Mark,^^^ The bearing and inner platter should be regarded as a set, a couple, they work in tandem together, to replace one without the other is ill advised. Not a myth.
Mark,
For once we agree on something .
If people didn't just drop the inner platters in and lowered them carefully and used the right oil in the first place ???
I have been using a Tranquility (The only aftermarket none Linn bit of kit on my deck) for months now and love what it does.
It's almost sexual watching the way the inner platter lowers itself down into the bearing tube.
Hundreds of degrees? Hardly. The spindle would jam tight. There's too much metal mass in the spindle for it to raise by more than a few degrees at the tip.
Hundreds of degrees? Hardly. The spindle would jam tight. There's too much metal mass in the spindle for it to raise by more than a few degrees at the tip.
Let's see the maths...
I've yet to observe a turntable main bearing housing at anything above ambient room temperature. I'm sure if it was 70% at the contact point that would radiate out and warm the housing. Motors are whole other things, the big old idler decks I like do run very warm.
I have no idea what the tip temperature is but the mass of the rest of the spindle and platter will soak that up and of course the whole assembly is running in an oil bath so that will reduce temps considerably. Either way there is little chance of the whole bearing generating much heat above ambient temperatures. If you were to run it at a much higher rpm and remove the oil then you'd find temperature and wear rate would rise significantly.
The factors that contribute to the bearing running quietly also involve things like how concentrically the tip is located which would increase scrub etc. Probably one of the reasons some manufacturers like to use a ball bearing against a flat spindle surface, potentially a cheap way to do this (if you can correctly locate the ball)
You obviously have know idea what you are talking about.
I'm still intrigued by the oil that has hardened due to heat now we've established that we are talking about 70degF.