Re: [CAD_CAM_EDM_DRO] 15/16-16 bore size

Dan,
 
Thanks,  I've tapped a lot of holes but never anything this big before.
 
jack

--- On Mon, 3/2/09, Dan Mauch <dmauch@...> wrote:

From: Dan Mauch <dmauch@...>
Subject: Re: [CAD_CAM_EDM_DRO] 15/16-16 bore size
To: CAD_CAM_EDM_DRO@yahoogroups.com
Date: Monday, March 2, 2009, 4:44 PM






The minor diamter should be .8608 so the 15/16-16 TPI tap should do the job..
..862 should be fine. I have tapped quite a few .
Dan Mauch
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www.seanet.com/ ~dmauch
----- Original Message -----
From: Jack Mc Kie
To: CAD_CAM_EDM_ DRO@yahoogroups. com
Sent: Monday, March 02, 2009 1:18 PM
Subject: [CAD_CAM_EDM_ DRO] 15/16-16 bore size

I'm designing parts for my cnc router to accept Thompson ball nuts with
a 15/16-16 thread. It was obvious to use a 13/16 bore but upon
checking my tap won't start in that size hole. Boring to .862 appears
to allow the tap to start but I am wondering if there is a standard tap
hole size for 15/16-16??? Has anyone else tapped holes for ball nuts?
Thoughts????

Thanks,

Jack

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