Kierrep pora KWB 248090 1 kpl oikeakätinen

The KWB HSS-Co twist drill bit (model 248090) is a precision drill designed for demanding materials including alloyed and unalloyed steel, stainless steel (V2A/V4A), grey cast iron, cast steel, bronze and various plastics. Manufactured to DIN 338 standards and made with a 5% cobalt alloy, the drill bit provides increased wear resistance for use with hand-held and machine drilling equipment. The right-hand cutting design and parallel shank ensure compatibility with a wide range of drilling machines.

Advantages

The 135° point angle with a split point according to DIN 1412 C enables self-centring drilling and helps prevent slipping at the start of the operation. The 5% cobalt HSS-Co material increases hardness and heat resistance compared with standard HSS, improving tool life when drilling tougher metals. The parallel shank provides secure clamping in chucks and adapters, and the single-piece supply makes it convenient to replace and store.

Suitable for

Key specifications

How to use

Secure the drill bit in a compatible chuck or adapter that accepts a parallel shank. Select appropriate spindle speed and feed rate for the material being drilled; use lower speeds and steady feed for stainless steel and hardened metals. Apply cutting fluid when drilling metals to reduce heat and improve chip evacuation. Start drilling with light pressure to allow the split point to self-centre, then increase pressure to maintain steady progress. Retract periodically to clear chips in deep holes.

Recommendations

For best results, use appropriate cutting lubricant and matching feed/speed settings for the specific material. Inspect the drill bit before use and replace when wear or damage is visible to maintain accuracy and safety.