Drill bit for metal GEKO T03030 HSS M35 3 mm

Drill bit for metal GEKO T03030 HSS M35 3 mm is a straight shank metalworking drill designed for accurate hole-making in ferrous and non-ferrous metals. Manufactured from M35 high-speed steel with cobalt alloy, this 3 mm diameter bit offers improved heat resistance and extended tool life compared with standard HSS drills. It is suitable for use in both hand-held drills and drill presses in workshops, maintenance operations and metal fabrication environments.

Advantages

The M35 cobalt alloy construction increases red hardness and wear resistance, allowing drilling at higher temperatures and under heavier loads. The straight shank fits conventional drill chucks securely for stable rotation. A 3 mm diameter provides precise, small-diameter holes with reduced walking when properly centered. The combination of material and geometry ensures balanced cutting performance and longer service intervals.

Suitable for

• Drilling holes in steel and cast iron
• Drilling in stainless steel and other hard alloys
• Working with aluminium, brass and copper
• Maintenance, repair and workshop fabrication tasks
• Use in hand-held drills and bench drill presses

Key specifications

• Material: high-speed steel with cobalt alloy (M35)
• Diameter: 3 mm
• Shank type: straight shank for standard chucks
• Intended materials: ferrous and non-ferrous metals
• Typical applications: general metal drilling, maintenance and fabrication

How to use

Select an appropriate drilling speed and apply cutting fluid when drilling tougher alloys or stainless steel to reduce heat and improve chip evacuation. Secure the workpiece with clamps or a vise to prevent movement, and align the drill bit accurately using a center punch for precise starts. Use steady feed pressure and avoid excessive force; back the drill out occasionally to clear chips when drilling deeper holes. After use, clean any coolant or swarf from the bit and store it in a protective case or bit holder to maintain tip geometry.

Usage recommendations

For best results, use lower speeds and a suitable cutting lubricant when machining stainless steel or hardened materials. Replace the bit if the cutting edge shows significant wear or chipping to maintain hole quality. When drilling multiple holes, periodically reapply coolant and inspect the bit for overheating signs.