Experimental Investigation on the Effect of Arm Length on Accuracy of Torque Wrench

Abstract:

Experiments were carried out to investigate the effect of arm length on the accuracy of two typical conventional torque wrenches, namely, setting type torque wrench (STW) and indicating type torque wrench (ITW). The experiment results demonstrate that the measurement values of STW rises rapidly with decreasing arm length while measured torque of ITW shows irrelevant to arm length. Theoretical solution with respect to STW shows quite good agreement with experiment results. Irrelevance of arm length regard to ITW may be attributable to compensation of bending moment measurement due to proper arrangement of circuit and structural design. In order to conduct a proper assessment at a calibration laboratory or ensure its reliability with reference to actual use conditions, a torque wrench should be used by a customer at the loading point as recommended.

• Periodical: Applied Mechanics and Materials (Volume 853)
• Pages: 216-220
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.853.216
• Online since: September 2016
• Authors: You Gang Peng, Yong Wang*
• Keywords: Arm Length, Indicating Type Torque Wrench, Setting Type Torque Wrench

References

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