High Quality NT40-APU13 Intergrated Drill Chucks

High quality  nt40-apu13 intergrated drill chucks nt apu self-fasten drill chuck arbor, application range: clip diameter: 0.5-16mm bit .mechanical spindle and cutting tools and other accessories.high precision nt shank tool holder ,balanced g6.3 or g2.5 for choose. Nt tool holders for mechanical spindle and cutting tool and other accessory tool connection. Is a simple, popular spindle shank connection standard, mainly nt30 nt40 nt50.. Etc.. Mold industry, and high-speed engraving machine, used more. Specification: materail: 20crmntihardness: hrc 56-58max run out: