Ehhhh, I think they're a little loud, mikld. Especially if you have it up on a bench, on a hard surface. When mine is in operation, I set it on the basement floor, which is padded by those Harbor Freight jigsaw floor mats. I can still here it on the ground floor, if the rest of the house is quiet--low background noise.

If I leave it up on the bench, it's a lot more noticeable.

Noise is one of the things that keeps me in vibratory tumbling as opposed to a roller with SS pins, which I figure would drive my dogs nuts.