That explanation of machining sintered bronze is probably why Randy is better off doing what he started with, since he can do it at home without specialized equipment.
> From: gbogan...@charter.net > To: phono-l@oldcrank.org > Date: Mon, 28 Jan 2013 17:44:31 -0500 > Subject: Re: [Phono-L] Edison Bearing > > It is important to note the difference between bronze bushings and > sintered bronze bushings. The former require regular lubrication as does > any other plain bearing. But the sintering process produces a material that > is porous and will hold lubricant in its pores which significantly reduces > the need for regular oiling. Here's a description of proper and improper > machining of sintered bronze: > > http://www.lm-tarbell.com/machining_sintered_bronze.htm > > Such bushings have been used for electric motors for decades and are very > dependable. To us old-timers, they were known as "oilite" bearings. Turns > out, that is now the tradename of a company who furnishes such bearings: > > http://www.oilite.com/bearings.asp > > Greg Bogantz > > > > > ----- Original Message ----- > From: "Randy Larson" <ra...@cityprayz.com> > To: "Antique Phonograph List" <phono-l@oldcrank.org> > Sent: Monday, January 28, 2013 12:35 PM > Subject: Re: [Phono-L] Edison Bearing > > > > Ronald > > Thanks so much for your input, I really appreciate it. The only reason I > > used stainless steel is that it would last longer. The oil in the bearing > > would sustain it.Bronze is such a soft metal but did not know about it's > > absorbency. That may possibly reduce any wear on the metal. I will try the > > bronze. Thanks! > > Also, any suggestions on what oil has worked best for you? I am going to > > try some teflon based oil, but they are harder to come by where I live. I > > do have an order for some and hope it will be here in a couple of weeks. > > Thanks again > > Randy > > > > On Mon, Jan 28, 2013 at 10:56 AM, Ron L'Herault <lhera...@bu.edu> wrote: > > > >> So why didn't you use something like sintered bronze for the bearing? > >> It > >> absorbs and holds oil. > >> > >> Ronald L'Herault > >> > >> Lab Supervisor, Biomaterials Division > >> B.U. School of Dental Medicine > >> 801 Albany Street S203 > >> Roxbury, MA 02119 > >> > >> > >> > >> > >> -----Original Message----- > >> From: phono-l-boun...@oldcrank.org [mailto:phono-l-boun...@oldcrank.org] > >> On > >> Behalf Of Randy Larson > >> Sent: Monday, January 28, 2013 11:48 AM > >> To: Antique Phonograph List > >> Subject: [Phono-L] Edison Bearing > >> > >> I want to thank everyone who expressed interest in the Edison bearing. > >> I've > >> received enough request that will keep me busy for several weeks. So I'm > >> sorry I can't make the offer free anymore. > >> One question is why make one in the first place? > >> A collector once said to me years ago; one of the problems with an Edison > >> motor is that there is steel on steel friction with only the oil you can > >> externally place on it. That in itself initiated the wheels spinning. I > >> wondered if I could improve it. > >> This bearing provides a continuous feed of oil to the bearing and reduce > >> the > >> constant need to oil it externally. > >> Maybe it's crazy and won't make a difference. But I'm sending it out to > >> several individuals to test it and see if it is an improvement. > >> Or maybe it's because I'm too lazy to oil the motor as required! > >> In 1963, I received my fathers Brunswick he played as a child. I was > >> thrilled with it and began my enthusiasm for collecting, He would take me > >> all over the city as I scoured for any old unit. In 1964, he paid $60 for > >> my > >> first Edison Standard (of which he only made $75 a week). I was stunned > >> that > >> he would make such a sacrifice for me. > >> What is interesting is that he worked for Alcoa Aluminum. He was an avid > >> inventor and came up with several improvements for the machines he > >> operated. > >> He was even recognized for several awards (unfortunately nothing > >> financially). He passed away in 2011 at the age of 91 He was my best > >> friend, > >> hero and my inspiration. And we both admired Edison! > >> Maybe a long explanation of why, but there it is. > >> Best Regards > >> Randy Larson > >> _______________________________________________ > >> Phono-L mailing list > >> http://phono-l.org > >> > >> _______________________________________________ > >> Phono-L mailing list > >> http://phono-l.org > >> > > _______________________________________________ > > Phono-L mailing list > > http://phono-l.org > > _______________________________________________ > Phono-L mailing list > http://phono-l.org _______________________________________________ Phono-L mailing list http://phono-l.org
