Broca KWB 421106 6 mm 1 ud.

HSS twist drill with 1/4" hexagon shank to ISO 1173 (E 6.3), precision ground and right-hand cut (type N), diameter 6 mm, supplied in a single blister pack. The KWB 421106 is intended for use with cordless drivers, drills and bit holders that accept a 1/4" hexagon drive. The tip angle is 135° and the drill is self-colour.

Advantages

The KWB 421106 offers a precision-ground HSS cutting geometry for accurate holes and reduced walking at the start. The 1/4" hex shank provides quick bit changes and secure retention in chucks and bit holders conforming to ISO 1173. A 135° tip angle improves centring and performance in alloyed and mild steel, cast materials, non-ferrous metals and hard plastics.

Suitable for

Key specifications

How to use

Install the drill bit into a compatible 1/4" hexagon bit holder, chuck or quick-change adapter that complies with ISO 1173. Select an appropriate rotation speed and feed rate for the material being drilled. For metals, use cutting fluid or coolant as required; for plastics, reduce speed to avoid melting. Start drilling with steady pressure and keep the tool perpendicular to the workpiece. Retract periodically to clear chips when drilling deeper holes.

Recommendations

For best results, match drill speed and feed to the work material, secure the workpiece, and use cutting fluid on steel and cast iron. Replace the bit when wear affects hole accuracy or increases drilling force.