HARBOR FREIGHT small round column mill to a square column conversion.

First of all I would like to say, I wouldn't recommend this mill for DIY unless you can live with the factory tolerances of the machine, table not flat by .012 had to recut and regrind pretty much every surface on it, some of the critical areas and surfaces of the machine out by as much as .030 in a 4 inch distance. So with that said you would need a full machine shop to recondition the machine and during some testing I found that there was no way to get a very good cut with a 3/8 to 1/2 end mill, side cutting 6061 T6 alum. which is the main reason I am converting to square column. It hasn't been tested yet but I suspect this is the main culprit of the vibration and bad surface finish, may have to make a new spindle also, have not got that far yet. X Y Z Travels have all been added to. IM not to good a writing stuff up but I wanted to share my drill/mill with CNC ZONE click on link to see pics

http://webpages.charter.net/ms61/