Drill bit GEKO HSS cobalt for metal 7.5 mm, model G37075

GEKO HSS cobalt drill bit for metal, 7.5 mm diameter (model G37075) is a high-speed steel cutting tool alloyed with cobalt and engineered for drilling steel and other hard metals. The 7.5 mm diameter provides a balance between rigidity and penetration for through-holes and accurate pilot holes. The cobalt alloy increases heat resistance and wear life compared with standard HSS, making this drill bit suitable for repeated metalworking tasks in workshops, maintenance, and light industrial environments.

Advantages

The cobalt-alloy composition improves hardness at elevated temperatures, reducing edge softening during prolonged use and allowing higher cutting speeds. The geometry and material together deliver consistent hole diameter and extended service life when machining stainless steel, alloyed steels and other tough ferrous materials. The 7.5 mm size offers stable centering and reduced deflection for more precise drilling results.

Suitable for

• Drilling through mild and stainless steel
• Maintenance and repair operations requiring precise metal holes
• Workshop and production tasks where heat-resistant bits are needed
• Pilot holes and through-holes in medium-thickness metal sheets and plates

Key specifications

• Material: high-speed steel (HSS) with cobalt alloy
• Diameter: 7.5 mm
• Intended use: metal drilling, including hard and stainless steels
• Shank type: straight cylindrical shank suitable for standard chucks
• Flute design: two-flute twist geometry for chip evacuation

How to use

Secure the drill bit in an appropriate drill chuck ensuring correct centring and firm clamping. Mark and, if necessary, centre-punch the workpiece to prevent wandering. Use cutting fluid or coolant when drilling stainless or hardened steels to reduce heat build-up and prolong tool life. Start at low speed to establish the hole, then increase speed according to material hardness and machine capability. Apply steady, moderate feed pressure; avoid excessive force which can cause bending or breakage. Retract occasionally to clear chips when drilling deep holes.

Usage recommendations

For best results on stainless and high-alloy steels, use a compatible cutting fluid, maintain appropriate drill speeds (lower for harder materials), and store the bit in a dry place to prevent corrosion. Replace the bit when worn or when hole accuracy degrades to maintain consistent drilling quality.