Drill bit GEKO cobalt HSS for metal 8 mm - G37080

Drill bit GEKO cobalt HSS for metal 8 mm is a precision ground high-speed steel drill designed for creating clean 8 mm holes in steel and other hard alloys. The addition of cobalt increases hot hardness and wear resistance, allowing the bit to retain cutting performance under higher temperatures and heavier use. Its geometry and shank size make it compatible with standard chucks on hand drills and drill presses, providing consistent results in workshop and maintenance environments.

Advantages

The cobalt-enhanced HSS composition ensures improved heat resistance and longer tool life compared with standard HSS bits. Precision ground flutes and point geometry deliver accurate centring and smooth chip evacuation, reducing the risk of workpiece damage. The 8 mm diameter provides a common, versatile size for through-holes and pilot holes in metalworking tasks, while compatibility with common drill chucks simplifies tool changes.

Suitable for / Применение / Izmantošana

• Drilling steel, stainless steel and other tough metal alloys
• Workshop drilling, maintenance and repair tasks
• Use in hand drills and drill presses for precise 8 mm holes

Key specifications

• Material: high-speed steel with cobalt for increased hot hardness
• Diameter: 8 mm
• Tip type: precision ground split or standard point geometry for accurate centring
• Flute: spiral flutes for efficient chip removal
• Shank: round shank suitable for standard drill chucks

How to use

Mark the drilling position and secure the workpiece in a vice or with clamps. Select an appropriate cutting speed and feed for the metal being drilled; lower speeds for harder alloys and stainless steels help preserve bit life. Use cutting fluid or lubricant when drilling to reduce heat and improve chip evacuation. Start drilling with light pressure to establish the centre, then apply steady pressure while allowing the drill to cut without forcing it. Withdraw periodically to clear chips if drilling deep holes.

Usage recommendations

For best results, pair the drill bit with appropriate cutting lubricant and a correctly adjusted drill press or steady hand drill. Replace the bit when wear degrades cutting performance or when chipping of the cutting edge is visible. Store in a dry place to avoid corrosion.