Professional engineering calculation applications designed specifically for mechanical engineers, technicians, and manufacturing professionals. This application provides accurate bolt torque calculation function, helping users determine the correct bolt tightening torque value, ensuring the safety and reliability of the connection. The core functions include: Intelligent computing engine: The application incorporates advanced torque calculation algorithms, considering multiple key parameters such as bolt grade, diameter, preload force, friction coefficient, etc. Supports standard bolt grades (4.6, 5.6, 8.8, 10.9, 12.9), automatically matches thread pitch, calculates bearing friction and thread friction components, and provides accurate torque recommendations. User friendly interface: With an intuitive input interface, users only need to input basic parameters such as bolt diameter and preload force, and select the lubrication type to obtain the calculation results. The application will automatically set the corresponding friction coefficient, simplifying the operation process. Data visualization: Provides torque chart function to graphically display the relationship between torque and preload force, helping users understand the impact of parameter changes on results and facilitating parameter optimization. Professional support: Built in detailed usage instructions and technical documents, covering professional information such as calculation formulas, safety factor instructions, friction coefficient reference values, etc., to help users use the application correctly and understand the calculation results. This application is particularly suitable for scenarios such as mechanical assembly, equipment maintenance, and quality control, which can effectively improve work efficiency and reduce the risk of connection failure caused by improper torque. It is an indispensable professional tool for engineering and technical personnel.