Porter Cable 903373 Belt - Random Orbit

It is the needed part, works right, got to me quickly.

Restored my old sander to work like new.

What an easy fix, now my sander doesnt act like a grinder anymore, easy to install. Worth the money

Always a gamble restoring a 20 year old tool. Always a gamble purchasing repair parts that could have been laying around a hot warehouse or because of their age dry rotted and useless. Happily that was NOT the case with this. The random orbit function of my 333 porter cable sander stopped working. Taking it apart I found an old broken belt. FYI for those contemplating something similar. If you are going thru the motions, just get another Velcro sanding pad while youre at it and thank me later. Also check to see if the pulley spins easily (photo); mine was gummed up with sanding residue and wouldnt turn which is what caused my belt to burn up. (NOTE IT IS LEFT HAND THREAD- TURN TO THE RIGHT TO LOOSEN!!!). Otherwise your will strip out the cast aluminum housing. Put a dab of Dry Lube like Teflon or Graphite (not petroleum based) on the screw and bearing of this pulley. Restoration projects like rarely work out for me but this is a good, relatively old school random orbit with some weight and motion to it and was worth the chance. It is ALIVE now! Yay!

As described

Perfect replacement for the original and fairly easy to install. Works as if the sander was new.

I replaced the belt, but sander still does not oscillate correctly. It does not spin until pressure is applied.

This belt is a factory replacement and seems to be made of better material than the one that came with it.

Fit my great grandpas 20 year old router like a glove. Its nice to have it working properly again!

Great fit but do not try to roll on to the spindles. Instead, stretch straight out over the spindles. I found it was the only way to get the belt on without popping off when putting this disk back in place.