High Precision Milling Holder 40CR Collet Chuck CNC Tool Holder for Lathe Drilling and Milling Machines R8 ER25 7/16 20 Threaded Shaft

Item Type: Milling HolderMaterial: 40CRModel: R8 ER25(7/16-20)R8 threaded shaftDrawbar: 7/16Use: R8 dedicated machineTotal Tightening Accuracy: 0.00Rounding: Body Accuracy: 0.001Carburization Depth: >0.8mmSurface Roughness: >0.8mmStandard Speed: Below 10000rpmSurface Roughness: >0.8mmStandard Speed: Below 10000rpmPackage List：1 x Milling Holder1 x Storage Box

• [INDUSTRIAL GRADE PRECISION] Engineered for professional machining applications, this milling holder delivers exceptional 0.00 tightening accuracy and 0.001 body precision. The ultra-precise ER25 collet system ensures tool concentricity while the hardened 40CR construction maintains these tight tolerances through extended use in demanding workshop environments.
• [HEAVY DUTY CONSTRUCTION] Crafted from premium 40CR alloy steel through specialized tempering and forging processes, this holder achieves structural integrity. The deep carburization treatment (>0.8mm) and precision polishing create a surface hardness that dramatically reduces wear while preventing catastrophic tool breakage during high-speed operations up to 10000rpm.
• [VERSATILE MACHINING SOLUTION] Designed to excel in multiple applications, this R8 compatible holder works seamlessly with lathes, drill presses, and vertical milling machines. The extended reach design solves deep cavity machining challenges while maintaining exceptional rigidity. for both production shops and precision engineering applications.
• [PERFORMANCE ENHANCING DESIGN] Optimized geometry reduces vibration and improves chip evacuation for surface finishes. The efficient design minimizes tool extensions while providing excellent balance at high rotational speeds. Includes convenient storage box for organization and protection of your valuable tooling investment.
• [COMPLETE PROFESSIONAL PACKAGE] Your purchase includes one precision milling holder (R8 ER25 7/16-20 configuration) with a protective storage case. The threaded drawbar connection ensures secure mounting while the hardened collet nut provides reliable clamping force for uninterrupted production runs and consistent machining results.