
ZHEJIANG SANOU MACHINERY LIMITED COMPANY manufactures drill chucks, precision chucks and hydraulic chuck systems, plus machine tool accessories. The company focuses on high-precision, high-clamping-force solutions supported by strong IP and digitalized quality management.
ZHEJIANG SANOU MACHINERY LIMITED COMPANY is a manufacturer of drill chucks and machine tool workholding and accessory solutions, covering key type and keyless drill chucks, self-lock and self-tighten systems, as well as chucks and hydraulic cylinders for CNC equipment.
Its portfolio spans a broad range of drill chuck and chuck series, designed for applications from electric and pneumatic tools to CNC machine tools, machining centers, coordinate boring machines and milling machines. The company also supports OEM and special-structure development to meet customer-specific requirements.
To drive consistent performance at scale, the factory integrates structured production and quality practices, including ERP-based management, SPC process control and TQM-oriented quality improvement. It is also positioned as a technology-focused enterprise, with extensive authorized patents related to drill chucks and lathe chucks.

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The company develops and manufactures products to customer requirements, including special structures and OEM-oriented solutions across drill chuck and chuck systems.
The company holds extensive authorized patents related to drill chucks and lathe chucks, including 482 China patents, 7 U.S. patents and 5 Germany patents. Earlier disclosures also note 365 patents by 1 January 2010, including 2 Germany patents and 4 U.S. patents.
Operations apply TPS-style production thinking and integrate ERP management with SPC process control and TQM customer orientation, with a continual-improvement approach to product quality.
The company participates in major trade events, including showcasing chucks and drill chucks at the 134th Canton Fair (2023) and attending CIMT 2025.