■Specificity:
☆Mounted directly with the machine spindle nose and with nice rigidity and high accuracy.
☆The chuck mounting types are classified as form A1、A2、C、D.The connecting dimensions conform to GB/T5900.1－GB/T5900.3（ISO702）standards.
☆The structure types of jaws are classified as one-piece jaws ,two-piece jaws for form A 、form C、form D and form E.
☆The body materials are classified as gray case iron（K11口/口）,nodular cast iron（K11口/口（GT）） and steel（K11口/口（G））, the body of nodular cast iron and steel is suitable for higher rotation-speed.
