Deep Hole Drilling: Precision, Craftsmanship and Quality as Core Principles
Deep-hole drilling — also known as deep drilling — is one of Tumag’s core competencies. As a specialised supplier in precision mechanical machining, we produce deep, narrow holes with extremely high dimensional accuracy and perfect surface quality.
Our precision components are used in demanding sectors such as healthcare, aerospace and industrial machine building — for moulds, cutting dies and precision mechanical components where every micrometre counts.
What is deep hole drilling? A specialised machining technique
Deep hole drilling is a machining process used to create small-diameter holes over long depths, typically with strict tolerances and a superior surface finish. It requires more than correct machine settings: tool geometry, coolant delivery, fixturing and thermal control all play a critical role in achieving optimal results.
Applications are found in many industries, including:
- Cooling and lubrication channels in moulds and stamping tools
- Heating and temperature control systems for industrial tooling
- Feed-through channels for electronics and sensors
- Lightweight construction components
- Precision parts for medical, aerospace, automotive and industrial machinery
The quality of these channels directly influences product performance, lifespan and reliability.
Why accuracy in deep hole drilling is essential
With deep drilling, even the smallest deviation — just hundredths of a millimetre — can lead to major issues across long distances. A slight drift at the start of the bore can become a significant misalignment at full depth.
For this reason, precision is critical. Tumag combines years of experience with extensive knowledge of material behaviour. Through continuous measuring, analysing and fine-tuning, we ensure straightness, roundness and dimensional accuracy — regardless of complexity or drilling depth.
Advanced machines and tools
High-quality deep-hole drilling requires both modern equipment and craftsmanship. At Tumag, we have a modern machine park specially equipped for this form of machining. Our machines are designed to minimise vibrations, control heat generation and ensure a constant supply of coolant. This makes it possible to achieve perfect results, even under challenging conditions.
We work exclusively with high-performance tools tailored to material type, drilling depth and diameter. Combined with our expertise, this results in precise, stable and repeatable outcomes.
Deep hole drilling at Tumag: process control and reliability
For Tumag, deep hole drilling is more than a machining step — it is a fully controlled and optimised process. Every job begins with a thorough analysis:
- What is the function of the hole?
- Which tolerances are critical?
- How will the material behave?
- Which strategy guarantees optimal straightness and surface finish?
This approach ensures that we consistently meet the most demanding specifications and maintain maximum process stability.
More information or a project inquiry?
If you would like more information about our deep hole drilling expertise or wish to discuss a project, Tumag is ready to support you with precision and technical insight.
Do not hesitate to let us know — we are happy to assist you further.
Frequently asked questions about deep-hole drilling (FAQ)
What is the difference between deep-hole drilling and deep drilling?
Both terms refer to the same technique. “Langgatboren” is the commonly used Dutch term; “diepgatboren” is often used in technical and industrial contexts. At Tumag, we use both terms interchangeably.
Which materials can be machined?
Tumag machines a wide range of materials, including steel, stainless steel, aluminium, titanium and plastics. The choice of material also determines the tool selection and machining strategy.
How is straightness guaranteed at great drilling depths?
Tumag works with specialised, high-precision machines specifically equipped for deep-hole drilling. Combined with the right tool geometry, continuous measurement during the process and strict control of heat generation, we guarantee the required straightness even with a high depth-to-diameter ratio.
Does Tumag also supply complete precision components or only drilling work?
At Tumag, deep-hole drilling is usually applied as part of the complete machining process of a precision component. We support the component from raw material to finished product, with deep-hole drilling being one of the operations within a broader precision mechanical machining process. At the customer’s request, however, we can also carry out drilling work only on existing or externally machined components.
