Taper Shank: Tolerance Grade AT3
Heat Treatment Hardness: HRC50-52
Product Material: 42CrMo
Main Body Accuracy: 0.008mm
Product Advantages: Vacuum heat treatment, uniform quenching for high hardness, and good seismic resistance. The taper of the tool holder is ≤ AT3, tested using standard gauges from Germany’s Diebold, ensuring accurate and stable precision positioning. The high-precision CNC integral drill chuck features high hardness, three-jaw hardened and quenched treatment, full inspection of the product, bright appearance, stable and firm clamping of the drill bit, and minimal runout, making machines more reliable.