Linn Bedrok LP12 Plinth Upgrade

watch the video

https://www.youtube.com/watch?v=SqP4eHBSlI4&t=2s

minute 5, the shaft simply drops into the bearing with no resistance

clunk

he removes it, adds a few drops of oil, it simply drops in again

clunk again.

There is no way in the world that that can be considered fine tolerances. and what makes the clunk noise? shouldn't it be zero contact floating on oil?

minute 6, drop the tonearm post in the mount indicates no close fit either.

I guess this thread should be a discussion only including LP12 owners, who also do not own the Bedrock. 

@lewm 

Not at all. Feel free to comment as much as you want. But expect what you say to be challenged occasionally. 

@elliottbnewcombjr  I have seen the video you posted and others that are more complete. The bearing is precise without having to be a tight fit! Remember, the bearing point is what the whole shaft rotates from. The bearing point is diamond hardened. Please do a little more research.

@elliottbnewcombjr

l have to agree totally with your deductions……l think the subject of tolerances in the shaft is critical for turntable stability.

l had a Thorens TD124 and experienced your claims for the very tight fit while ‘seating’ the shaft onto the bearing thrust pad.
My later table and my much loved classic period table of all time, the Logic DM101 Electronic is even closer in machined tolerance than the Thorens. After an oil change of ‘Gold Oil’ Mobil Velocite No.6, (l believe the Linn recommended oil) the time it takes the shaft to settle is about 10 minutes to displace the trapped air. I try to speed the seating process up with intermittent manual revolutions of the platter.

Vertical and horizontal tolerances in the bearing and shaft are just as critical as that found in a well designed tonearm.

l can’t believe there are suggestions made on this thread that the shaft tolerance is not important….that statement has to be plain nonsence! Without such a tight seat the platter shaft would slightly oscillate like a demented flag pole in the wind.