Do Tonearms need servicing


I treated myself to a to. 2nd Hand  SME  309 Tonearm. They have become expensive and rare over the last few months. It is optically in very nice condition and sounds good to my ears. However My estimation it is between 7 and 10 years old. 
I am asking myself whether I should get it serviced. Appreciate your input / sharing your experience.
jorgjean
A simple enough question but the answer doesn't seem to be.

For example there seems to be quite a difference in opinion between running the bearings dry and using something like very light machine oil. 

Then there's the issue of bearing tolerances.

Since virtually every arm maker boasts about the tightness of their tolerances, can anything be done for arms that have been badly handled, as in changing cartridges etc?

One piece arms must be particularly at risk, I guess.

I remember reading how some bearings are said to be fairly robust, but I suspect far too many are quite fragile.

Then there's the question of rewiring. Certain arms seem to be susceptible to tracking issues if the cable is unsuitable, environmentally aged, or even badly fitted. The relationship of the LP12 to its cable is a subject all in itself.

Yes, interesting question, I feel like we might need @best-groove to elucidate a bit further or someone like @atmasphere to come in and help.
Dear @jorgjean : That's a very specific question for a specific tonearm model and must be asked to the designer/manufacturer, to no one else.

What any one including me but the specific manufacturer can tell you has no value at all.

The main issue in a tonearm could be at the bearing and its condition depends more of the owners care of use than time.

Any person that is dedicated to refurbish tonearms always will tell you your tonearm needs " something " because it's his busine$s. Ask the manufacturer. Period. Wiring up-grade is different.

Regards and enjoy the MUSUIC NOT DISTORTIONS,
R.
Unless that vintage tonearm has been run over by a vehicle or used as a hammer I'd leave it alone! Spoken as an owner of several nice vintage arms.
If you are not careful servicing your vintage tonearm, you will soon have a gaggle of baby tonearms to care for.  So use protection.