Drill bit set Bosch HSS metal spiral 2.5 mm, overall length 57 mm, ground, DIN 338, cylindrical shank, 10 pcs

Bosch HSS metal spiral drill bit set, 2.5 mm diameter and 57 mm overall length, contains 10 ground drill bits manufactured to DIN 338 with a cylindrical shank for reliable chuck gripping. These high-speed steel (HSS) bits are engineered for drilling steel and a wide range of other metals. The ground flute geometry and precise point provide consistent chip evacuation and stable drilling performance in workshop, maintenance and DIY environments.

Advantages

The ground HSS construction ensures sharp cutting edges and uniform concentricity for accurate hole sizes. The spiral flute design promotes efficient chip removal and reduces clogging during prolonged drilling. Cylindrical shanks give secure fitment in standard chucks and enable easy bit changes. Produced to DIN 338 tolerances, the bits deliver repeatable results and a predictable service life when used at recommended speeds and with suitable lubrication.

Suitable for

Key specifications

How to use

Mark the drilling position and secure the workpiece to prevent movement. Select an appropriate drill press or handheld drill and clamp the cylindrical shank firmly in the chuck. Use suitable cutting speed for the metal being drilled and apply steady, even feed pressure. For thicker or harder steels, use cutting fluid or lubricant to reduce heat and extend bit life. Withdraw the bit periodically to clear chips if drilling deep holes.

Recommendations

Use moderate drilling speeds for steel, apply cutting fluid for improved performance and cool the bit between prolonged drilling operations. Replace bits when edge wear or diminished drilling accuracy is observed to maintain hole quality and safety.