Hangzhou Naizhun Precision Machinery Co., Ltd. is a national high-tech enterprise specializing in the R&D, manufacturing, and global distribution of hydraulic bolting tools. Established with a commitment to engineering precision and manufacturing excellence, our company has grown into a trusted supplier of hydraulic torque wrenches, hydraulic pumps, bolt tensioners, and customized bolting solutions.
With over a decade of manufacturing experience, we have developed 19 patented technologies covering hydraulic torque wrench drive mechanisms, hollow wrench designs, multi-stage hydraulic pump systems, and double-stage cylinder bolt tensioners.
We serve customers in more than 30 countries across Europe, the Americas, the Middle East, and Asia-Pacific. Our ODM capabilities allow us to customize tool specifications, drive sizes, and accessories according to client-specific requirements.
Every product undergoes rigorous testing before shipment, including torque accuracy verification, pressure resistance testing, and operational cycle testing.
Our products are CE certified and manufactured under lSO9001 quality management system, ensuring consistent performance in the most demanding industrial environments.
Our products are CE certified and manufactured under lSO9001 quality management system, ensuring consistent performance in the most demanding industrial environments.
These tools are widely used in wind power installation and maintenance, electric power plant construction, mining equipment assembly,shipbuilding, petrochemical flange management.
Dongqi-fan
Fujian Longyan Lantian Cement
Fujian Longyan Lantian Cement
Wujiang Yifa
Our Solutions
These tools are widely used in wind power installation and maintenance, electric power plant construction, mining equipment assembly, shipbuilding, petrochemical flange management, and heavy machinery manufacturing.
