Drill bit MILWAUKEE HSS-G CO 8.0 mm, high-speed steel, cobalt tip

MILWAUKEE HSS-G CO 8.0 mm is a high-speed steel drill bit with a cobalt-enriched tip engineered for drilling into hard and heat-resistant metals. Designed for professional and industrial use, this 8.0 mm diameter bit provides consistent cutting performance and improved wear resistance compared with standard HSS bits. It is suitable for both handheld drills and drill presses when accurate, repeatable holes in steel and other ferrous materials are required.

Advantages

The cobalt alloy at the cutting edge increases hardness and thermal stability, allowing the bit to retain sharpness under higher temperatures. Ground flute geometry provides efficient chip evacuation and smoother drilling action, reducing the risk of stuck bits and improving hole quality. The 8.0 mm diameter offers a balance between rigidity and cutting speed for medium-size holes in metalwork. The overall construction delivers longer life in demanding applications compared with plain HSS drills.

Suitable for

• Drilling through stainless steel and hardened steel components
• Metal fabrication and maintenance work
• Workshop and industrial drill press operations
• Handheld drilling where precise 8.0 mm holes in ferrous materials are required

Key specifications

• Material: high-speed steel with cobalt alloy cutting tip
• Diameter: 8.0 mm
• Flute type: ground flutes for chip removal
• Intended materials: steel and other ferrous metals, including stainless steel
• Suitable tools: handheld electric drills and drill presses
• Finish: precision-ground cutting edges for improved accuracy

How to use

Select the correct spindle speed for the workpiece material and secure the workpiece to prevent movement. Clamp the MILWAUKEE HSS-G CO 8.0 mm bit in the drill chuck with sufficient shank grip. Use cutting fluid or coolant when drilling stainless or hardened steels to reduce heat and extend tool life. Apply steady, moderate feed pressure; avoid excessive force that can cause bit breakage or workpiece deformation. Withdraw the bit periodically to clear chips when drilling deep holes.

Usage recommendations

For best results, match rotational speed and feed to the specific steel grade, use appropriate coolant for stainless or heat-treated materials, and replace the bit when wear visibly affects hole quality. Store the drill bit dry and protected to prevent corrosion and preserve cutting performance.