Thin-walled tube load cell for bolt torsion test

Abstract The purpose of this research is to know that thin-walled load cell can be used properly to measure the torque for high quality bolt torsion testing. The load cell made from SUS 304 tube completed with four holes was designed. It was developed from the previous one that using intact tube. For strain sensing in orientation at +45 degree and −45 degree, two rosette strain gages were used in the opposite position. The strain gages connected in full Wheatstone bridge configuration to a Computing Data Log-ger. Set up calibration equipment for torsion load only was built for this load cell and the result is constant 12.85 for Data Logger setting. A torque wrench was used for setting maximum load applied and load cell with Data Logger measure and counting the actual torque. For the experiment two size hexagonal zinc coated steel bolt M8 and M10 were used for testing sample. Test result shows that all samples can reach mini-mum torque load that mentioned in specification.