It has come time to make a permanent repair on my mill head (last discussed here http://www.hobby-machinist.com/showthread.php?t=3949). I have the head disassembled as I make additional enhancements, including the addition of a spindle encoder and a switch-over from variable speed reeves drive (which is worn, no replacement parts available) to a fixed pulley belt drive.
The good news is that the JB weld has held up for over a year. Now I have to clean up the old repair to make room for the new one. I want to either build up the area with brazing rid and machine to size, or machine down, and press on a sleeve. I'd like some advice from the more experienced folks. The "shaft" is only about 50mm long, and 50mm in diameter. If I go with a sleeve, is that something I make myself? What material? Is it just a press fit, or do I braze/solder it on? If I build up the area with braze, how concerned do I need to be about distortion?
Oh yeah, the shaft is cast iron.
Thanks in advance.