Dave Hoatson Posted November 4, 2022 Share Posted November 4, 2022 (edited) While working on a set of three R&M ceiling fans for a Baltimore restaurant, the spacing of the thrust bearing balls caught my attention. At first, it looked like there was a manufacturing defect, as the balls were not spaced consistently. And, the wear patterns on the outer races were rather wide, making me think that the bearing shifted around in use. But, now I see: the balls are positioned in a spiral pattern. This spreads the wear out over a much larger area, maybe pulls the grease into the bearing (yes, grease, a common thing with R&M’s), and maybe even makes the bearing run quieter. Edited November 4, 2022 by Dave Hoatson 3 Quote Link to comment Share on other sites More sharing options...
Jim Kovar Posted November 6, 2022 Share Posted November 6, 2022 (edited) On 11/4/2022 at 10:39 AM, Dave Hoatson said: ...positioned in a spiral pattern. Maybe... an idea fromPaul Gottlieb Nipkow? Edited November 6, 2022 by Jim Kovar 1 Quote Link to comment Share on other sites More sharing options...
Levi Mevis Posted December 14, 2022 Share Posted December 14, 2022 On 11/6/2022 at 6:58 AM, Jim Kovar said: Maybe... an idea fromPaul Gottlieb Nipkow? Early Mechanical TV Reference? Hmm, maybe if the Fan dates to the 1920s or 1930s. 1 Quote Link to comment Share on other sites More sharing options...
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