Er8 Precision Spring Collet Hole Diameter 1mm to 6mm, Spring Collet Holder 0.008 AA for CNC Engraving Machine 1pc(6mm)

Function: ER8 collet design allows coolant to pass through for improved tool life and machining efficiency. Features: ER8 collet has high clamping force, wide clamping range and good accuracy, widely used in boring, milling, drilling, tapping, grinding engraving and other machining Material: Steel 42CrMnTi Known for its elasticity, which makes it wonderful for use in the manufacture of springs and other parts that are subjected to high levels of stress and elasticity. Design: The angled slots increasing rigidity, ensures tight clamping force, keeps from dust and iron filings from entering, thereby averting the accuracy of the chuck being affected. Size refers to hole diameter