Boor Bosch 4 mm diameter staal 2608901167

Bosch 4 mm steel drill bit is a straight-shank cutting tool purpose-built for producing accurate 4 mm holes in steel and other metal materials. The bit is suitable for routine metalworking, maintenance and assembly tasks where a durable cutting edge and precise hole diameter are required. Its design ensures compatibility with standard drill chucks and offers consistent performance for both professional and DIY applications.

Advantages

The steel construction provides wear resistance and stable cutting performance when drilling metal. The straight shank enables easy mounting in a variety of drill chucks and ensures concentric rotation for accurate hole placement. This drill bit is optimized for producing clean 4 mm holes with minimal burr formation, reducing the need for secondary finishing. Its general-purpose geometry balances cutting speed and tool life for repeated use in workshop or on-site environments.

Suitable for

• Drilling through mild and alloy steels
• Creating pilot or through holes for bolts and rivets in metal parts
• Maintenance, repair and assembly tasks on machinery and metal structures
• General metalworking in small workshops and DIY projects

Key specifications

• Diameter: 4 mm
• Material: hardened steel cutting core
• Shank type: straight shank for standard chucks
• Intended use: drilling in steel and other metals
• Hole tolerance: designed for standard 4 mm hole accuracy in metalworking

How to use

Secure the drill bit in a properly matched drill chuck, ensuring the bit is clamped concentric to the chuck axis. Use an appropriate cutting speed and feed for the specific steel grade—lower speeds and steady feed for harder alloys. Apply cutting fluid or lubricant when drilling steel to reduce heat and prolong tool life. Start with light pressure to establish the hole and then increase feed consistently until breakthrough. After drilling, remove burrs if necessary using a deburring tool or fine file.

Recommendations

For best performance, match drill speed and feed to material hardness, use cutting lubricant when drilling steel, and check chuck tightness before operation. Store the bit in a protective case to prevent damage to the cutting edges.