Doozer, it is a 612. I saw your older post about how you redid your machine, yep another question. You said you went through your spindle explaining that it wasn't that difficult. One of the posts I read on the original post, this guy went on about how the average Joe can't do it how at one place he worked the failure rate of spindles was about 80 or 90 percent. I find this hard to believe, if your clean and careful shouldn't be a big deal. Did you notice the high spot marks he was refering to on yours, and is there anyway to tell what type of bearings it might have from the outside? Any direction would be greatly appreciated. Any chance of just repacking the old bearings if they still look good?