Articles | Volume 17, issue 1
https://doi.org/10.5194/ms-17-19-2026
https://doi.org/10.5194/ms-17-19-2026
Research article
 | 
23 Jan 2026
Research article |  | 23 Jan 2026

Design and experimental verification of the loading mechanism for a compact bolt installation tool

Li Wensheng, Wu Kun, Wang Shuai, Xia Binhong, Zuo Dunwen, and Lu Wenzhuang

Cited articles

Bin Kamarudin, M. N., Mohamed Ali, J. S., Aabid, A., and Ibrahim, Y. E.: Buckling Analysis of a Thin-Walled Structure Using Finite Element Method and Design of Experiments, Aerospace, 9, 541, https://doi.org/10.3390/aerospace9100541, 2022. 
Boyer, R. R., Cotton, J. D., Mohaghegh, M., and Schafrik, R. E.: Materials Considerations for Aerospace Applications, MRS Bulletin, 40, 1055–1066, https://doi.org/10.1557/mrs.2015.278, 2015. 
Chen, C.-M., Chang, H.-L., and Lee, C.-Y.: An Experimental Study on the Torsional Stiffness and Limit Torque of a Jaw Coupling with Consideration of Spacer's Hardness and Installation Methods, J. Mech., 38, 195–203, https://doi.org/10.1093/jom/ufac018, 2022. 
Chen, P., Ye, X., Liu, H., Hu, Y., and Yu, X.: Axial Stress Measurement of Bolts Based on Ultrasonic Energy Attenuation, Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica, 44, https://doi.org/10.7527/S1000-6893.2022.27250, 2023. 
Croccolo, D., De Agostinis, M., Olmi, G., and Vincenzi, N.: A Practical Approach to Gear Design and Lubrication: A Review, Lubricants, 8, 84, https://doi.org/10.3390/lubricants8090084, 2020. 
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Short summary
We developed a new tool to solve the challenge of installing high-strength bolts within the extremely compact spaces of aircraft engines. Our design employs a unique ratchet–pawl mechanism driven by a hydraulic cylinder to generate high torque. Testing confirmed that the tool can safely deliver an average torque of 136 N m within a mere 4 mm gap. This successful innovation enhances assembly safety and efficiency in confined areas and establishes a foundation for the intelligent tools.
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