Firstly, welcome to The Garage Journal and the Craftsman Drill Press thread!
Secondly, I didn't realize you had attached a link to a photo until I started a reply. Imgur photos typically do not show up for others unless you remove the "s" from "https".
[IMG]https://i.imgur.com/0vEcbIk.jpg[/IMG]
[IMG]http://i.imgur.com/0vEcbIk.jpg[/IMG]
Thirdly, my comments are interspersed below.
Froomja said:
Recently purchased a 103.21300 for a decent price, and this thread was a HUGE help in my decision making process, legitimately studied all your links for about 6 hours the night before I went to check out the unit. Externally, it is in great shape, minimal surface rust, no cracks, and not a an ungodly amount of grime. It started up and ran with minimal noise, and only a small bit of run-out; which I figured was caused by the comically small belt the previous owner had thrown on it.
Any spinning part can have runout. If you are referring to runout at the bit, the pulley/shaft should have very little effect. The spindle, spindle bushings/bearings or chuck are usually the primary cause.
However it seems to have done a number on the pulley shaft. It is very badly galled, to the point I had to pop it out of the bushing with a dowel and a mallet (fortunately it does not look like it damaged the brass bushing). Is the spindle shaft salvageable at all, or should it be binned?
It looks to me that the shaft is still usable, but then I don't see the entire shaft. That set screw witness mark is very high on the shaft. That tells me the shaft was not fully seated into the pulley.
How loose is it in the pulley?
What are the ID and OD dimensions of the bushing?
What is the OD of the shaft?
If it is salvageable is it something that can be done with sanding/filing and elbow grease as I do not have access to a lathe. If it is scrap do you have any recommendations on a replacement?
I would just smooth the high spots on the portion of the shaft that is inserted into the pulley. I might also file two new flats on the opposite side for the set screws if that portion of the shaft is out-of-round.
I also want to thank you for this making and continually updating this massive repository of images and knowledge.
Lastly, thanks for your comments! This thread is a group effort and your experiences and participation will be helpful to someone else in the future.