Kierrep pora KWB 248060 1 kpl oikealeikkaava

The kwb HSS-Co twist drill bit (KWB 248060) is designed for precise drilling in demanding materials including alloyed and unalloyed steel, stainless steel (V2A/V4A), grey cast iron, cast steel, bronze and plastics. Manufactured to DIN 338 from a 5% cobalt high-speed steel alloy, this right-hand rotation drill bit features a parallel shank for universal compatibility with drilling machines and comes as a single piece for straightforward use.

Advantages

The 5% cobalt HSS-Co material increases heat resistance and durability compared with standard HSS drills. The 135° point angle with a split point (DIN 1412 C) provides self-centring performance and reduces walking on the workpiece, enabling accurate starts. The parallel shank ensures secure clamping in chucks and holders while the right-hand cutting geometry is suitable for conventional drilling machines.

Suitable for

Key specifications

How to use

Secure the drill bit in the machine chuck or holder ensuring the parallel shank is fully seated. Select appropriate spindle speed and feed for the material being drilled; reduce speed for stainless steel and harder alloys and increase for softer materials such as plastics and bronze. Use suitable cutting fluid or coolant when drilling steels and cast irons to extend tool life and improve chip evacuation. Start drilling with light pressure to take advantage of the split-point self-centring feature, then apply steady feed until the hole is complete.

Recommendations

For best results, match cutting speed and feed to the workpiece material, use cutting fluid for ferrous materials, and avoid excessive dwell at the start to prevent overheating. Inspect the drill for wear before use and replace when edges become dull to maintain hole quality.