Milling Cutter Holder 40CR Collet Chuck Tool Holder for CNC Milling Lathe Drilling Machine, High Precision Spring Collet Chuck with Hardened Surface for Deep Machining

Item Type: Milling Cutter 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 Cutter Holder1 x Storage Box

• High Precision Design: This milling cutter holder delivers exceptional accuracy thanks to its tight-fit collet chuck that securely grips drill bits and cutting tools, minimizing runout during high-speed CNC operations and ensuring consistent, clean cuts every time.
• Hardened & Polished Surface: The collet chuck tool holder undergoes precision polishing and heat hardening treatment, which boosts structural stability, prevents carbide shaft breakage, and allows for higher feed rates and deeper cuts without compromising performance.
• Versatile Machine Compatibility: Designed for wide application, this CNC milling tool holder works seamlessly with lathes, drilling machines, and milling machines, making it ideal for machinists, metalworkers, and DIY enthusiasts tackling deep cavity or extended-reach projects.
• Durable 40CR Forged Construction: Made from high-grade 40CR alloy steel and repeatedly tempered through forging, this milling cutter holder offers superior hardness and long-term dimensional stability, resisting wear even under heavy-duty industrial machining conditions.
• Optimized for Efficiency: Featuring a straight extension handle design that reduces the need for extra adapters, this spring collet chuck holder streamlines tool setup, enhances rigidity during operation, and improves overall workflow in professional and hobbyist workshops alike.