BT-30 ER COLLET CHUCK

BT30 Tool Holder rages from ER-11 to ER-40 with varying length.

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 micron upto 100 Length and 0.012 upto 200 Length
All critical tool holder surfaces precision ground
Coolant through capability
The gage length is 70mm,100MM,150MM
The rear thread for the pull stud is M12 X 1.75

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