Bosch Professional HSS-Co Metal Twist Drill Bit 4mm DIN 338 Gold

Summary

The Bosch Professional HSS-Co Twist Drill Bit (2608585846) is a 4 mm cobalt-alloyed high-speed steel drill bit engineered for demanding metal drilling applications. It is ideal for trade professionals and installers who need reliable, long-lasting performance when working with hard or abrasive metals including stainless steel. Manufactured to DIN 338 standard, it delivers consistent accuracy and extended tool life.

Features

• Manufactured from cobalt-alloyed HSS (HSS-Co) for exceptional heat and wear resistance - particularly when drilling stainless steel and hard alloys.
• Fully ground construction ensures precise geometry and consistent diameter tolerance throughout the bit's life.
• 135deg split-point tip provides active centring and eliminates wandering when starting a hole, reducing the need for a centre punch.
• Two cutting edges and two flutes work together to evacuate chips rapidly, reducing heat build-up and extending bit life.
• Suitable for alloyed and non-alloyed steel up to 1000 N/mm2 tensile strength, stainless steel V2A/V4A, cast steel, cast iron, and acid/heat-resistant steels.
• Type N flute geometry (standard helix) and h8 diameter tolerance for broad compatibility across metal types.
• Cylindrical shank equal to drill diameter - compatible with standard three-jaw drill chucks.
• Well-suited for use in pillar drills and drill stands where precision and repeatability are required.

Specifications

• Part Number: 2608585846
• Diameter: 4 mm
• Flute Length: 43 mm
• Overall Length: 75 mm
• Material: HSS-Co (Cobalt High Speed Steel)
• Standard: DIN 338
• Tip Angle: 135deg
• Flute Type: Type N
• Diameter Tolerance: h8
• Shank: Cylindrical (equal to drill diameter)
• Finish: Gold

What's Included

• 1 x Bosch HSS-Co Twist Drill Bit, 4 mm (2608585846)