KWB 248668 HSS Twist Drill Bit 6.8 mm

The KWB 248668 HSS twist drill bit is a precision-engineered tool designed for high-performance drilling in demanding materials. With a diameter of 6.8 mm, this drill bit is manufactured to DIN 338 standards and features a robust 5% cobalt alloy construction, ensuring exceptional durability and heat resistance during intensive use. The precision-ground design and 135-degree tip angle with cross-grinding allow for excellent self-centering capabilities, preventing the bit from wandering on the workpiece surface.

Advantages

This drill bit offers superior performance due to its high-quality cobalt alloy, which maintains its hardness even at elevated temperatures, making it ideal for drilling into tough and heat-sensitive materials. The cross-ground tip geometry significantly reduces the feed pressure required, leading to cleaner hole formation and increased efficiency. Its industrial-grade construction ensures a long service life and consistent results, providing reliability for both professional metalworking environments and demanding home improvement projects.

Suitable for

• Drilling into stainless steel grades A2 and A4
• Working with alloyed and unalloyed steel
• Processing cast iron and cast steel
• Drilling into bronze and various plastics

When it may not be suitable

This drill bit is specifically optimized for metal and hard materials. It may not be the most efficient choice for drilling into softwoods or masonry, where specialized drill bits would provide better results and prevent premature wear of the cobalt edge.

Key specifications

• Diameter: 6.8 mm
• Material: 5% Cobalt alloyed HSS
• Tip angle: 135 degrees
• Standard: DIN 338
• Cut type: Right-hand, Type N
• Tip geometry: Cross-ground to DIN 1412 C
• Shank type: Cylindrical

How to use

To achieve the best results, ensure the drill bit is securely fastened in a standard drill chuck. Begin by marking the center of the hole to take advantage of the self-centering tip. Apply steady, moderate pressure and maintain a consistent rotation speed appropriate for the material being drilled. Using a suitable cutting oil is recommended when working with stainless steel or other hard metals to extend the life of the bit and improve the finish of the hole.

What to consider before purchase

• Verify that your drill chuck supports a 6.8 mm cylindrical shank.
• Ensure the material you intend to drill is compatible with cobalt-alloyed bits.
• Consider the depth of the hole, as this is a standard length drill bit.

Usage recommendations

For optimal longevity and performance, always use a cooling lubricant when drilling stainless steel or hard alloys, and avoid overheating the bit by using appropriate drilling speeds.