Rega planar 3 bearing and oil


I recently reoiled my rega planar 3 bearing. It had oil in it, and on the shaft of the subplatter, and the turntable had no obvious problems, but I figured it was probably due for it's 3000 mile change, and besides, I like to tinker !
I removed the ball, inspected and thoroughly cleaned all surfaces using isopropyl alcohol, and then added a few drops of castrol hypoid gear oil (as recommended by rega) and checked that the new oil was drawn to the very top of the subplatter shaft.

To my amazement this has resulted in a considerable improvement in the sound of the turntable. Gone is any hint of glassiness or sibilance in the high frequencies, that used to make the deck sound very very similar to my CD player. The sound is just as detailed but beautifully smooth. I wasn't expecting anything like this ... but for $4 of oil (and I have quite a bit left over :-)) I'm very happy.

So any brave owners with old rega decks try changing the oil ... you might be very pleasantly surprised.

On a related issue I noticed that some high-end decks come with ceramic or saphire bearings, of very high tolerance. I have found that www.bocabearings.com can supply such bearings for around $4. Can anyone think of a negative impact of trying a high-precision bearing in the Rega ? Should I stick with steel ? There is an aftermarket subplatter for sale at music direct that uses a ruby bearing.
seandtaylor99

Showing 5 responses by seandtaylor99

Thanks Stefan. If you don't want to remove the bearing housing from the plinth then a small magnetic screwdriver can be used to remove the bearing from the well.
For $4 I'll take a punt on a silicon nitride grade 5 bearing and see if it makes any difference. It's only a small part of the bearing assembly, but the fun of trying is worth the $4 admission. If I hear any difference I'll post back.
Pepboys, autozone, some grocery store etc etc

Hypoid gear oil (80w) is put into manual transmissions. I got the information to use hypoid gear oil from a former Rega dealer on another forum, and it does make perfect sense.

A manual transmission is hardened steel with brass synchro rings, and must be lubricated against high pressure metal-metal contact. Gear oil is a high-viscosity oil loaded with sulphur (and probably other stuff) to give it good lubrication properties under high loads. The rega bearing is a deep brass hole into which a steel spindle is inserted, riding on a small steel ballbearing.

The problem is that you have to buy a quart of the stuff, and think you probably only require 2-3 drops. Try not to miss the bearing well as it stinks and it's tricky to clean off the plinth. A dropper would be handy.

Rega dealers will also sell oil for reasonable money, but I have no reason to be anywhere near one, so I just picked up the castrol on my regular visit to the auto store.
Jason,
Boca bearings sells them. http://www.bocabearings.com/

I'm not sure if the silicon nitride bearing made much improvement. It certainly did not make the magnitude of difference that changing the oil to Mobil SHC634 did (that's a huge upgrade). I'd recommend trying to get hold of a quart of SHC634 and relube the existing bearing before trying a ceramic ball.
The bearing is 3/16 inch.

From my confirmation email from Boca bearings :

3/16IN-C Si3N4 GR.5 BALLS (Ea.) $3.95

I've been using this bearing for about a year now and played probably several hundred hours on it. It seems fine. Like I mentioned above, not a startling improvement from the steel bearing it replaced (unlike the SHC634 oil).