Sorry about that, I could have been more specific. A sabot could be employed to fit together parts (needle to needle bar etc) and would avoid the problems of the threaded needle, the delicate nature of fine threads, cross threading.. etc. There's a couple different ways to implement, I'm sure. But there are engineers here with more practical experience that might have already disregarded the idea. It has short comings. For example the vibrations /might /shake loose any sabot no matter how tightly fitted. That's really beyond my competence and experience in fabrication .
-Thatcher [email protected] wrote: > Yes it is. Google "sabot" and go to Wikipedia for detailed > description. Then you can figure out how it might apply to a needle > holder. > Ray > > ----- Original Message ----- From: "Ron L" <[email protected]> > To: "'Antique Phonograph List'" <[email protected]> > Sent: Wednesday, February 13, 2008 4:01 PM > Subject: RE: [Phono-L] threaded needles > > >> Isn't sabot a French word for boot? >> >> Ron L >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On >> Behalf Of Thatcher Graham >> Sent: Wednesday, February 13, 2008 3:17 PM >> To: Antique Phonograph List >> Subject: Re: [Phono-L] threaded needles >> >> >> As an engineer I could not help but to fixate on this "threaded needle >> idea". I agree that threading needles solves the mass issue hence the >> instinctive appeal, but the difficult manufacture is equally >> discouraging. As an alternative, have you considered a sabot? >> >> -Thatcher >> >> >> >> Jon Noring wrote: >>> Greg wrote: >>> >>> >>>> Threading the needle shank and having it screw into the needle >>>> bar is >> an >>>> option. I hadn't considered that before, but it would pretty well >>>> solve >> the >>>> extra mass problem. But it would make the needles pretty involved to >>>> manufacture. I'll keep it in mind. >>>> >>> >>> Yes, it would be involved if all the needles are threaded by hand or >>> in small numbers, especially at the diameter being considered. >>> >>> It is intriguing to consider using a very fine threaded rod, if even >>> manufactured in the desired material(s). One would have to grind and >>> polish to create the tip geometry. >>> >>> Which brings up the idea that if a needle is to be especially >>> manufactured, one could consider tipping it with a different material >>> that can be specially shaped (such as spherical or elliptical with >>> no sharp edges at all. It is my understanding that most damage to >>> grooves is due to a tip which is no longer smooth. Maybe the tip could >>> be made from a material of the same hardness as the "grit" used in >>> shellac discs (is it corundum?) to wear down the needle. >>> >>> Just thinking outside the box... >>> >>> Jon >>> >>> _______________________________________________ >>> Phono-L mailing list >>> http://phono-l.oldcrank.org >>> >> >> >> >> _______________________________________________ >> Phono-L mailing list >> http://phono-l.oldcrank.org >> >> _______________________________________________ >> Phono-L mailing list >> http://phono-l.oldcrank.org >> > > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org
