Journal of Production Engineering

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Vol. 28 No. 1 (2025)
Original Research Article

Influence of coolant pressure on the wear and tool life of gun drills in deep drilling of 24CrMoV5-5 steel

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  • Milan Ivković,
  • Strahinja Djurović,
  • Vladimir Kočović,
  • Dragan Džunić,
  • Aleksandar Djordjević,
  • Slobodan Mitrović,
  • Suzana Petrović Savić
Milan Ivković
Faculty of Engineering University of Kragujevac, Sestre Janjic 6, 3400, Kragujevac, Serbia
Strahinja Djurović
Faculty of Technical Sciences, University of Pristina in Kosovska Mitrovica, Knjaza Milosa 7, 38220, Kosovska Mitrovica, Serbia
Vladimir Kočović
Faculty of Engineering University of Kragujevac, Sestre Janjic 6, 3400, Kragujevac, Serbia
Dragan Džunić
Faculty of Engineering University of Kragujevac, Sestre Janjic 6, 3400, Kragujevac, Serbia
Aleksandar Djordjević
Faculty of Engineering University of Kragujevac, Sestre Janjic 6, 3400, Kragujevac, Serbia
Slobodan Mitrović
Faculty of Engineering University of Kragujevac, Sestre Janjic 6, 3400, Kragujevac, Serbia
Suzana Petrović Savić
Faculty of Engineering University of Kragujevac, Sestre Janjic 6, 3400, Kragujevac, Serbia
DOI: https://doi.org/10.24867/JPE-2025-01-019

Published 2025-06-24

abstract views: 66 // FULL TEXT ARTICLE (PDF): 0


Keywords

  • Deep Drilling,
  • Tool Wear,
  • Coolant Pressure,
  • Gun Drills,
  • Cooling Efficiency,
  • Machining Parameter,
  • Optimization
    • ...More
    Less

How to Cite

Ivković, Milan, Strahinja Djurović, Vladimir Kočović, Dragan Džunić, Aleksandar Djordjević, Slobodan Mitrović, and Suzana Petrović Savić. 2025. “Influence of Coolant Pressure on the Wear and Tool Life of Gun Drills in Deep Drilling of 24CrMoV5-5 Steel”. Journal of Production Engineering 28 (1):19-25. https://doi.org/10.24867/JPE-2025-01-019.

Copyright (c) 2025 Journal of Production Engineering

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

In modern material processing industries, the constant need for increased efficiency and precision drives ongoing research aimed at optimizing technological parameters. The presented study aims to analyze excessive wear and chipping of gun drills during the deep drilling process of 24CrMoV5-5 steel. The experiment was conducted on a horizontal deep drilling machine, model T30-2-500 (TBT Tiefbohrtechnik GmbH+Co), under real production conditions. The investigation included the performance analysis of both factory-reground and subsequently reground drills, with the number of tests enabling a detailed comparison across different process regimes. The process parameters were systematically varied in three phases, with a focus on increasing the coolant pressure from 50 to 60 bar, while other conditions, such as spindle speed and feed rate, remained constant. The results indicate that increasing coolant pressure allows for more efficient cooling, stabilization of temperature fluctuations in the cutting zone, and improved chip evacuation, directly leading to reduced chipping and more uniform tool wear. Consequently, this extends the service life of the drills and preserves the high precision of the machined surface. The obtained results provide valuable guidelines for optimizing deep drilling parameters, highlighting the importance of properly adjusted cooling conditions in industrial machining. Future research will focus on integrating additional processes, including variations in cutting speed, the application of different cooling techniques, and the implementation of intelligent tool condition monitoring systems, aiming to achieve an optimal balance between process efficiency and tool longevity.

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