Kierrep pora KWB 238633

The KWB 238633 twist drill bit is a precision ground, right-hand rotation drill manufactured to DIN 338 Type N standards. It features a TiN (titanium nitrided) gold-coloured surface treatment for reduced friction and extended tool life. The bit has a 135° tip angle and is cross-ground to DIN 1412 C to provide reliable self-centring performance. Supplied as a single cylindrical flute drill in blister packaging, it is suitable for industrial use and demanding applications.

Advantages

The titanium nitride coating lowers friction and increases wear resistance, extending service life even under high loads. Precision grinding and cross-ground geometry ensure accurate, clean holes and good self-centring. The 135° tip angle improves entry control and reduces walking, while the gold-coloured surface aids chip evacuation and reduces adhesion when drilling alloyed and unalloyed steels, castings, non-ferrous metals and hard plastics.

Suitable for

Key specifications

How to use

Secure the drill bit in a compatible drill chuck, ensuring the cylindrical shank is seated correctly. Select an appropriate spindle speed and feed rate for the material being drilled; use lower speeds for stainless or hard materials and higher speeds for non-ferrous metals and plastics. Apply steady, even pressure and allow chips to clear regularly. For deeper holes, retract periodically to remove chips and cool the cutting edge. Use cutting fluid where recommended for the material to prolong tool life.

Recommendations

For best results, match drill speed and feed to the material, use suitable cutting fluid on ferrous materials, and avoid excessive axial force. Inspect the bit before use and replace it when wear or damage affects drilling accuracy.