ALPEN HSS Cobalt Twist Drill Bit, 4x75mm, DIN 338 RN, 3-Flat Shank

The ALPEN HSS Cobalt twist drill bit is a high-performance industrial tool engineered for precision drilling in demanding materials. With a diameter of 4mm and a total length of 75mm, this drill bit is manufactured from high-quality cobalt-alloyed steel, providing exceptional heat resistance and structural integrity during intensive use. The inclusion of a 3-flat shank ensures a secure, slip-free grip in standard drill chucks, enhancing stability and accuracy during operation.

Advantages

The primary advantage of this drill bit lies in its cobalt-alloyed composition, which significantly extends the tool's lifespan and maintains sharpness even when working with hardened materials. The 3-flat shank design prevents the bit from rotating within the chuck, allowing for safer and more efficient drilling. Furthermore, the short-series construction according to DIN 338 RN standards provides increased rigidity, reducing the risk of breakage and ensuring clean, precise holes in metal surfaces.

Suitable for

• Drilling into stainless steel and acid-resistant steel
• Working with alloyed and unalloyed cast iron
• General metalworking and industrial fabrication
• Precision drilling in hard steel alloys

When it may not be suitable

This drill bit is specifically optimized for metalworking and may not be the most efficient choice for drilling into soft materials like wood or plastics, where high-speed steel bits without cobalt content might be more cost-effective. It is also not intended for masonry or concrete applications, as the cutting geometry is not designed for impact or abrasive materials.

Key specifications

• Diameter: 4mm
• Total length: 75mm
• Material: Cobalt-alloyed high-speed steel
• Shank type: 3-flat shank
• Standard: DIN 338 RN

How to use

To achieve the best results, ensure the drill bit is securely fastened in the chuck, aligning the flat surfaces of the shank with the chuck jaws. Begin drilling at a low speed with consistent, moderate pressure to allow the cobalt-alloyed edges to cut effectively without overheating. Using a suitable cutting oil or lubricant is highly recommended to dissipate heat and extend the life of the drill bit, especially when working with stainless steel.

What to consider before purchase

• Verify the chuck capacity of your power tool to ensure compatibility with the 3-flat shank.
• Assess the hardness of the material you intend to drill to ensure this cobalt bit is the correct tool for the task.
• Consider purchasing a set if you require multiple sizes for varied metalworking projects.

Usage recommendations

Always wear appropriate eye protection and secure the workpiece firmly before starting the drilling process to prevent movement and ensure operator safety.