Súprava vrtákov Bosch HSS špirálové vrtáky Cobalt 2607019926

The Bosch HSS Twist Drill Bit Cobalt (DIN 338, MPN 2607019926) is a set of high-speed steel drill bits with 5% cobalt designed for drilling metal. Fully ground HSS and a cobalt alloy increase wear resistance and heat protection, delivering longer tool life and consistent surface quality. The bits have a cylindrical shank (shank diameter equal to drill diameter) and are suitable for use in drill stands and hand-held drill drivers.

Advantages

Fully ground HSS combined with 5% cobalt alloy provides improved hardness and thermal resistance compared with standard HSS bits, resulting in extended lifetime when drilling stainless and high-strength steels. The two-cutter geometry with two flutes ensures efficient chip evacuation and stable drilling. The split-point 135° tip (Type N flute angle) gives accurate centring and reduces walking on the workpiece, while diameter tolerance h8 ensures consistent hole sizes.

Suitable for

• Alloyed and non-alloyed steel
• Stainless steel and acid- or heat-resistant steels
• Cast iron and cast steel
• Use in drill stands and hand-held drill drivers

Key specifications

• Manufacturer: Bosch
• MPN: 2607019926
• Standard: DIN 338
• Material: Fully ground HSS with 5% cobalt
• Tip: Split-point 135° (Type N)
• Shank: Cylindrical (shank = drill diameter)
• Tolerance: h8
• Flutes/cutters: Two flutes, two cutters

How to use

Select the drill bit diameter required for the hole and fit the cylindrical shank securely in the drill chuck or drill stand. Use appropriate cutting speed and steady feed for the material being drilled; lower speeds and steady pressure are recommended for stainless and heat-resistant steels. Apply cutting fluid when drilling stainless or high-strength steels to improve cooling and chip evacuation. Retract the bit occasionally to clear chips and avoid overheating.

Recommendations

Use coolant or cutting oil when drilling stainless and acid- or heat-resistant steels, maintain moderate drilling speeds to reduce heat build-up, and ensure the drill is rigidly supported to benefit from the split-point tip and achieve accurate, long-lasting holes.