Hutchin air sander leaving swirl marks.

[Matt Melville]

I have had a Hutchin 4500 series sander for a few years now and love it, but a few weeks ago though it started to leave the dreadful pig tails on the wood. I haven't changed the way I sand or the paper I use (3m gold hookit disc). I was hoping anyone on here might have some suggestions on why this might be happening. My air compressor is plenty big enough to run it and I am not pushing down on the sander, I am letting it do the work. Do the bearings ever go bad in these and if so has anyone ever replaced them? Thanks ahead of time.

[Chris Parks]

Do you oil it before use?

[Larry Edgerton]

I use Hutchins sanders in my shop and have not had that problem. As mentioned they do need to be oiled but I am sure you do that. I will be curious to see what you come up with just in case I come up with this situation.

Larry

[J.R. Rutter]

FWIW, the Dynabrade rep told me to oil at the end of the day so that the oil can sit in there and not just get blown through.