Drill bit for metal GEKO HSS M35 cobalt 6.5 mm

GEKO HSS M35 cobalt drill bit 6.5 mm is engineered for drilling through a wide range of metals. Manufactured from high-speed steel with M35 cobalt alloy, this 6.5 mm bit provides increased hardness and improved heat resistance compared with standard HSS bits. It is intended for use in handheld drills and drill presses with standard three-jaw chucks and performs well when combined with appropriate cutting speeds and cooling fluids.

Advantages

The M35 cobalt composition offers higher wear resistance and longer service life when drilling abrasive or hardened materials. The 6.5 mm diameter delivers a precise, consistent hole size for fitting fasteners and creating pilot holes. Heat resistance reduces the risk of tempering and loss of hardness during prolonged use, while the ground flutes ensure reliable chip evacuation and stable cutting performance.

Suitable for

• Stainless steel and heat-treated alloyed steels
• General metalworking and fabrication
• Workshop repairs and industrial maintenance
• Pilot holes for bolts, screws, and dowels in metal components

Key specifications

• Material: High-speed steel with M35 cobalt alloy
• Diameter: 6.5 mm
• Tip and flute: Ground geometry for efficient cutting and chip removal
• Recommended use: Metal drilling including stainless and alloyed steels
• Compatibility: Standard drill chucks in handheld and bench drills

How to use

Secure the drill bit in a properly tightened three-jaw chuck and set the drill to an appropriate speed for the workpiece material — slower speeds for stainless and hardened steels, higher speeds for softer metals. Use cutting fluid or coolant to reduce heat buildup and extend tool life. Apply steady, even feed pressure and avoid excessive side loads. For best results, peck drilling or intermittent withdrawal of the bit helps clear chips and maintain cutting efficiency.

Usage recommendations

Always wear appropriate personal protective equipment, clamp the workpiece securely, and select cutting speed and coolant compatible with the metal being drilled. Re-sharpen or replace the bit when wear or chipping affects hole quality.