Twist Drill Bits Bosch 2608585942 HSS Ground 1.5-10mm

Twist Drill Bits Bosch 2608585942 HSS Ground 1.5-10mm are precision-ground high-speed steel (HSS) drill bits designed for accurate metal drilling. Manufactured to DIN 338 and featuring a cylindrical shank equal to the drill diameter, these Type N bits have a 135° self-centring split-point tip that reduces wandering and often removes the need for pre-punching or pilot drilling for diameters up to 10 mm. The ground HSS geometry provides higher drilling speed and lower feed pressure compared with standard chisel-edged HSS bits.

Advantages

The 135° split-point tip ensures fast centring and reduces walking, enabling clean starts without pilot holes for many applications. The precision-ground flute and cutting edges, made from high-speed steel, offer up to 40% faster drilling and up to 50% lower feed pressure versus conventional HSS drills with chisel edges. The cylindrical shank allows use in drill stands and handheld drill drivers, and the DIN 338 manufacturing standard ensures consistent diameter tolerance (h8) and repeatable performance.

Suitable for

• Drilling in alloyed and non-alloyed steel
• Holes in cast steel, cast iron and sintered iron
• Working with malleable cast iron and non-ferrous metals
• Piercing hard plastics

Key specifications

• Brand: Bosch
• MPN: 2608585942
• EAN: 3165140521772
• Material: HSS (high-speed steel)
• Diameter range: 1.5–10 mm
• Tip angle: 135° split-point, self-centring
• Flute type: Type N (standard flute angle)
• Shank: cylindrical (shank diameter = drill diameter)
• Standard: manufactured to DIN 338
• Diameter tolerance: h8

How to use

Select the appropriate drill diameter for the required hole and secure the workpiece. Fit the cylindrical shank into a compatible drill chuck or drill stand. For metal drilling, use suitable cutting fluid or coolant to extend tool life and improve chip evacuation. Start at low speed to allow the split-point tip to self-centre, then increase speed according to material and diameter. Apply steady, even feed pressure; the ground HSS geometry typically requires lower feed than standard HSS bits.

Recommendations

For best results when drilling hardened or abrasive materials, use appropriate cutting fluid and avoid excessive heat build-up. Replace bits that show excessive wear or chipping to maintain hole quality and safety.