Bosch PRO Metal HSS-G Twist Drill Bit 4mm

The Bosch PRO Metal HSS-G twist drill bit with a 4mm diameter is a precision-engineered tool designed for high-performance drilling in metal. Manufactured from high-speed steel, this drill bit ensures consistent results and durability when working with various steel and alloy materials. Its geometry is optimized for efficient chip removal, which helps maintain a steady drilling speed and prevents overheating during operation.

Advantages

This drill bit stands out due to its ground-flute design, which provides superior precision and faster drilling progress compared to standard rolled bits. The HSS-G construction offers excellent heat resistance and structural integrity, ensuring that the tool maintains its sharpness over extended periods of use. Its robust design minimizes the risk of breakage, making it a reliable choice for demanding metalworking tasks that require clean, accurate holes.

Suitable for

• Drilling holes in alloyed and non-alloyed steel
• Working with cast iron and cast steel
• Precision metal fabrication tasks
• General maintenance and repair work involving metal surfaces

When it may not be suitable

This drill bit is specifically optimized for metal applications and may not perform optimally when used on masonry, concrete, or extremely hard materials like hardened steel or ceramics. It is also not intended for use in wood or plastic where specialized geometry might be required for better chip clearance.

Key specifications

• Diameter: 4mm
• Working length: 43mm
• Total length: 75mm
• Material: High-speed steel (HSS-G)
• Tip design: Standard twist drill geometry

How to use

To achieve the best results, secure your workpiece firmly to prevent vibration or movement during the drilling process. Use a center punch to mark the exact location of the hole to ensure the drill bit does not wander upon starting. Apply steady, moderate pressure and use a suitable cutting oil to lubricate the bit, which will help reduce friction and extend the life of the tool. Maintain a consistent drill speed appropriate for the material being processed.

What to consider before purchase

• Ensure the 4mm diameter matches your specific project requirements
• Check the compatibility of your drill chuck with the cylindrical shank
• Consider purchasing a set if you require multiple sizes for your project

Usage recommendations

Always wear appropriate eye protection when drilling metal to prevent injury from flying chips. Regularly inspect the drill bit for signs of wear or dullness and replace it when necessary to maintain drilling efficiency and safety.