BT50 Tool Holder accepts all ER20 collets
ER20 Collets range from 1 mm to 14 mmThread inside internal stop screwMade from alloy steel hardened to 54 56rcBalanced to G6.3 at 12,000 rpmsConcentricity is less than .005 micron upto 100 Length and 0.012 upto 200 LengthAll critical tool holder surfaces precision groundCoolant through capabilityGage length is 70mm,100MM,150MM,200MMRear thread for pull stud is M16 X 2.0
All holders have capability to become through coolant by simply removing screw in the center by allen key
