I've had some time over the last few days to spend a little more time w/ the 645. First off was, is, and shall be for a while - cleaning. I mean, at least below the saddle, this thing clearly hasn't seen a rag since, well, possibly when it was made. Step one was a scraper. I'd say that's a good 1/16" thick layer of yuck.
After some scraping, shop vac'ing, and Goof-Off'ing (not to be confused with goofing off), I got it a bit more presentable.
Obviously not done, but ran out of paper towels!
After that, I started poking around a bit more. The head nod seems to work swell - I took it over to 15-20* in each direction and it was no problem. The head tilt was great in one direction, but seemed a bit wonky in the other. I'll have to play with that a bit more.
Which brings up my next question - how do you adjust the ram travel fore/aft and the ram rotation about the turret? The top looks like this:
I assumed I needed to loosen the two nuts near the front and back, and then twist the shaft that sticks out towards the back of the pic. But with the two nuts loose, the shaft didn't want to turn. I loosened that 3rd nut (under the power cable in the pic) but that didn't make any difference, and the stud it was on seemed to turn as well. I was also expecting to find a pair of corresponding nuts on the other side of the ram, but they weren't there. I can see the chain on the underside of the ram, so I know there's something to turn to move it in/out.
To rotate the ram on the turret I assume I need to loosen all 4 bolts on the underside of the top of the turret (you can see the indent for one in the above pic), but then is rotating a manual operation? Or is that the shaft I see towards the back in the above pic?
Here is the collection of stuff that came with the mill (not including a heavy duty but very beat up drill vise).
So there's a bunch of drill chucks, more chuck keys than I'll ever use in a lifetime, a set of collets (1/8-5/8 in 1/8 inc), a couple of T-nuts that were holding the vise, and then the stuff on the right. Okay, the one is for mounting a chuck into a Morse taper, but the two on the far right I'm clueless on. The 2nd from right appears to be just a big as f*** drill bit for boring, or maybe it's for threading said enormous holes? Really no idea, but I don't see me using that. What is it mounted in though? And then the thing on the far right, no idea. I can turn the lower "bowl" part maybe 45* separate from the top part, but that's it. Doesn't obviously come apart, or loosen it's grip on anything.
Finally, is a drawbar really just as simple as a threaded rod? I'm reasonably certain this particular one was not stock! The dark part directly under the nut is threaded, is that what the real drawbar is supposed to thread to?