I tried making sintered bronze bearings when I started machining, maybe 35 years ago now. Possibly because of less-than-adequate machining technique, I found that sintered bronze produced greater friction on the mandrel shaft than did plain brass. I consequently continue to use brass and have the ritual of oiling to contend with, but do that happily in exchange for a mandrel which rotates with less effort, important when motors have lost some of their "oomph" due to worn gear shaft pinions, gear teeth and the like. I may have thought at the time that oiling the mandrel shaft was part of the cachet of acoustic phonograph technology. I would enjoy hearing if others with better technique have a better experience with sintered bronze than I did.
Regards, Don Mayer > 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 _______________________________________________ Phono-L mailing list http://phono-l.org
