Title: Cutting performance of various CNC drilling cycles at diverse cutting speeds concerning hole dimension error, surface roughness, and cutting time

Authors: Sutopo; Bernadus Sentot Wijanarka; Aris Eko Wibowo; Achmad Arifin; Yu-Ren Wu

Addresses: Department of Mechanical Engineering Education, Universitas Negeri Yogyakarta, Indonesia ' Department of Mechanical Engineering Education, Universitas Negeri Yogyakarta, Indonesia ' Department of Mechanical Engineering Education, Universitas Negeri Yogyakarta, Indonesia ' Department of Mechanical Engineering Education, Universitas Negeri Yogyakarta, Indonesia ' Department of Mechanical Engineering, National Central University, Taiwan

Abstract: Many drilling cycles with various characteristics are available in CNC machining. This study empirically verified the distinctive drilling cycles with different cutting speeds to evaluate their cutting performance. The simple/spot drilling (G81 and G82) and peck drilling (G73 and G83) were operated at various cutting speeds on the ST-37 workpiece using the HSS drill bit. The drilled-hole dimension error, surface roughness, and drilling time were measured. The results confirmed that the peck drilling achieved lower dimension error and produced smoother surfaces than the simple/spot drilling. They revealed that G73 exhibited the slightest diameter error, and G83 achieved the finest surface roughness. Further, the results demonstrated that the diameter error decreased with increasing cutting speed. Still, the high cutting speed caused rapid wear on the cutting edge of the drill bit, resulting in a rougher drilled surface. In addition, various cutting speeds did not affect the drilling time required. However, it significantly impacted the diameter error and the surface roughness.

Keywords: CNC machining; cutting parameter; drilling canned cycle; hole dimension error; cutting time; surface roughness.

DOI: 10.1504/IJMMM.2025.147839

International Journal of Machining and Machinability of Materials, 2025 Vol.27 No.3, pp.224 - 250

Received: 25 Feb 2024
Accepted: 22 Jun 2024
Published online: 04 Aug 2025 *

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