Extending Service Life and Improving Efficiency-the Way to Maintain Rock Drill Bits

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In engineering fields such as mining and tunnel excavation, rock drill bits are critical tools, and their performance and service life are directly related to project efficiency and quality. However, many engineering teams often neglect the maintenance of rock drill bits when using them, resulting in premature wear of the drill bit, performance degradation, and even safety accidents. Therefore, correctly maintaining rock drill bits, extending their service life, and improving work efficiency are essential skills that every engineer should master. This article will introduce you to the basic knowledge and practical skills of rock drill bit maintenance to help you better manage and use rock drill bits.

The importance of rock drill bit maintenance

rock drill bits

During long-term and high-intensity use, rock drill bits will be affected by various factors such as wear, impact, and corrosion, resulting in a gradual decline in their performance. Failure to carry out timely maintenance will shorten the service life of rock drill bits and affect the efficiency and quality of work. Therefore, regular inspection, cleaning, and replacement of rock drill bits are crucial to ensuring proper operation and extending service life.

Basic steps for rock drill bit maintenance

  • Cleaning: before and after use, any rock powder and dirt on the surface of the rock drill bit should be promptly removed. It can use special cleaning tools or high-pressure gas. However, it’s pivotal to exercise caution and avoid using cleaning tools that are too sharp or rough, as they may scratch the surface of the drill bit.
  • Inspection: regularly check the wear of rock drill bits, especially the carbide buttons. If noticeable wear or damage is detected, it should be promptly repaired or replaced. In addition, check whether the connecting part of the drill bit is loose or damaged to ensure that it is stable and reliable.
  • Lubrication: applying an appropriate amount of lubricating oil to the critical parts of the rock drill bit can reduce friction and wear and extend the service life of the drill bit. But be careful to choose the proper lubricant and avoid using incompatible or inferior lubricating products.

Practical tips for rock drill bit maintenance

rock drill bits

Reasonable selection of drill bits

Select the appropriate rock drill bit based on project needs and rock characteristics. Different types of rocks require different drill bits, and choosing the right drill bit can improve work efficiency and reduce wear. For instance, the chisel bit is appropriate for medium-hard and moderately abrasive rocks and is utilized in light to medium-sized rock drills. On the other hand, the cross bit features a greater number of carbide inserts, leading to slower radial wear and making it less prone to getting stuck. It can withstand relatively high impact energy, making it suitable for tough and highly abrasive rocks or rocks with cracks and interlayers. Use heavy rock drills (such as hydraulic rock drills). The three-blade drill bit is suitable for brittle, solid, and fractured rocks. The button bit is appropriate for brittle and abrasive rocks, capable of withstanding relatively high-impact energy, making it suitable for heavy-duty rock drilling. However, its non-abrasive design may not be as effective in highly abrasive rock formations.

Control drilling speed

During drilling, the operator should reasonably control the drilling speed to avoid being too fast or too slow. Too fast a drilling speed may lead to excessive wear of the drill bit, while too slow a speed may affect the working efficiency.

Check the cooling system regularly

The cooling system of a rock drill is critical to keeping the drill bit temperature stable. Regularly checking the operating status of the cooling system to ensure that it is working properly can effectively prevent the drill bit from being damaged due to overheating.

Storage and maintenance

Rock drill bits also need to be maintained during storage. We should store the drill bit in a dry, ventilated place, avoiding direct sunlight and humid environments. At the same time, regularly inspect and maintain stored drill bits to ensure they are in good condition.

rock drill bits

Precautions for rock drill bit maintenance

  • Avoid overuse: during use, rock drill bits should be prevented from being overused to avoid performance degradation due to fatigue and wear. After continuous operation, the drill bit should rest appropriately to reduce its load and prolong its service life.
  • Pay attention to safe operations: when performing rock drill bit maintenance, pay attention to safe operations and abide by relevant regulations and procedures. Avoid accidental injury or damage to equipment during maintenance.
  • Regular training: regular training activities should be organized to improve the engineering personnel’s maintenance skills and safety awareness. Through training, engineering personnel can master correct maintenance methods and techniques to improve the efficiency and safety of rock drill bits.
  • Establish a bit management system: to minimize avoidable losses, it’s essential to implement stringent management practices during drill bits use. The construction unit must identify the alloy grade of the drill bits used. After consuming a batch of drill bits, detailed statistics must be made on the damaged drill bits according to fragments, peeling off, swelling, cracking, broken drill bits, broken pants, etc. Collecting data to identify the causes of damage, enhancing the quality of drill bits, and selecting appropriate alloy grades are essential ways to mitigate losses.


Maintenance of rock drill bits is a crucial aspect of ensuring project safety and efficiency. By mastering the correct maintenance methods and performing regular maintenance and repairs, we can extend the service life of rock drill bits, improve work efficiency, and provide a strong guarantee for the smooth progress of the project. Therefore, we should fully realize the importance of rock drill bit maintenance and implement it in actual work.

In the future engineering field, with the advancement of technology and the continuous improvement of engineering needs, rock drill bit’s performance, and service life requirements will become increasingly higher. Therefore, we should continuously learn and master new maintenance technologies and methods to adapt to changing engineering needs. At the same time, it is necessary to strengthen the training and education of construction personnel to improve their maintenance awareness and skill level to ensure the effective implementation of rock drill bit maintenance.

In short, extending the service life of rock drill bits and improving work efficiency are important issues that we need to pay attention to in the engineering field. Through correct maintenance and upkeep, we can achieve this goal and make a positive contribution to the smooth progress of the project and the sustainable development of the enterprise.

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