>http://www1.mscdirect.com/CGI/NNPDFF?PMPAGE=299
>
>They do make what they call short projection taps for things like what you 
>are talking about, they are, of course more money.
>http://www1.mscdirect.com/CGI/NNPDFF?PMPAGE=301
>
>Are you sure the threads are tapered?  I guess if you have had some cast 
>you have looked them over fairly close.
>
>Any female tapered pipe threads we do at work larger then 3/4" we usually 
>end up single point milling in a CNC, but then they are usually in some 
>nasty block of stainless.
>
>
>__________
>Andre' B.  Clear Lake, Wi.
>
>
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