This is a state-patent product,with indepengdent intellectual property. This chuck is internally installed with powercylinder.The chuck carries out clamping and loosing actions by taking in air from side without need of bracing structure. Central via hole can be passed with long axis bar material.Therefore, it is suitable for use together with drill,milling machine and processing center etc. equipments Performance Parameters(Inspected by State Authority Institution) DimensionsSpecificationsDdLL1L2HH1hpBK160KL1723023820281551191920BK200KL210402902028158.5122.51925BK250KL2508034020281731271930BK320KL32512041520282131522232