SK40 Tool Holder accepts all ER20 collets
ER20 Collets range from 1 mm to 14 mmThread inside the internal stop screwMade from alloy steel hardened to 54 56rcBalanced to G6.3 at 12,000 rpmsConcentricity is less than .005 micron up to 100 Length and 0.012 up to 200 Length.All critical tool holder surfaces are precision-groundCoolant through capabilityGage length is 70mm,100mm,150mm,200mmRear thread for pull stud is M16 X 2.0
All holders can be cooled by simply removing the screw in the centre with an Allen key.
