Baildon DIN 338 RN NWKa INOX Twist Drill Bit 9 mm, HSS-E Co5

The Baildon DIN 338 RN NWKa INOX twist drill bit with a 9 mm diameter is a professional-grade cutting tool engineered for high-performance drilling in stainless steel and other challenging, high-strength alloys. Manufactured from HSS-E Co5 high-speed steel containing 5% cobalt, this drill bit provides exceptional thermal resistance and structural integrity, ensuring it maintains its cutting edge even under the intense heat generated during the machining of hard materials.

Advantages

This drill bit stands out due to its robust cobalt-alloyed composition, which significantly extends tool life compared to standard high-speed steel bits. The precision-ground geometry allows for efficient chip removal and reduced friction, leading to cleaner hole finishes and improved drilling accuracy. Its design is specifically optimized to prevent work hardening in stainless steel, making it a reliable choice for demanding industrial and workshop environments where consistency and durability are paramount.

Suitable for

• Drilling stainless steel and acid-resistant steels
• Machining high-tensile alloys and cast iron
• Industrial manufacturing and precision metalworking
• Professional workshop maintenance and repair tasks

When it may not be suitable

This drill bit is not recommended for drilling soft materials such as wood, plastic, or non-ferrous metals like aluminum, where standard HSS bits would be more cost-effective and efficient. It is also not intended for use in masonry or concrete applications.

Key specifications

• Diameter: 9 mm
• Material: HSS-E Co5 (5% cobalt high-speed steel)
• Standard: DIN 338
• Type: RN NWKa INOX

How to use

To achieve optimal results, secure the workpiece firmly to prevent vibration and ensure the drill bit is aligned perpendicularly to the surface. Use a steady, controlled feed rate and apply appropriate cutting fluid or lubricant to manage heat and extend the life of the bit. Start with a lower rotational speed, adjusting as necessary based on the material hardness, and avoid excessive pressure that could cause the bit to overheat or break.

What to consider before purchase

• Verify the chuck capacity of your drill to ensure it accommodates a 9 mm shank
• Ensure the drill press or hand drill provides sufficient torque for stainless steel applications
• Check that the material being drilled is compatible with cobalt-alloyed tools

Usage recommendations

Always wear appropriate eye protection and safety gear when drilling metal. Regularly inspect the drill bit for signs of wear or dulling to maintain precision and prevent damage to the workpiece.