SK APU keyless drill chuck tool holder

High precision sk30 40 50 APU keyless drill chuck tool holder , Material: Allyed case hardened steel, black-finished and precisely grinde.Application range: clip diameter: 0.5-16mm bit .Mechanical spindle and cutting tools and other accessories.High Precision SK shank Tool Holder ,balanced G6.3 or G2.5 For choose.SK Tool Holders for mechanical spindle and cutting tool and other accessory tool connection. Is a simple, popular spindle shank connection standard, mainly SK30 SK40 SK50... Etc.. Mold industry, and high-speed engraving machine, used more.

SK APU Drill Chuck Specification:
Material: Allyed case hardened steel, black-finished and precisely grinded.
Taper tolerance: Hardness : HRC 52-58
Carbon depth: 08mm±0.2mm
Max run out : <0.003mm
Suface Roughness: Ra<0.005mm
Cooling AD+B type can be made by request
When order , pls specify balancing G6.3/G2.5
Shank body standard: din69871 CNC turning tool holder