So I'm finally getting around to finishing up the sanding and painting of my Tubas (which aside from sand & paint were done back in May!) and I think I managed to burn out the 6" orbital sander that I've had for the last decade. It's making a very strange whirring/grinding noise (at about 3kHz

) and refusing to spin up to full speed. If I leave it alone for a day it works again, but every time it runs for less and less time before acting up. I'm going to crack it open, clean it, and axle grease all the pertinent parts, but something tells me I'll only be delaying the inevitable.
If, in fact, it is dead - what do you guys recommend for a good sander? I've been using the orbital sander thus far just because it's what I have on hand and it's a lot quicker than the 1/4-sheet vibrating palm sander I've got. Do you guys prefer belt sanders or orbital? Are there any brands in particular to look for (or avoid)?
and, if anyone has any tips for cleaning/repairing an orbital sander I'd love to hear it.
Thanks in advance...
Low End Junkie for over 20 years.
4 DR250s
4 Tuba36s @ 30" wide
2 ATs
...and a very serious addiction to the smell of BB sawdust and curing PL.