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In the Forum: Analog Playback
In the Thread: Copper Mat on a Micro Seiki Gun Metal Platter
Post Subject: BearingPosted by jam on: 10/31/2017
Wellington,
It is my understanding that lead was used because it'a anti an anti-seize properties. The bearing fit is very tight and I suppose this helped with the lubricants of the period and is not a problem with modern synthetics.
The bearing does not have a spiral grove machined on it's surface, the whole assembly is filled with lubricant .
I have tried oils of different viscosity and found the low viscosity ones work best, there is no play in the bearing at all. If I spin the platter as fast as I can manually and release(no belt) it will spin in excess of six minutes before coming to rest.
I only see the need for high viscosity lubricants for loose fitting bearing. Higher viscosity means more torque required by the motor and the attendant increase vibration, and so on.
The Feickert turntables (inverted bearing) just replaced their bearing lubricant with a lower viscosity one with was an improvement. A great turntable by the way but definitely no Micro-Seiki. I have tried a lot of turntables and the RX-5000 rules and the only turntable I think (That I have heard) is better is the American Sound but that is another story................
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