Drill bit Bosch 4.0 mm HSS model 2608833819 for metal drilling

Bosch drill bit 4.0 mm HSS model 2608833819 is a high-speed steel twist drill designed for drilling metal and other hard materials. The bit produces a precise 4.0 mm hole diameter and is compatible with standard keyed or keyless drill chucks. It is intended for maintenance, metalworking, fabrication and repair tasks where a durable HSS cutting edge, straight fluting and accurate hole sizing are required.

Advantages

The HSS construction offers good hardness and heat resistance for cutting into steel, iron and other alloys. Precise diameter tolerance provides consistent hole size for fastening and assembly. The twist geometry with defined point angle facilitates centering and efficient chip evacuation, reducing the risk of workpiece damage. The shank is made to fit common drill chucks, delivering stable clamping and reduced runout during operation.

Suitable for

• Drilling through mild and hardened steels
• Metal fabrication and sheet metal work
• Maintenance and repair tasks on machinery and equipment
• Preparing holes for bolts, rivets and threaded inserts

Key specifications

• Diameter: 4.0 mm
• Material: High-speed steel (HSS)
• Type: Twist drill / straight flute geometry
• Suitable for: Metal and other hard materials
• Shank: Cylindrical shank for standard drill chucks
• Point angle: Standard for metal drilling (optimized for centering)

How to use

Select an appropriate drill speed and feed rate for the metal being drilled; lower speeds are recommended for harder alloys and larger diameters. Secure the workpiece in a vise or with clamps to prevent movement. Mark the drilling position and, if needed, create a pilot indent with a center punch to improve centering. Fit the drill bit into the chuck, tighten securely, and start drilling with steady pressure. Use cutting fluid or coolant for prolonged tool life and better chip evacuation when drilling through thicker or harder metals. Withdraw the bit periodically to clear chips if drilling deep holes.

Recommendations

For best results when drilling metal, use appropriate cutting lubricant, maintain correct spindle speed for the material, and replace the bit when wear or chipping affects hole quality. Store the drill bit in a dry container to prevent corrosion and avoid excessive side loads to maintain the cutting edge geometry.