Drill bit GEKO cobalt HSS for metal 2.5 mm, model G37025

The GEKO cobalt HSS drill bit for metal 2.5 mm (model G37025) is a precision twist drill intended for creating small-diameter holes in ferrous and non-ferrous metals. Made from high-speed steel with added cobalt, the bit provides increased hardness and improved heat resistance compared with standard HSS drills. Its geometry and finish are suited for use in both hand-held drills and machine drilling setups in workshops and industrial environments where accurate, repeatable holes are required.

Advantages

The cobalt alloy enhances wear resistance and maintains cutting edge hardness at higher temperatures, reducing the risk of premature dulling during prolonged drilling in steel and other tough alloys. The 2.5 mm diameter offers a balance between precision and durability for small fastener and pilot-hole applications. The twist-flute design promotes efficient chip evacuation and stable drilling performance when combined with appropriate speeds and lubrication.

Suitable for

• Drilling small-diameter holes in steel and stainless steel
• Creating pilot holes for tapping and fasteners
• Workshop and industrial machine drilling
• Hand-held drilling with controlled speed and clamping

Key specifications

• Material: high-speed steel with cobalt alloy
• Diameter: 2.5 mm
• Tip and flute type: twist drill geometry for metal
• Intended use: metal drilling including ferrous alloys
• Compatibility: suitable for use in hand-held drills and drill presses

How to use

Secure the workpiece to prevent movement and select an appropriate cutting speed for a 2.5 mm cobalt HSS drill in metal — lower speeds are generally recommended for harder steels. Apply cutting fluid or lubricant to the drill point and the work area to reduce heat and improve chip flow. Start drilling with a steady, moderate feed pressure, withdrawing periodically to clear chips if necessary. Keep the drill aligned with the intended hole axis to ensure accuracy and extend tool life.

Usage recommendations

Use a drill press or a well-supported hand-held drill and clamp the workpiece; employ cutting fluid for prolonged drilling and when working with stainless or hard alloys to preserve cutting edge life and maintain hole quality.