Kierrepora Bosch HSS 4,5 mm

Twist drill bit Bosch HSS 4.5 mm is a precision 4.5 mm diameter HSS twist drill with a 1/4-inch hex shank, designed for reliable drilling in metal and suitable for use with impact drivers and standard drills. The bit is precision-ground from solid high-speed steel with an oxide-coated flute, manufactured to DIN 338 Type N with a 135° split-point tip and diameter tolerance h8. Packaged in a blister, the hex shank provides secure grip and reduces slippage during work.

Advantages

The Bosch HSS twist drill offers high robustness for metal drilling and compatibility with impact drivers due to its hex shank. Precision grinding and an oxide-coated flute reduce wear and improve chip evacuation. The 135° pointed split-point tip ensures active cutting and accurate centring, while the h8 diameter tolerance provides consistent hole size.

Suitable for

Key specifications

How to use

Mount the 1/4-inch hex shank securely in the drill or impact driver chuck. Select appropriate speed and feed for the material: moderate speed for metal and higher speed for wood. Use light, steady pressure and allow the bit to cut without forcing to avoid overheating. Periodically withdraw the bit to clear chips and improve cooling.

Recommendations

For longer bit life when drilling metal, use cutting lubricant and avoid excessive speed. Store the drill bit in its blister to protect the cutting edges and maintain the diameter tolerance.