Drill bit Bosch 4 mm HSS model 2608522477 for metal and general-purpose drilling

Bosch 4 mm HSS drill bit model 2608522477 is designed for metal and general-purpose drilling. Manufactured from high-speed steel (HSS), this 4 mm diameter bit delivers durable cutting performance for routine workshop tasks, repairs and light fabrication. It is suitable for use with both handheld and stationary drills and is intended for creating clean, precise holes in a variety of metal types and common construction materials.

Advantages

The HSS construction provides heat resistance and sustained edge retention during standard drilling operations. Its 4 mm diameter makes it well suited to precision work where small holes are required. The bit’s geometry is optimized for effective chip evacuation and straight drilling, reducing wobble and improving hole quality in thin to moderately thick metal sheets and similar materials. The product is compatible with common drill chucks and mounting systems used in both portable and bench drills.

Suitable for

• Drilling holes in mild steel and non-ferrous metals
• Workshop repairs and maintenance
• Light fabrication and assembly tasks
• Use with handheld drills and drill presses for small-diameter holes

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 4 mm
• Intended use: Metal and general-purpose drilling
• Compatibility: Standard drill chucks (handheld and bench drills)
• Suitable thickness range: thin to medium metal sheets and common construction materials

How to use

Select an appropriate drill and secure the bit in the chuck, ensuring it is centered and tightened. Mark and, if needed, center-punch the drilling location to prevent walking. Use a steady feed rate and moderate speed suitable for HSS bits when drilling metal; apply cutting fluid for improved lubrication and cooling on harder or thicker materials. After drilling, retract the bit while the drill is running briefly to clear chips, then stop and inspect the hole. Store the bit in a protective case or rack to preserve the cutting edge.

Usage recommendations

Use medium spindle speeds for most mild steels and lower speeds with increased lubrication for harder alloys. For more accurate results when drilling thin metal, support the workpiece to prevent distortion and consider using a pilot hole for larger operations. Regularly check the bit for wear and replace when blunting reduces hole quality.