Drill bit Bosch 2609255042, 4.2 mm diameter, 75 mm length

Drill bit Bosch 2609255042, 4.2 mm diameter, 75 mm length is a precision-ground twist drill made of high-speed steel from a solid blank. It is a right-hand cutting bit with a geometry and hardness designed for an efficient drilling rate and dimensional accuracy. The bit is intended as an accessory for drilling tasks requiring a 4.2 mm diameter and 75 mm overall length.

Advantages

Manufactured from high-speed steel and ground from solid metal, this drill bit offers consistent cutting performance and wear resistance for a range of common drilling tasks. Its universal geometry makes it suitable for use across many metallic materials and hard plastics, and the single-diameter design ensures repeatable hole size for assembly and installation work. Use of coolant is recommended to extend tool life and improve chip evacuation.

Suitable for

• Repair and maintenance of household and workshop equipment
• Assembly and installation where 4.2 mm holes are required
• Drilling in iron and various steels
• Working with non-ferrous metals and cast materials
• Drilling in hard plastics

Key specifications

• Material: high-speed steel (HSS), ground from solid
• Diameter: 4.2 mm
• Overall length: 75 mm
• Cutting direction: right-hand
• Application: suitable for iron, alloyed and non-alloyed steels, non-ferrous metals, cast iron, cast steel, and hard plastics

How to use

Secure the drill bit in the chuck of a compatible drilling tool, ensuring correct clamping and concentricity. Select appropriate spindle speed and feed for the material being drilled; use lower speeds for harder metals and higher speeds for non-ferrous metals and plastics. Apply cutting fluid or coolant when drilling metals to reduce heat, improve chip removal and prolong tool life. Withdraw the bit occasionally to clear chips on deep holes.

Usage recommendations

For best results, use a quality coolant when drilling metals, choose a drill speed matched to the material, and ensure the bit is sharpened or replaced when wear affects hole quality.