Twist Drill Bits Cobalt Bosch 2608585892 4-12mm

Twist Drill Bits Cobalt Bosch 2608585892 4-12mm are high-speed steel (HSS) drill bits with 5% cobalt content designed for drilling in a wide range of metals. Made to DIN 338 with a cylindrical shank equal to the drill diameter, these fully ground bits have a split-point 135° tip and h8 diameter tolerance to provide precise centring and reduced wandering. Two cutters and two flutes enable fast chip removal and improved wear resistance, making the set suitable for drill stands and drill drivers.

Advantages

The cobalt alloy and fully ground HSS construction deliver increased heat resistance, higher wear resistance and longer tool life when working with stainless and alloyed steels. The split-point 135° geometry ensures active cutting and accurate positioning without pre‑centring, while the two-flute design evacuates chips efficiently to maintain cutting performance.

Suitable for

• Drilling stainless steel and alloyed steels
• Drilling non-alloyed steel and cast iron
• Work in drill stands and handheld drill drivers
• General metalworking tasks requiring diameters from 4 mm to 12 mm

Key specifications

• Brand: Bosch
• MPN: 2608585892
• EAN: 3165140521277
• Material: HSS with 5% cobalt
• Standard: DIN 338
• Tip: Split-point, 135°
• Shank: Cylindrical (shank = drill diameter)
• Tolerance: h8
• Flutes: 2
• Diameter range: 4–12 mm

How to use

Select the appropriate diameter for the required hole and secure the bit in a drill stand or drill driver with a matching chuck. Use suitable cutting speed and cutting fluid when drilling stainless or alloyed steels to reduce heat buildup. Apply steady feed pressure; avoid excessive force that can cause bit overheating. For best results with the split-point tip, start drilling at low speed until the bit has established the centre, then increase speed as needed.

Usage recommendations

For prolonged tool life and consistent hole quality, use cutting fluid when working with stainless and heat-resistant steels, maintain appropriate speeds for the chosen diameter and material, and replace bits when wear or chipping affects cutting performance.