Twist Drill Bits Cobalt Sets Bosch 2608587014

Twist Drill Bits Cobalt Sets Bosch 2608587014 are high-speed steel (HSS) twist drills containing 5% cobalt, designed for durable and precise drilling in a range of metals. Fully ground to DIN 338 and featuring a cylindrical shank matching the drill diameter, these bits deliver good surface quality, wear resistance and heat protection for demanding drilling tasks. The split-point 135° tip and Type N flute geometry ensure accurate centring and reduced walking.

Advantages

The cobalt alloy (5%) combined with fully ground HSS construction provides extended tool life and improved heat resistance compared with standard HSS bits. Two cutting lips and two flutes enable efficient chip evacuation, reducing clogging and wear. A cylindrical shank and h8 diameter tolerance support stable clamping in drill stands and hand-held drivers, while the 135° split point gives fast penetration and precise positioning.

Suitable for

• Alloyed and non-alloyed steels
• Stainless steel and acid- or heat-resistant steels
• Cast iron and cast steel
• General metalworking and maintenance drilling

Key specifications

• Brand: Bosch
• Model / MPN: 2608587014
• Material: HSS with 5% cobalt
• Standard: DIN 338
• Flute type: Type N (two flutes)
• Tip angle: 135° split point
• Shank: Cylindrical (shank diameter = drill diameter)
• Tolerance: h8
• EAN: 3165140689786

How to use

Secure the appropriate size cobalt HSS twist drill in a drill stand or a drill driver with a matching chuck, ensuring the cylindrical shank seats fully. Use recommended cutting speeds and coolant or cutting oil when drilling stainless or heat-resistant steels to reduce heat build-up. Apply steady feed pressure; allow the drill to clear chips frequently to maintain cutting efficiency. Finish holes by withdrawing the bit periodically to remove chips and check progress.

Usage recommendations

For best results when drilling stainless or alloyed steels, use moderate cutting speeds, a suitable cutting fluid and steady feed. Re-sharpen or replace worn bits to maintain accuracy; avoid excessive side forces that can cause breakage.