Bosch PRO Metal HSS-G Spiral Drill Bit 3mm

The Bosch PRO Metal HSS-G spiral drill bit with a 3mm diameter is a precision-engineered tool designed for high-performance drilling in various metal materials. Manufactured from high-speed steel, this drill bit ensures consistent results and structural integrity when working with steel, cast iron, and non-ferrous metals. Its spiral design facilitates efficient chip removal, preventing overheating and ensuring smooth operation during repetitive drilling tasks.

Advantages

This drill bit stands out due to its ground-flute design, which provides exceptional cutting speed and accuracy compared to standard rolled bits. The HSS-G construction offers superior heat resistance and durability, allowing for a longer service life even under demanding professional conditions. Its precise geometry ensures that holes are clean and burr-free, reducing the need for secondary finishing work.

Suitable for

• Drilling precise 3mm holes in alloyed and non-alloyed steel
• Working with cast iron and malleable cast iron
• Applications in metal fabrication and mechanical engineering
• General maintenance and repair tasks involving metal surfaces

When it may not be suitable

This drill bit is specifically optimized for metalworking and may experience premature wear if used on abrasive materials like masonry, concrete, or hardened ceramics. It is also not intended for use on soft materials like wood or plastic where specialized geometry is required for optimal chip clearance.

Key specifications

• Diameter: 3mm
• Material: High-speed steel (HSS-G)
• Working length: 33mm
• Total length: 61mm
• Design: Spiral flute

How to use

To achieve the best results, secure the workpiece firmly to prevent vibration or movement during the drilling process. Use a suitable power drill or drill press, ensuring the bit is correctly centered. Apply steady, moderate pressure and use a cutting oil or lubricant to reduce friction and heat buildup, which will significantly extend the life of the drill bit. Always start at a lower speed and increase as necessary, ensuring the drill remains perpendicular to the surface.

What to consider before purchase

• Verify that your drill chuck is compatible with a 3mm shank diameter
• Ensure the material hardness is within the recommended range for HSS-G bits
• Consider the depth of the hole required relative to the 33mm working length

Usage recommendations

For optimal performance and longevity, always maintain a consistent feed rate and use appropriate cooling lubricants when drilling into hard metals to prevent the bit from overheating and losing its edge.