Twist drill bit Bosch HSS-Co DIN 338 3 mm

The Bosch HSS-Co DIN 338 twist drill bit with a 3 mm diameter is a high-speed steel alloy drill designed for metalworking. Manufactured to DIN 338 with 5% cobalt content, the bit features a 135° split point tip made to DIN 1412 C and is ground from solid material to factory standards. The shank matches the drill diameter and the bit has a bronze finish. This product is supplied as a set of ten identical 3 mm HSS-Co bits for professional and DIY metal drilling tasks.

Advantages

These HSS-Co drill bits combine cobalt alloy for improved heat resistance and wear performance with a split point 135° tip for fast centre starting and reduced walking. Ground from solid metal, they offer consistent surface quality and precision within diameter tolerance h8. The straight cylindrical shank and two-flute geometry ensure reliable chip evacuation and stable drilling in a variety of metals.

Suitable for

• Drilling holes in steel and alloyed metals
• General metal fabrication and maintenance work
• Use in hand-held drills and drill presses where a 3 mm shank is supported
• Professional workshops and hobbyist metalworking projects

Key specifications

• Brand: Bosch
• Type: Twist drill bit, HSS-Co (5% cobalt)
• Standard: DIN 338 (body) and DIN 1412 C (split point tip)
• Diameter: 3 mm
• Tip angle: 135° split point
• Flutes: 2 (two-cutter, cylindrical)
• Shank: equal to drill diameter (straight)
• Finish: bronze-coloured
• Tolerance: h8
• Package quantity: 10 pieces
• MPN: 2608585876
• EAN: 3165140521116

How to use

Secure the 3 mm HSS-Co drill bit in the chuck so the shank is held firmly and run the drill at a speed appropriate for the metal being drilled. Apply steady feed pressure and maintain alignment to avoid bending the small-diameter bit. For best results in metal, use cutting oil during drilling to reduce heat and prolong tool life; Bosch recommends the universal cutting oil 2 607 001 409 for HSS-Co bits.

Recommendations

Use the recommended cutting oil when drilling metals, keep cutting speeds and feed rates suitable for the workpiece material, and replace bits showing excessive wear or chipping to maintain hole quality and operator safety.