Re: [CAD_CAM_EDM_DRO] Acme screws and pre-load nuts was:Re:Re:greetings

Does any one have a url for KERK.






ballendo@... wrote:

>
>
> Alvaro Fogassa wrote:
> >The preload nuts made by BSA does't wear very fast becouse it's made
> >of delrin(acetal) and it conforms to the lead error,The only one
> >that could fit the grizzly would be the 3/8" with a maximum load of
> >25lbs for backlash free.As you increase the load the nut backdrives
> >and backlash is there.
> >It would be very easy to excede the 25lbs load on the grizzly
> >because of friction.
>
> Hello all,
>
> I want to mention that the BS&A cam nut is A market RESPONSE to the
> nuts invented by KERK. The kerk patent uses a torsionally loaded
> differential screw to self adjust for wear. (similar to the
> Bridgeport screw Jon Elson described in an earlier post, but SELF-
> adjusting)And patented it. So BS&A came up with the cam.
>
> IMO, the Kerk product is much better. I had to use the BS&A nuts when
> the popularity of the kerk nuts outstripped the supply(when they were
> first introduced). The BS&A nuts work fine as long as they are used
> in the range they are designed for.
>
> Hope this helps.
>
> Ballendo
>
> P.S. Does anyone know how to disable the "special" windows keys on my
> keyboard(using win 98). I very often hit one of these keys near the
> end of a long answer and it trashes my work!!! This post was typed
> twice. Don't know if I can use an earlier keyboard? Would prefer to
> disable. Failing this, does anyone know where it may be sending the
> deleted typing? I've looked in the obvious(temps)folders. I miss my
> amiga(s)!
>
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