Collet Chuck BT30 ER11 70mm .0003 Inch

Product DescriptionUltra-High Precision & Runout ControlConcentricity: Manufactured to ultra-tight tolerances with a Total Indicated Runout (T.I.R.) of ≤5 microns (0.0002″) measured at the collet nose, ensuring superior surface finish and dimensional accuracy.Taper Accuracy: The BT taper is precision-ground to AT3 Grade or higher, guaranteeing maximum contact with the spindle interface for enhanced rigidity and repeatability.Superior Gripping ForceOptimized for High-Speed Machining (HSM)Dynamic Balance: Standard holders are  balanced to G2.5 for 20000-25000 RPMStability: The holder’s material properties offer excellent vibration-dampening characteristics, protecting spindle bearings and significantly extending cutting tool life.Industrial-Grade DurabilityMaterial Composition: Crafted from high-strength alloy steel (e.g., 20CrMnTi or equivalent).Heat Treatment: Case-hardened to 52±2 HRC (Rockwell Hardness), providing a tough core with a wear-resistant surface to withstand demanding machining environments.Surface Finish: Treated with a corrosion-resistant coating (Black Oxide or Nickel Plating) to protect against rust and coolant-induced wear.