Hi Chris,
You can place a few drops of oil around the top of the Bearing.
However to be very honest I am not sure how much of it will penetrate down the Bearing shaft as the
extremely closely honed fitting between the shaft and the vacuum oil filled Syntered-Phosphor-Bronze
insert is only a few microns. (1 micron = 0.0000001")
The Phos Bronz insert actually carries all the oil required.
Some of the earlier users have been using their Bearing for more than 6 years, I have been using mine since I first made it.
If I can take this opportunity to explain:
Sadly many people cannot understand that it is the closeness of fit between the shaft and it's "vertical" support
which determines how well it performs. The end of the shaft could sit on the Statue of Liberty for all the difference it would make!.
What the end of the shaft is supported by has little effect on performance as the platter cannot jump up and down
as it rotates on such a small support area. Think about it!!!!
What does matter is the flopping about of the shaft from side to side, pivoting on it's end support as the
shaft rotates. Which occurs when the shaft fit is less than tight and smooth as is the case with the standard bearing.
consider this: if the top of the shaft wobbles by as little as 1/10 thousandth of an inch; how much does the outer
surface of the 12" dia. platter wobble up and down by????? the math is relatively simple!
Also harmonics as the record is "played" will contribute to this movement especially with the standard platter which is "bell shaped"
This is why I constantly state that messing about with the standard bearing does nothing to increase it's engineering performance
in regard to it's suitability to support an audio platter.
I am sorry but what I state are merely facts of engineering physics.
Thus endeth the lesson.