Drill Bit MILWAUKEE HSS-G CO 12.0 mm

MILWAUKEE HSS-G CO 12.0 mm is a high-speed steel drill bit with added cobalt for improved heat resistance and wear life. Designed for drilling into metal, steel and other hard materials, this 12.0 mm diameter bit is suited for workshop, maintenance and production environments. The bit features a ground flute geometry typical of HSS-G tooling for reliable chip evacuation and consistent hole quality when used in standard drill chucks.

Advantages

The cobalt-enhanced HSS formulation increases hardness at elevated temperatures, reducing wear during prolonged or high-speed drilling. Precision ground flutes provide stable cutting performance and efficient chip removal, while the 12.0 mm diameter offers a common size for through-holes and pilot holes in metalworking. Compatibility with standard drill chucks makes the bit easy to use in handheld and bench drills without special adapters.

Suitable for

• Drilling through mild and alloy steels
• Workshop, maintenance and repair tasks
• Production and fabrication of metal components
• Use with standard corded and cordless drills

Key specifications

• Material: High-speed steel with cobalt alloy
• Diameter: 12.0 mm
• Flute type: Precision ground flute
• Intended materials: Metal, steel and other hard materials
• Shank: Round shank compatible with standard drill chucks

How to use

Secure the drill bit in a properly tightened standard drill chuck. Select an appropriate drill speed and feed rate for the material being drilled—lower speeds for harder alloys and increased speeds for softer metals—while using steady pressure to avoid bit walking. Apply cutting fluid or coolant when drilling steel or other heat-sensitive materials to extend tool life and improve hole finish. Clear chips periodically to maintain efficient cutting and prevent clogging of the flutes.

Usage recommendations

For best results, begin with a smaller pilot hole when drilling large or very hard workpieces, and use appropriate protective equipment. Replace the bit when wear or chipping affects hole accuracy or increases cutting forces.