ER8 ER8-M M Type Nut for CNC Milling Machine Engraving Lathe Tool ER 8 Spring Collet Nut

1.Each boring head with three different sizes insert holders for different boring ranges.
2.Standard insert holder for inserts with lead angle 3°，for a better working performance during bling blind hole boring.
3.Insert holder can be mounted in opposite direction to back boring.
4.Better connection between insert holder and tool body provides higher tool prigidty and working performance.
5.AII DCK-CBH fine boring tools are with internal cooling design,which increases the surface finish and inserts tool life