Improving Drilled Hole Quality in Deep Hole Drilling of Stainless Steel Using Nanofluid Lubrication
| International Journal of Mechanical Engineering |
| © 2025 by SSRG - IJME Journal |
| Volume 12 Issue 12 |
| Year of Publication : 2025 |
| Authors : Thu-Ha Mai, Van-Du Nguyen, Ky-Thanh Ho |
10.14445/23488360/IJME-V12I12P101
How to Cite?
Thu-Ha Mai, Van-Du Nguyen, Ky-Thanh Ho, "Improving Drilled Hole Quality in Deep Hole Drilling of Stainless Steel Using Nanofluid Lubrication," SSRG International Journal of Mechanical Engineering, vol. 12, no. 12, pp. 1-9, 2025. Crossref, https://doi.org/10.14445/23488360/IJME-V12I12P101
Abstract:
This work presents a new lubrication strategy for single-stroke drilling of deep holes with a length-to-diameter ratio of eight in austenitic stainless steel SUS 304. The nanofluid used for cooling was prepared in two steps: initially, graphene nanosheets were dispersed into an emulsion, followed by dilution with tap water. All drilling trials were conducted at low pressure and flow rate, using internal lubrication through the drill bit. Compared with conventional emulsions, the nanofluid promoted more effective chip evacuation, lowered thrust force, and consequently prolonged tool life. The results further demonstrated that nanofluid lubrication in deep hole drilling enhanced hole quality, resulting in more uniform diameters and lower burr heights. Using a Taguchi L9 design, the optimal cutting parameters were determined as a spindle speed of 610 rpm and a feed rate of 0.06 mm/rev, which provided the best combination of dimensional accuracy and tool life. This strategy allows continuous deep-hole drilling without pecking, high-pressure coolant, or ultrasonic assistance, while remaining effective for difficult-to-cut materials.
Keywords:
Nanofluid, Deep hole drilling, Chip morphology, Tool life, Diameter accuracy.
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