Re: [CAD_CAM_EDM_DRO] Ballnut Nut: clarification

Using a 16/16-16 tap for a 5/8" ballnut with the right sized hole
results in a *good* thread and a good fit for a 5/8" ballnut. At least
it did for us.

The 1.137" threads on the 3/4" ballnuts are a different story. We cut
threads for them with a 1-3/16 tap. Yes, that thread is sloppy, but we
lock it with a set screw and it holds the ball nut fine. We, however,
DO NOT use that thread for adjusting backlash as it is too loose to do
that. I think that is what Bill is referring to when he said his thread
failed.

Kim

On Tue, 2003-09-09 at 18:13, Bill Kichman wrote:
> We just went through that exercise....your best bet is to get a local shop
> to chase the threads to fit, as a tapped hole, per Kim Lux's description
> when he did it that way, proved unsatisfactorily sloppy and the threads
> failed to hold the ballnut in place. Your result may vary. My threads are
> nice and tight made up on the lathe.
>
> R. William Kichman, P.E.
> Kichman Engineering Associates
> 103 Old Furnace Road
> Cornwall, PA 17016-0643
> tel/fax 717/270-0714
> ----- Original Message -----
> From: "Tim Goldstein" <timg@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Tuesday, September 09, 2003 2:40 PM
> Subject: RE: [CAD_CAM_EDM_DRO] Ballnut Nut
>
>
> > > -----Original Message-----
> > > Does anyone know if there's anywhere to buy either a tap or a
> > > nut for a 5/8" Ballnut? It is a 15/16-16 thread which is a
> > > little bit of an unusual size. Or is my best option to buy a
> > > flange (at $23 w/o shipping!) and mill it to the right size?
> > >
> > > Thanks,
> > >
> > > --C.S.
> >
> > www.MSCDirect.com item # 74848714 for $56.02 is the tap.
> >
> > Tim
> > [Denver, CO]
> > Beat the Sherline Oct 1 price increase. Order Now!
> >
> > Sherline & Taig products at Deep Discount
> > Mach1 & DeskCNC with credit card ordering
> > www.KTMarketing.com/Sherline
> > e-mail me at Timg @ KTMarketing.com for items not yet listed
> >
> >
> >
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> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
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--
Kim Lux <lux@...>