ALPEN HSS Cobalt Twist Drill Bit, 5x86mm, DIN 338 RN, 3-Flat Shank

The ALPEN HSS Cobalt twist drill bit is a high-performance precision tool engineered for demanding drilling tasks in hard and alloyed materials. With a diameter of 5mm and a total length of 86mm, this drill bit is manufactured to meet the rigorous DIN 338 RN standards, ensuring consistent quality and dimensional accuracy. The inclusion of a 3-flat shank design provides a superior grip within the drill chuck, effectively eliminating slippage and maximizing torque transmission during intensive drilling operations.

Advantages

This drill bit stands out due to its high cobalt content, which significantly enhances heat resistance and structural integrity when working with tough metals. The robust construction minimizes the risk of breakage, while the specialized geometry allows for efficient chip removal and reduced friction. By utilizing the 3-flat shank, users benefit from increased stability and safety, as the bit remains firmly locked in place even under high pressure. Its durability ensures a longer service life compared to standard high-speed steel bits, making it a reliable choice for continuous professional use.

Suitable for

• Drilling into stainless steel and acid-resistant steels
• Working with cast iron and alloyed steels
• General metalworking and industrial maintenance
• Precision drilling in hard materials requiring high heat tolerance

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 plastic, where standard HSS bits are often more cost-effective. It is also not intended for masonry or concrete applications, as the cutting edge is designed for metal shear rather than impact drilling.

Key specifications

• Diameter: 5mm
• Total length: 86mm
• Material: HSS Cobalt
• Standard: DIN 338 RN
• Shank type: 3-flat shank

How to use

To achieve the best results, ensure the drill bit is securely tightened in the chuck, aligning the flat surfaces with the chuck jaws. Begin drilling at a lower speed to establish a pilot point, then gradually increase the speed according to the material hardness. It is highly recommended to use a suitable cutting oil or cooling lubricant to maintain the temperature of the bit, which preserves the cutting edge and prevents overheating during deep or repetitive drilling.

What to consider before purchase

• Verify the compatibility of the 3-flat shank with your existing drill chuck
• Ensure the 5mm diameter meets your specific hole size requirements
• Consider the material hardness of your workpiece to ensure cobalt performance is necessary

Usage recommendations

Always wear appropriate eye protection and secure the workpiece firmly with clamps before starting the drilling process to ensure operator safety and hole precision.