I have had a 50mm facemill with a 32mm Weldon skank , that I have nothing to hold it with , turned it down to MT3 to fit my mill , this is tough stuff so small cuts and I had to screwcut the thread for a extention to meet the drawbar , turned down a 1/2" UNF bolt drilled and taped 10mm for the drawbar ,tested it on some hot roled mild steel not the best finish but it shifts metal quickly .