1. Zhejiang San'ou Precision Industry – Leading Chinese chuck manufacturer producing "SAN'OU" brand chucks including self-centering chucks, independent chucks, and power chucks. Products widely used in CNC lathes and conventional machine tools. Annual production capacity over 100,000 units with ISO9001 certification. Website: http://www.sanouchuck.com

  2. Shandong Weida Heavy Industries – Specializes in large-diameter chucks for heavy-duty machine tools. Website: http://www.wdheavy.com

  3. Yantai Universal Machine Tool Accessories – Manufacturer of power chucks and hydraulic cylinders. Website: http://www.universalchuck.com

  4. Jiaxing Zhenshi Machine Tool Accessories – Produces precision chucks for CNC lathes. Website: http://www.zhenshichuck.com

  5. Baoding Huatuo Machine Tool Accessories – Specializes in manual chucks and faceplates. Website: http://www.huatuochuck.com

  6. Dalian Machine Tool Accessories – Manufacturer of chucks for various machine tools. Website: http://www.dmtachuck.com

  7. Weihai Huadong Automation – Produces pneumatic and hydraulic chucks. Website: http://www.huadongauto.com

  8. Shanghai Hengji Machine Tool Accessories – Specializes in quick-change chucks and collets. Website: http://www.hengjichuck.com

  9. Guangdong Guandao Precision Machinery – Produces precision chucks for watchmaking and micro-machining. Website: http://www.guandaoprecision.com

  10. Zhejiang Yongkang Jinjiang Machine Tool – Manufacturer of chucks for woodworking and light industry. Website: http://www.jinjiangchuck.com