Sagitov, A., Sherov, K., Nasad, T., Abdugaliyeva, G. and Okimbayeva, A. 2023. Calculation of multi-blade rotary-friction tool shaft for strength. Bulletin of L.N. Gumilyov Eurasian National University Technical Science and Technology Series. 144, 3 (Sep. 2023), 8–19. DOI:https://doi.org/10.32523/2616-7263-2023-144-3-8-19.