There is no absolute difference in accuracy between universal electronic tensile testing machines and torsion testing machines. The two set accuracy standards for different mechanical testing dimensions, and the precision levels of conventional mainstream models are similar, with only differences in high-precision models and measurement parameter details. Specific examples include:

The precision of conventional models is basically the same. According to industry standards and mainstream product parameters, conventional universal electronic tensile testing machines are mostly0.5 level accuracy, with a force indication error of around ± 0.5%, and some basic models can reach level 1 (± 1%); The conventional models of torsion testing machines are also mainly based on level 1 accuracy, and the indication errors of torque and torsion angle are generally within ± 1%. Universal electronic tensile testing machines and material torsion testing machines commonly used in industrial quality inspection can meet the basic mechanical testing accuracy requirements for batch materials, and their accuracy performance is at the same level.

The upper limit of the universal electronic tensile testing machine is higher in high-precision models, and the technical maturity of the universal electronic tensile testing machine in the high-precision field is higher. The model can break through the conventional accuracy limitations. For example, some research grade models can achieve precision ± 0.25%, some micro force models can even reach ± 0.1%, with a load sensor resolution of up to 1/300000, and can accurately capture small force changes of a few grams and deformation of hair thickness. At present, among the publicly available parameters of torsion testing machines, even the models are mostly maintained at level 1 accuracy, and the torque indication error is difficult to reduce to below ± 0.5%. This is mainly because during the torque transmission process, factors such as the coaxiality of the fixture and dynamic errors in angle measurement are more difficult to control, making high-precision breakthroughs more challenging.

The accuracy evaluation dimensions are different, and it is impossible to directly compare the accuracy evaluation indicators of the two across dimensions. The parameters belong to different dimensions and there is no direct comparability. The accuracy of the universal electronic tensile testing machine focuses on three core parameters: force value, displacement, and deformation, such as displacement resolution that can reach0.02μm， The deformation measurement error is better than ± 0.5%; The accuracy of the torsion testing machine is based on torque and torsion angle, with a minimum reading of 0.1 ° for torsion angle and an accuracy of ± 1% for angle measurement. Simply put, the former measures the accuracy of "tension deformation", while the latter measures the accuracy of "torque angle". Both serve different testing needs and cannot simply determine which one has higher accuracy.