Drill Bit Set Bosch 2609255040 3.5 mm Diameter 70 mm Length 2 pcs

Bosch 2609255040 drill bit set contains two precision-ground twist drill bits with a 3.5 mm diameter and 70 mm overall length. Made of high-speed steel ground from solid material, these right-hand cutting bits are designed for general-purpose drilling and offer a high drilling rate and good wear resistance. The set is suitable for drilling in various metals and hard plastics; using coolant during operation is recommended.

Advantages

Precision ground from solid high-speed steel for consistent hole quality and long tool life. Right-hand cutting geometry provides efficient chip removal and stable drilling. Universal cutting capabilities make the bits suitable for a wide range of materials, and the two-piece set offers quick replacement or spare availability on the job.

Suitable for

Key specifications

How to use

Secure the drill bit in the drill chuck, ensuring proper centering and clamping. Select an appropriate drill speed and apply steady, moderate feed pressure. For metals and hard plastics use recommended coolant or cutting fluid to reduce heat, improve chip evacuation and extend bit life. Retract periodically for deep holes to clear chips and avoid clogging.

Recommendations

Use cutting fluid for metal drilling, start with a pilot mark or center punch on sheet materials to prevent walking, and replace the bit if wear or chipping appears to maintain hole quality.