The Nord Tools 7.0mm twist drill bit is a high-performance tool engineered for demanding metalworking tasks. Manufactured to the DIN 338 standard, this Type N drill bit features a robust construction made from high-speed steel alloyed with 5% cobalt (HSSE-Co5). This specific composition provides enhanced hardness and superior heat resistance, making it an essential component for professionals who require consistent performance when working with challenging materials.
Advantages
The primary benefit of this drill bit lies in its HSSE-Co5 material composition, which significantly extends the tool's lifespan compared to standard high-speed steel bits. The cobalt content ensures that the cutting edge remains sharp even when subjected to the high temperatures generated during the drilling of tough, heat-resistant alloys. Its precision-ground geometry facilitates clean hole formation and reduces the risk of work hardening, ensuring efficient material removal and reliable results in industrial and workshop environments.
Suitable for
- Drilling stainless steel and acid-resistant steels
- Machining alloyed and non-alloyed steels
- Working with cast iron and high-strength metals
- Professional metal fabrication and maintenance tasks
When it may not be suitable
This drill bit is specifically optimized for metalworking and may not be the most cost-effective choice for drilling soft materials like wood or plastics, where standard carbon steel bits would suffice. Additionally, it is not intended for masonry or concrete applications, as the cutting geometry and material properties are not designed to withstand the impact forces associated with stone drilling.
Key specifications
- Diameter: 7.0mm
- Material: HSSE-Co5 (High-speed steel with 5% cobalt)
- Standard: DIN 338
- Type: N (Normal helix angle)
- Application: High-strength metal drilling
How to use
To achieve the best results, secure the workpiece firmly in a vice or clamp to prevent vibration. Use a drill press or a stable hand drill with appropriate speed settings, as cobalt bits perform best at lower speeds with consistent, moderate pressure. It is recommended to use a high-quality cutting oil or coolant during the drilling process to dissipate heat and prolong the life of the cutting edge. Always ensure the drill bit is aligned perpendicularly to the surface before starting the operation.
What to consider before purchase
- Verify that the 7.0mm diameter matches your specific project requirements.
- Ensure your drilling equipment is compatible with standard cylindrical shank drill bits.
- Consider the hardness of the material you intend to drill to ensure HSSE-Co5 is the correct choice.
Usage recommendations
For optimal performance and to prevent premature breakage, avoid applying excessive lateral pressure during the drilling process. Regularly clear metal chips from the hole to maintain cooling efficiency and prevent clogging.
