Working principle of fastener friction coefficient tester

Working principle of fastener friction coefficient tester：
Installation sample: Install the bolts and nuts into the fixture of the testing machine to ensure correct installation.
Apply axial force: Apply axial force through the loading system to simulate the preload force in actual assembly.
Apply torque: Apply torque through a torque sensor to rotate the bolt or nut.
Data collection: Real time recording of torque, axial force, angle and other data.
Calculate friction coefficient: Based on the relationship between torque and axial force, calculate the total friction coefficient, thread friction coefficient, and support surface friction coefficient.