APU Drill Chucks / Integral Shank Size

Features • AT3 Class Taper Accuracy • Balanced to 15000 RPM G6.3 & 25000 RPM at G2.5 • Carbon depth: 0.8mm +-0.2mm • Surface Roughness: Ra<0.005mm • Accuracy: 5” Micron or 0.0001” TIR or better • Hardness: HRC 56-58