Information: Product model:bt-er Chuck taper:jis mas 403(taper7:24) Material:40cr or 20crmnti Maximum rotating speed:25000rpm Runout (precision): 0.005 Suitable pull stud:bt30 bt40 bt50;bt30 bt40(high speed type) Spindle anastomosis angle:30/45/90 Hardness:harden of carburizing(52hrc)conventional treatment(44-48)hrc The products contains more TYPE and Our company supports customer customization