RE: [CAD_CAM_EDM_DRO] Re: Making your own Ball nuts

For a low budget solution, how do you think mixing bronze powder with JB
Weld would work? Assuming you can buy small amounts of bronze powder.

Thanks,
JJ

Be Kind, Be Careful, Be Yourself

> -----Original Message-----
> From: Les Watts [mailto:leswatts@...]
> Sent: Friday, October 18, 2002 3:36 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Making your own Ball nuts
>
>
> Yup Tim, something like that.
> Fortunately a little goes a long way.
> And hopefully cheap compared to several
> ballnuts.
>
> I did talk to the Super alloy manager some.
> He said it ought to work pretty well on 2-c acme thread
> forms but their experience was all with ballscrews.
> At least on the acme you don't have any rolling burr
> to remove so that is a plus.
>
> It will be too tight without sufficient mold release so yes
> that is an important step. Any mold release compatible with epoxies
> should work but I would go for a running clearance of 0.0005"
> to 0.001". Has to have room for an oil film and accommodate
> the slight pitch variations in the screw. Seems to me it would
> be good if you could somehow get a thicker mold release coating
> on the top and bottom of the thread as those surfaces do not
> contribute to thrust loading. I also wonder if you could grind
> a rough longitudinal groove in a waste end part of the screw to
> use as a temporary minimal tap to fine adjust the cast nut
> by shaving it slightly if needed.
>
> And I will mention the M word.... Moglice! It is very similar to
> our product. Good stuff. We always try to be a little cheaper
> and provide better customer engineering support. Heh... I
> should say I because ITW (Philly resins) is my client now rather
> than my employer. I don't make anything for selling their goop.
> Just designing their encoders.
>
> With oil or grease lube the material is good to a surface speed
> equivalent to 1000 rpm on a 1" diameter screw. Beyond that
> close fitting polymer bearings can get hot due to their low
> thermal conductivity.
>
> Les
> Leslie Watts
> L M Watts Furniture
> Tiger, Georgia USA
> http://www.alltel.net/~leswatts/wattsfurniturewp.html
> engineering page:
> http://www.alltel.net/~leswatts/shop.html
>
> ----- Original Message -----
> From: "Tim Goldstein" <timg@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Friday, October 18, 2002 3:03 PM
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Making your own Ball nuts
>
>
> > The Philly resin is something like $65 for the small
> container and then
> > another $20 or so for the release spray if I remember
> correctly. If you go
> > with it the release spray is a must as it controls the
> clearance as well
> as
> > acting as a release agent.
> >
> > Tim
> > [Denver, CO]
> >
>
>
>
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>
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