HSS / HSSE NC-Center drills 90°, 120°
NC spot drills for precise spot drilling of workpieces
In industrial mass production, CNC and NC machines are commonly used. To ensure high precision when spot drilling for threaded holes or other types of bores, the drill bit must be accurately positioned on the workpiece. However, standard twist drills and metal drills often tend to drift. While center drills are typically used for pre-drilling in manual applications, specialized NC spot drills have proven effective for machine-based NC production. These drills differ from center drills at first glance by the absence of a centering point, which is unnecessary when machine tools offer very high geometric rigidity. This is generally the case with NC machines and milling machines in machining centers and industrial production. Numerically controlled machines do not require a center drill but instead use an NC spot drill. This also shortens the spot drilling paths in mass production processes. However, NC spot drills are not suited for deep drilling, as they lack the necessary guide chamfers and are generally very short in length. An NC spot drill is used primarily for centering and countersinking stable and precise bores on milling machines, boring mills, and NC machines.
NC spot drills in HSS and HSSE versions from Nachreiner
Our range includes NC spot drills for NC machines in various sizes and versions. While HSS spot drills are suitable for most common applications, we also offer HSSE variants for high-strength steels and other robust materials. These HSSE drills contain a five percent cobalt alloy that provides greater strength and typically longer tool life under normal conditions. The ideal version for your needs depends on the materials being drilled. With HSSE, for example, you can drill alloyed and unalloyed steels with higher strength, as well as other alloyed and unalloyed metals and certain plastics.
Choosing the right tip angle for spot drill sets
Our range also includes complete NC spot drill sets. Besides the diameter, it is essential to consider the correct tip angle. In NC applications, the most common tip angles are 90 or 120 degrees. If you require specialized versions or specific coatings for working with particular materials, we can provide custom solutions upon request. Please contact us directly so we can understand your specifications and offer you an appropriate proposal.
Applications for Nachreiner NC spot drills
Our precise spot drills are commonly used in industrial manufacturing standard procedures, such as:
- Spot drilling and countersinking for threads
- Centering and spot drilling for twist drills
- Use on NC machines, boring mills, or milling machines
Advantage: With an NC spot drill, you can drill directly into solid material, allowing CNC and NC machines to bypass the need for countersinking with a conical countersink in most cases. This is primarily due to the 90 or 120-degree tip design of the spot drill.