Broca helicoidal KWB 248055 1 ud. Giro a la derecha

The KWB 248055 twist drill bit is a single-piece right-hand rotation HSS-Co drill manufactured to DIN 338 standards. Made with a 5% cobalt alloy, it is intended for precise drilling in demanding materials including alloyed and unalloyed steel, stainless steel (V2A/V4A), grey cast iron, cast steel, bronze and plastics. The 135° point with a split point according to DIN 1412 C provides self-centring action and reduces slipping during start-up. The drill has a parallel shank for universal compatibility with standard drilling machines.

Advantages

The cobalt-enhanced high-speed steel composition improves heat resistance and edge stability compared with standard HSS, extending tool life when working in harder materials. The 135° split point ensures accurate, self-centring starts and reduces the need for pilot holes. Manufactured to DIN standards, the bit offers consistent geometry and reliable fit in chucks that accept parallel shanks.

Suitable for

Key specifications

How to use

Select a drill speed appropriate for the material being worked (lower speeds for stainless steel and harder alloys). Secure the workpiece and clamp the parallel shank firmly in the drill chuck. Use steady feed pressure and, where necessary, apply cutting lubricant when drilling metals to reduce heat and extend tool life. Start drilling at low speed to let the split point self-centre, then increase speed as the hole progresses.

Recommendations

For best results when drilling stainless steel or other hard alloys, use moderate spindle speeds, steady feed, and an appropriate cutting fluid. Inspect the bit for wear and replace when the cutting edges become dull to maintain hole quality and avoid workpiece damage.