BT40 ER11A Collet chuck-70L,100L,150LTheBT40 Tool Holder accepts all ER11 colletsThe thread inside the internal stop screwMade from alloy steel hardened to 54 56rcBalanced to G6.3 at 12,000 rpmsConcentricity is less than .005 micronsAll critical tool holder surfaces are groundCoolant through capabilityThe gage length is 70mm
The rear thread for the pull stud is M16 X 2.0
All holders can become cool through coolant by simply removing the screw in the centre with an allen key
