Brief introduction
NT APU Self-fasten Drill Chuck, 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.

Specification:
NT-APU drill chuck handle
Product Type: NT30 / 40/50-APU (see model below)
Material: high quality carburizing alloy steel, black treatment and fine grinding
Taper Shank: Tolerance Level Hardness: HRC 56-58
Carburizing depth: 0.8mm ± 0.2mm
Maximum beating: <0.005mm = 5um
Surface roughness: Ra <0.005 mm
Application: clamping the diameter of 0.5-16mm drill