Handdo 4Pcs BT30-ER16-70L ER Collet Chuck Metric 12 Fit for CNC Tool Holder of CNC Machining Center

steel Model: BT30-ER16-70L Size: Gage length: 70mm, Draw Bar Threads: Metric 12 Precision Manufacturing: The close interaction of the cutting force of the tool on the workpiece with the guide column reduces the resonance and makes the machining accuracy more stable Features: The BT30-ER16-70L Collet Chuck is used in the CNC machine tool of the machining center to connect the machining center joint and lock the cutter head for work