BT-40 ER COLLET CHUCK

BT40 Tool Holder accepts all ER11-ER40 collets
The thread inside internal stop screw
Made from alloy steel hardened to 54 – 56rc
Balanced to G6.3 at 12,000 rpms
Concentricity is less than .005 microns
All critical tool holder surfaces precision ground
Coolant through capability
The gage length is 70mm - 300mm select as per need

The rear thread for the pull stud is M16 X 2.0

All holders have the capability to become through coolant by simply removing the screw in the center with allen key