Impact of spindle tilt and machining parameters on surface roughness in milling

Romiyadi Romiyadi, Adi Febrianton

Abstract


This study aims to analyze the influence of spindle tilt and machining parameters (feed rate, depth of cut, and spindle speed) on surface roughness in milling operations using a Knuth UFM 2 universal milling machine. A parametric experimental approach was used, where parameters were varied systematically to assess their influence on surface quality. Results show that increasing spindle tilt, feed rate, and depth of cut generally raises surface roughness, while higher spindle speeds reduce it, producing smoother surfaces. The optimal surface quality was achieved during the first up-milling test with a spindle inclination of 30°, feed rate of 108 m/min, spindle speed of 720 rpm, and depth of cut of 0.50 mm, yielding a surface roughness (Ra) of 0.258 µm. In contrast, higher tilt angles and cutting loads significantly degraded surface finish, with roughness increasing by up to 95.91% when spindle tilt was raised from 30° to 60°, by 52.86% when depth of cut increased from 0.50 mm to 1.50 mm, and by 79.25% when feed rate rose from 45 m/min to 233 m/min. Conversely, increasing spindle speed from 148 rpm to 720 rpm reduced Ra by 99.81%. These findings highlight the importance of selecting appropriate parameter combinations to achieve precision, efficiency, and sustainability in milling. The results also provide practical reference for industrial applications and vocational training in manufacturing engineering.


Keywords


Milling machine; surface roughness; spindle tilt; depth of cut; feed rate; spindle speed

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References


R. Romiyadi, “Pengaruh kemiringan spindel dan kecepatan pemakanan terhadap getaran mesin frais universal knuth UFM 2,†J. Sains dan Ilmu Terap., vol. 1. no. 1. pp. 5–10. 2018.

R. Romiyadi, “Pengaruh kemiringan benda kerja dan kecepatan pemakanan terhadap getaran mesin frais universal knuth UFM 2,†Mechanical, vol. 7, no. 2, pp. 52–60. 2016, doi: 10.23960/mech.v7.i2.201609.

A. Sapkota, S. K. Ghimire, and S. Adanur, “A review on fused deposition modelling (FDM)-based additive manufacturing (AM) methods, materials and applications for flexible fabric structures,†J. Ind. Text., vol. 54, pp. 1–51. 2024, doi: 10.1177/15280837241282110.

Z. Huda, Machining Processes and machines. Taylor & Francis, 2020. doi: 10.1201/9781003081203.

A. Febrianton, I. P. Putri, R. Romiyadi, P. Irwan, and P. Sihotang, “Pengaruh kedalaman potong menggunakan insert radius 0.4 mm cnmg 120404n terhadap kekasaran permukaan (surface roughness) Baja Karbon S45C,†J. Tek. Ind. Terintegrasi, vol. 7, no. 3, pp. 1460–1467, 2024, doi: 10.31004/jutin.v7i3.28567.

M. P. Groover, Fundamentals of modern manufacturing material, Processes, and Systems. Wiley, 2013.

T. He, W. Chen, Z. Liu, Z. Gong, S. Du, and Y. Zhang, “The impact of surface roughness on the friction and wear performance of GCr15 bearing steel,†Lubricants, vol. 13, no. 4, pp. 1–16, 2025, doi: 10.3390/lubricants13040187.

H. El-Hofy, Fundamentals of Machining Processes, vol. 17. Taylor & Francis, 2019.

J. V. Abellán-Nebot, C. Vila Pastor, and H. R. Siller, “A review of the factors influencing surface roughness in machining and their impact on sustainability,†Sustain. , vol. 16, no. 5, 2024, doi: 10.3390/su16051917.

M. C. Shaw, Manufacturing processes for engineering materials, vol. 25, no. 1. Pearson Education Limited, 2023. doi: 10.1016/0020-7357(85)90061-7.

S. Kalpakjian and S. R. Schmid, Manufacturing processes for engineering materials. Pearson Education, 2008.

E. Abdelnasser, S. El-Sanabary, A. Nassef, A. Barakat, and A. Elkaseer, “Influence of technological parameters on chip formation and chip control in precision hard turning of Ti-6Al-4V,†Micromachines, vol. 14, no. 10. pp. 1–19, 2023, doi: 10.3390/mi14101973.

A. la Monaca et al., “Surface integrity in metal machining - Part II: Functional performance,†Int. J. Mach. Tools Manuf., vol. 164, no. December 2020. p. 103718, 2021. doi: 10.1016/j.ijmachtools.2021.103718.

G. Boothroyd and W. A. Knight, Fundamentals of machining and machine tools. New York : Marcel Dekker, Inc, 2014.

J. Varga, M. Demko, Ľ. KaÅ¡Äák, p. ižol, m. vrabeľ, and j. brindza, “Influence of tool inclination and effective cutting speed on roughness parameters of machined shaped surfaces,†Machines, vol. 12, no. 5, 2024, doi: 10.3390/machines12050318.

S. Kalpakjian and S. R. Schmid, Manufacturing engineering and technology. Singapore : Prentice Hall, 2006.

H. N. Gupta, R. C. Gupta, and A. Mital, Manufacturing processes. New Age International (P) Ltd., Publisher, 2009.

T. Pereira, J. V. Kennedy, and J. Potgieter, “A comparison of traditional manufacturing vs additive manufacturing, the best method for the job,†Procedia Manuf., vol. 30. pp. 11–18, 2019, doi: 10.1016/j.promfg.2019.02.003.

Y. M. Putra, G. E. Timuda, N. Darsono, N. Chollacoop, and D. S. Khaerudini, “Optimization of Machining Parameters on the Surface Roughness of Aluminum in Cnc Turning Process Using Taguchi Method,†Int. J. Innov. Mech. Eng. Adv. Mater., vol. 5, no. 2, p. 56, 2023, doi: 10.22441/ijimeam.v5i2.21679.

D. A. Stephenson and J. S. Agapiou, Metal cutting theory and practice. CRC Press, 2016.

Y. C. Lin, K. Da Wu, W. C. Shih, P. K. Hsu, and J. P. Hung, “Prediction of surface roughness based on cutting parameters and machining vibration in end milling using regression method and artificial neural network,†Appl. Sci., vol. 10. no. 11. 2020. doi: 10.3390/app10113941.

Z. Zhang, Y. Wu, D. Wang, B. Wang, and L. Huang, “Experimental and numerical investigation of passive flow control using L-shaped endwall groove in an axial flow compressor stage,†Chinese J. Aeronaut., p. 103626, 2025, doi: 10.1016/j.cja.2025.103626.

V. Lamngeun, Manufacturing Processes 4-5. Open Oregon Educational Resources, 2017.

H. Attia et al., “Physics based models for characterization of machining performance – A critical review,†CIRP J. Manuf. Sci. Technol., vol. 51. no. May, pp. 161–189, 2024, doi: 10.1016/j.cirpj.2024.04.008.

P. Vavruska, F. Bartos, M. Stejskal, M. Pesice, P. Zeman, and P. Heinrich, “Increasing tool life and machining performance by dynamic spindle speed control along toolpaths for milling complex shape parts,†J. Manuf. Process., vol. 99, no. August 2022, pp. 283–297, 2023, doi: 10.1016/j.jmapro.2023.04.058.

T. Lakner and M. Hardt, “A novel experimental test bench to investigate the effects of cutting fluids on the frictional conditions in metal cutting,†J. Manuf. Mater. Process., vol. 4, no. 2, pp. 1–18, 2020. doi: 10.3390/jmmp4020045.

H. Narita, “Cutting features between surface roughness in feed direction and machining state of radius end mill against inclined surfaces (In case of contour machining and five-axis machining with constant tilt angle),†Int. J. Autom. Technol., vol. 14, no. 1. pp. 46–51. 2020. doi: 10.20965/ijat.2020.p0046.

Ruzova and B. Haddadi, “Surface roughness and its measurement methods - Analytical review,†Results in Surfaces and Interfaces, vol. 19, no. November 2024, p. 100441. 2025, doi: 10.1016/j.rsurfi.2025.100441.

B. Lv, B. Lin, J. Zhang, C. Liu, L. Wang, and T. Sui, “Micro- and nano-scale spindle perpendicularity modulation method to enhance the quality of milled surfaces,†Int. J. Extrem. Manuf., vol. 6, no. 6, 2024, doi: 10.1088/2631-7990/ad7076.

L. Pálfi, J. Beke, and S. Szalai, “A Pre-Study of the relationship between machining technology parameters and surface roughness in the scope of the optimal cost efficiency of machining †,†Eng. Proc., vol. 79, no. 1. 2024, doi: 10.3390/engproc2024079090.

J. E. Ribeiro, M. B. César, and H. Lopes, “Optimization of machining parameters to improve the surface quality,†Procedia Struct. Integr., vol. 5, pp. 355–362, 2017, doi: 10.1016/j.prostr.2017.07.182.

B. Bloul, H. Chanal, and M. Meziane, “Study of the influence of cutting parameters on tool wear and the state of the machined surface,†Adv. Mech. Eng., vol. 16, no. 9, pp. 1–8, 2024, doi: 10.1177/16878132241273550.

K. Vasilko and Z. MurÄinková, “Tool-workpiece interaction in the cutting process and its use,†TEM J., vol. 10. no. 4, pp. 1733–1737, 2021. doi: 10.18421/TEM104-33.

M. Azizur Rahman et al., “Influence of feed rate response (FRR) on chip formation in micro and macro machining of al alloy,†Metals (Basel)., vol. 11. no. 1. pp. 1–21. 2021. doi: 10.3390/met11010159.

Y. Akiyama, M. Iwaki, Y. Komagamine, S. Minakuchi, and M. Kanazawa, “Effect of spindle speed and feed rate on surface roughness and milling duration in the fabrication of milled complete dentures: an in vitro study,†Appl. Sci., vol. 13, no. 24, 2023, doi: 10.3390/app132413338.

I. Sztankovics, “The analytical and experimental analysis of the machined surface roughness in high-feed tangential turning,†Eng, vol. 5, no. 3, pp. 1768–1784, 2024, doi: 10.3390/eng5030093.

A. Kumar, “Critical state-of-the-art literature review of surface roughness in incremental sheet forming: A comparative analysis,†Appl. Surf. Sci. Adv., vol. 23, no. June, p. 100625, 2024, doi: 10.1016/j.apsadv.2024.100625.

F. Zhujani, G. Todorov, K. Kamberov, and F. Abdullahu, “Mathematical modelling and optimization of machining parameters in CNC turning process of Inconel 718 using the Taguchi method,†J. Eng. Res., vol. 13, no. 1. pp. 320–330. 2024, doi: 10.1016/j.jer.2023.10.029.

M. Soori and M. Asmael, “A Review of the recent development in machining parameter optimization,†Jordan J. Mech. Ind. Eng., vol. 16, no. 2, pp. 205–223, 2022.

V. F. C. Sousa et al., “Cutting forces assessment in CNC machining processes: A critical review,†Sensors (Switzerland), vol. 20. no. 16, pp. 1–26, 2020. doi: 10.3390/s20164536.

A. Mgherony and B. Mikó, “The effect of the spindle speed control when milling free-form surfaces,†Int. J. Adv. Manuf. Technol., pp. 1439–1449, 2024, doi: 10.1007/s00170-023-12811-1.

J. Li et al., “Research on the effect of spindle speed on the softening and hardening characteristics of the axial operating stiffness,†Lubricants, vol. 10. no. 6, pp. 1–14, 2022.

G. H. Gowd, M. V. Goud, K. D. Theja, and M. G. Reddy, “Optimal selection of machining parameters in CNC turning process of EN-31 using intelligent hybrid decision making tools,†Procedia Eng., vol. 97, pp. 125–133, 2014, doi: 10.1016/j.proeng.2014.12.233.

E. Ateş and N. Serbest, “Investigation of effects of feed rate and cutting-edge angle variation on surface roughness in external cylindrical turning process of Ms58 Brass material,†Appl. Sci., vol. 14, no. 24, 2024, doi: 10.3390/app142412039.

R. Binali, L. R. Ribeiro da Silva, D. Y. Pimenov, M. Kuntoğlu, A. R. Machado, and E. Linul, “A review on progress trends of machining of Carbon Fiber Reinforced Plastics,†J. Mater. Res. Technol., vol. 33, no. October, pp. 4332–4359, 2024, doi: 10.1016/j.jmrt.2024.10.050.

M. Sanz-Calle, J. Munoa, L. Morelli, A. Iglesias, L. N. López de Lacalle, and Z. Dombovari, “On the effect of radial engagement on the milling stability of modes perpendicular to the feed direction,†CIRP J. Manuf. Sci. Technol., vol. 49, no. October 2023, pp. 111–127, 2024, doi: 10.1016/j.cirpj.2024.01.006.

N. Praveen et al., “Results in engineering effect of cnc turning parameters on MRR , Cutting Force and Surface Roughness for Ternary Shape Memory Alloys ( SMAs ),†Results Eng., vol. 26, no. April, p. 104876, 2025, doi: 10.1016/j.rineng.2025.104876.

N. E. Sizemore, M. L. Nogueira, N. P. Greis, and M. A. Davies, “Application of machine learning for improved surface quality classification in ultra-precision machining of germanium,†J. Manuf. Syst., vol. 65, no. August, pp. 296–316, 2022, doi: 10.1016/j.jmsy.2022.09.001.

M. A. Rubeo and T. L. Schmitz, “Milling force modeling : a comparison of two approaches,†Procedia Manuf., vol. 5, pp. 90–105, 2016, doi: 10.1016/j.promfg.2016.08.010.




DOI: http://dx.doi.org/10.30811/jpl.v23i5.7258

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