Dd does not come with the hex key needed to replace the bearings. Otherwise it looks good, haven't used it yet. I wanted to cut a 3/8 tongue with it, had to measure with bearings and change bearings until I found 3/8. The sets are assembled at the factory and the bearings fit snugly onto the shaft, holding it in BEARING NOT ON THE CUTTER. It was very difficult to remove them from this chute for storage and I sanded the chute then oiled it to put them back in the tool rack. The bearing fit on the burner itself is fine. Addendum: I've used the cutter now and found it works like a dream. Cut a 3/8 3/4 deep x 2x12 tongue and groove in two passes around the perimeter of a 51 inch box.