Drill bit set Bosch 19 pcs HSS-Co DIN 338 for metal, sizes 1–10 mm

Bosch 19-piece drill bit set HSS-Co DIN 338 for metal contains precision ground twist drills in sizes from 1 mm to 10 mm. Manufactured to DIN 338 standards from high-speed steel with cobalt (HSS-Co), these bits are intended for drilling steel and other ferrous materials. The set is suitable for workshop use and professional applications and can be used in hand drills and drill presses where higher heat resistance and extended tool life are required.

Advantages

The HSS-Co composition increases hardness and maintains cutting performance at elevated temperatures, reducing wear during prolonged drilling in metal. Precision DIN 338 geometry permits consistent hole quality and efficient chip evacuation. The 19-piece range covers a continuous set of sizes from 1 mm to 10 mm, eliminating the need for frequent tool changes. Compatibility with standard drill chucks makes the set convenient for both stationary and portable drilling equipment.

Suitable for

• Drilling mild and alloyed steels
• Workshop production and maintenance tasks
• Hand-held drills and drill presses
• Creating pilot holes and through-holes in ferrous materials

Key specifications

• Material: High-speed steel with cobalt (HSS-Co)
• Standard: DIN 338 (twist drill geometry)
• Number of pieces: 19
• Drill sizes: 1.0 mm to 10.0 mm (continuous range)
• Intended use: Metal / ferrous materials
• Suitable for: Hand drills and drill presses

How to use

Select the correct drill diameter for the required hole and secure the drill bit in the drill chuck according to the drill manufacturer's instructions. Use appropriate cutting speed and feed for the material being drilled; lower speeds and steady feed are recommended for larger diameters and harder steels. Apply cutting fluid or lubricant to reduce heat buildup and extend bit life when drilling steel. Maintain stable workpiece clamping and clear chips from the hole periodically to avoid clogging and overheating.

Usage recommendations

For best results when drilling steel, use a pilot drill for large hole diameters, keep cutting speed moderate, and use a suitable cutting fluid. Inspect drill bits for wear and replace if the cutting edge becomes dull or chipped to maintain hole quality and reduce the risk of breakage.