Deep Hole Drilling – The Process, Tools and Machines, and Benefits

Deep Hole Drilling is a process that produces holes with high ratios of length to diameter. These drills can be used in a variety of situations and are highly advantageous to the energy and mining industries. In this article, we will explore the process, tools and machines, and benefits of burrowing and excavating. Once you understand the process, you’ll be better able to make informed decisions about this technology. Let’s get started!


Despite its name, burrowing and excavating is not the same as regular hollowing. This process involves hollowing a particularly deep hole in a solid material. While it may sound like a simple task, there are several challenges in this process. While the final product of burrowing and excavating must be of high quality, it must also be consistent and repeatable. Choosing the right tool for the job and implementing the proper operating procedures are critical to maximizing productivity and profitability.

One of the most common challenges in burrowing and excavating is the issue of chip removal. When the chips do not escape, they leave unsightly profiles on the workpiece and can damage tooling. Using a coolant can help in chip evacuation. Another challenge encountered in burrowing and excavating is drill drift. Drilling with long slender drill heads tends to deflect from the spinning axis, compromising accuracy.


While tooling for deep hole hollowing isn’t unique to this application, there are certain considerations to make in order to maximize productivity. While most deep hole drills are internal coolant systems, certain strategies can increase tool life and improve performance. These strategies include retraction techniques and controlling run-out.

When hollowing in a difficult and harsh environment, obviously it may require some professional assistance. You can get some over at or continue reading for more information. Traditional, non-trained hollowing methods aren’t up to the task. Dedicated deep hole hollowing systems can significantly improve output and cost-effectiveness. For example, a four-spindle gundrill machine takes up about the same space as a large lathe.

To ensure high-quality results, deep hole hollowing requires the right tool and operating procedures. Accuracy, repeatability, a sufficient surface finish, and tool life are all critical. Choosing the right tool for the job, as well as implementing the right operating procedures, can help deep hole drilling operations to be both profitable and productive.


The oil and gas industry uses specialized machines for burrowing and excavating. These drills typically measure over 10 m long and need to create extremely accurate bores, which require the use of specially designed tooling and machinery. The depth to diameter ratios of these machines are more than 100x, which makes them an ideal choice for very deep bores and for materials with poor chip-forming properties.

Deep-hole drilling machines are typically toled up with a double tube system, which features a two-tube nozzle and an inner tube that connects to a four-start thread on the drill head. Precihole burrowing and excavating machines offer a wide range of features and capabilities, which are ideally suited for machine shops. These machines include features such as interpolated axes movement, high-pressure coolant pumps, tool breakage monitoring systems, and multiple work holding options.

A BVN machine is capable of drilling holes of O20 to O250 mm and counterboring to O400 mm, with a working length ranging from 500mm to 10m. Its design makes it particularly suitable for large mold bases and tube sheets, and its ability to integrate three to seven axes CNC allows it to be highly versatile.


A dedicated gun drilling machine is a common solution to this problem. However, a multi-spindle drilling machine is not always an option. According to Randy McEachern, product specialist at Sandvik Coromant Canada in Mississauga, Ontario, Canada, burrowing and excavating has specific requirements.

These considerations include the toolholding technique and determining run-out. This article will discuss some of these considerations in greater detail. One of the most obvious advantages of burrowing and excavating is the ability to drill deeper and faster than conventional processes. The process also boasts higher accuracy and rejection rate.

Additionally, it allows for a larger diameter and a larger range of tool diameters than conventional drilling methods. This makes it particularly suitable for making difficult hole patterns. Unlike conventional drilling processes, burrowing and excavating is safer and more efficient. The benefits of deep hole drilling cannot be underestimated, and it should not be ruled out when making a deep hole.


A deep hole drilling process involves cutting metal and cutting a hole in the workpiece. There are several challenges involved in this process and the cost involved can be quite high. The process requires skilled operators who can detect any change in the process through sound.

Consider all the costs before you make your final decision. Read on to learn more about deep hole drilling costs. If you are planning to drill an injection well, read this website for further information. If you intend to use the well for water use, you must consider all aspects of the project, including the costs of the equipment and labor.

While the drill itself can be fairly cheap, other elements of the project are more expensive. Besides the drilling process, the casing and water line connection may also increase costs. The depth and type of the water source must also be considered. Deep hole drilling requires several drill bits and casing. The costs are higher if the water source is shallower than the well.