Twist Drill Bits Ground Bosch 2608585929

HSS Twist Drill Bits Ground Bosch 2608585929 are high-speed steel drill bits designed for precise metal drilling. The bits have a precision-ground, 135° self-centring split-point tip that reduces wandering and removes the need for pre-punching or pilot drilling for holes up to 10 mm. Manufactured to DIN 338 with Type N flute geometry and h8 diameter tolerance, these cylindrical-shank drills are intended for use in drill stands and drill drivers and deliver improved cutting performance with lower feed pressure compared with standard-ground HSS bits.

Advantages

The split-point 135° tip provides accurate centring and starts cutting immediately, eliminating walking and reducing the need for pilot holes up to 10 mm. Precision ground from HSS increases drilling speed (up to 40% faster) and lowers feed pressure (up to 50%) versus chisel-edge HSS drills. Compliance with DIN 338 and h8 tolerance ensures consistent hole dimensions, while the cylindrical shank allows use in drill stands and hand drills.

Suitable for

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

Key specifications

• Brand: Bosch
• MPN: 2608585929
• Material: High-speed steel (HSS)
• Tip: 135° self-centring split point
• Flute type: Type N
• Standard: DIN 338
• Shank: cylindrical (diameter = drill size)
• Diameter tolerance: h8
• EAN: 3165140521642

How to use

Select the appropriate diameter for the required hole and secure the bit in the chuck so the cylindrical shank is clamped firmly. Mark the drilling position; for holes up to 10 mm a pilot hole is usually not required due to the split-point tip. Start drilling at low speed to ensure correct centring, then increase speed and feed steadily while applying moderate pressure. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and improve chip evacuation. After use, clean chips from flutes and store bits in a protective case.

Usage recommendations

For best results when drilling hardened or abrasive materials, use suitable cutting lubricant and moderate speed. Replace worn bits to maintain hole quality and adherence to tolerance h8; avoid excessive side pressure to prevent bit breakage.