Drill bit Bosch 4 mm diameter model 2608900154, HSS for metal and wood

Bosch 4 mm drill bit model 2608900154 is a high-speed steel (HSS) cutting tool intended for drilling accurate holes in metal and wood. The 4 mm diameter and HSS material provide a balance of strength and sharpness for routine maintenance, assembly and DIY tasks using handheld drills or drill presses. The bit's geometry is optimized for straight drilling and consistent hole sizing across common ferrous and non-ferrous metals as well as soft and hardwoods.

Advantages

The HSS construction ensures wear resistance and heat tolerance during continuous drilling, while the 4 mm diameter delivers precise, repeatable hole dimensions. Designed by Bosch for compatibility with standard three-jaw chucks, the bit offers reliable cutting performance and stable running with minimal wobble. Its robust tip profile reduces walking at startup and promotes efficient chip evacuation for cleaner holes.

Suitable for

• Drilling small-diameter holes in thin steel, aluminum and other non-ferrous metals
• Creating pilot holes and through-holes in softwoods and hardwoods
• General repair, assembly and maintenance work with handheld drills or drill presses
• DIY projects requiring accurate 4 mm holes for fasteners, dowels or fittings

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 4 mm
• Intended materials: Metal and wood
• Suitable drives: Standard three-jaw drill chucks (cylindrical shank)
• Application: Handheld drills and drill presses for standard drilling tasks

How to use

Secure the drill bit in a properly tightened three-jaw chuck and set the drill or drill press to the appropriate speed for the material: medium to high speeds for wood, lower speeds for steel. Mark the drilling point and, if necessary, use a center punch for metal to prevent walking. Apply steady, even pressure and allow the bit to cut without forcing; withdraw occasionally to clear chips when drilling deeper holes. Use cutting fluid when drilling hardened or thick metal to reduce heat and extend bit life.

Recommendations

For best results, match drill speed and feed to the material: higher RPM and light feed for wood, lower RPM and moderate feed for metal. Keep the bit sharp and clean; replace when wear or tip damage reduces accuracy. Use appropriate personal protective equipment and secure workpieces before drilling.