Bosch HSS Cobalt Drill Bit 8mm

It's designed for hard metals such as steel, cast iron, and stainless steel, with good performance in tough plastics. It can also handle wood and general plastics, but for metalworking tasks the bit excels due to its cobalt alloy composition.

Diameter: 8mm; Material: High-Speed Steel (HSS) with cobalt alloy coating; Features a precision-ground tip for accuracy; Enhanced heat resistance for sustained performance; designed for metalworking and long-lasting sharpness.

Mark the hole, secure the workpiece, and use a pilot hole if drilling hard metal. Start with a slower speed suitable for metal and apply steady, even pressure. Use cutting fluid or coolant to reduce heat, and back off if the bit binds to clear chips and prevent bit breakage.

This bit has a round shank that fits most standard drill chucks. Insert into the chuck, tighten securely, and avoid forcing the bit. Choose a speed appropriate for metal drilling, and start drilling with light pressure, gradually increasing as needed.

Wear safety glasses and gloves, secure the workpiece with clamps, and keep hands away from the rotating bit. Use proper cutting fluid to reduce heat, maintain a clean workspace, and inspect the bit for wear before use to prevent breakage.

Cobalt alloy improves heat resistance and wear resistance, allowing longer life and better performance when drilling hard materials. It minimizes bit dulling and maintains sharpness longer under high-heat conditions.

Ideal for metalworking tasks such as drilling through steel, stainless steel, and cast iron in fabrication, construction, automotive repairs, and maintenance. It can also support tougher plastic and wood drilling where higher durability is beneficial.

Smaller diameters (e.g., 6mm) cut faster but create smaller holes and may wear differently under heavy loads; larger diameters (e.g., 10mm) handle bigger holes with similar cobalt performance. For reference, see the 6mm and 10mm Bosch HSS cobalt drill bits on Fepy: https://fepy.com/product/bosch-hss-cobalt-drill-bit-6mm and https://fepy.com/product/bosch-hss-cobalt-drill-bit-10mm

Avoid overheating by using appropriate speeds and cutting fluids, drill gradually rather than forcing the bit, keep chips cleared, wipe and dry after use, and store in a dry place. If the bit dulls, use a proper drill bit sharpener or have it professionally sharpened to restore performance.

Projects involving drilling hard metals such as steel or stainless steel, fabrication tasks, automotive repairs, and heavy-duty metalworking where tool longevity and heat resistance are important will benefit most from this bit.

Yes, items can typically be returned if unused and in original packaging within the specified return window. If you need to initiate a return, please follow the applicable process for unopened items within the allowed timeframe.