Actual Problems in Machine Building. Vol. 13. N 3-4. 2026 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 28 EFFICIENCY OF MACHINING LARGE-MODULE CYLINDRICAL GEARS Ni K.A.1, Doctoral candidate, e-mail: kirill00.kz@gmail.com Mukanov R.B.2, D.Sc. (Engineering), Professor, e-mail: ruslangr82@mail.ru Kassenov A.Z.2, Ph.D. (Engineering), Professor, e-mail: a.kasenov@kaznuvhi.edu.kz Abishev K.K.2, Ph.D. (Engineering), Professor, e-mail: a.kairatolla@mail.ru 1Satbayev University, 22 Satpayev Street, Almaty, 050013, Kazakhstan 2S. Toraighyrov Pavlodar State University, 64 Lomov Street, Pavlodar, 140000, Kazakhstan Abstract This paper presents a comparative analysis of labor intensity and machining efficiency in the production of large-module cylindrical gears using conventional gear cutting equipment and modern multi-axis CNC machining. The study focuses on a spur gear with a module of 20 mm, 44 teeth, and a face width of 300 mm, manufactured from alloy structural steel 36Cr2Ni2MoV (0.36 C2 Cr–2 Ni–Mo–V). The standard machining time was determined based on industry time standards for gear hobbing. Additionally, an analysis of experimental data from CNC machining using tools with different cutting performance was conducted. Three machining strategies were analyzed: conventional gear hobbing, CNC machining with standard carbide tools, and CNC machining with high-feed tools. The results show that CNC machining with standard tools requires up to 99 hours, exceeding the normative gear hobbing time of 90 hours due to reduced cutting parameters and an increased number of passes. In contrast, the application of high-feed tools reduces machining time to 39.6 hours by increasing feed per tooth and decreasing the number of passes. The findings demonstrate that the use of high-performance cutting tools is a key factor in improving machining efficiency and confirm the feasibility of multi-axis CNC machining for large-module gear production. Keywords gear hobbing; cylindrical gears; CNC machining; high-feed milling; carbide tools; ball end milling cutters; machining efficiency; machining time.
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