Broca helicoidal KWB 248042 1 unid. rotação à direita

The kwb HSS-Co twist drill bit (mpn 248042, EAN 4009312480421) is a right-hand rotation twist drill manufactured to DIN 338 standards with a 5% cobalt alloy for improved wear resistance. Its 135° split point according to DIN 1412 C provides self-centring performance to reduce walking on the workpiece and enables precise drilling in a range of materials including alloyed and unalloyed steels, stainless steel (V2A/V4A), grey cast iron, cast steel, bronze and various plastics. The drill has a parallel shank for universal compatibility with most drilling machines.

Advantages

The cobalt-enriched high-speed steel composition increases hardness and heat resistance for longer tool life under demanding conditions. The 135° point angle with split point ensures accurate start-up and reduced slipping, improving hole precision. Compliance with DIN 338 and DIN 1412 C guarantees consistent geometry and reliable performance. The parallel shank facilitates secure clamping in chucks and adapters common to both hand-held and stationary drilling machines.

Suitable for

Key specifications

How to use

Secure the twist drill bit in an appropriate chuck or adapter that accepts a parallel shank. Select a suitable spindle speed and feed rate for the workpiece material to avoid overheating—lower speeds for stainless steel and higher speeds for softer materials. Apply steady pressure and allow the drill to cut without forcing; use cutting fluid or coolant when drilling metals to extend tool life and improve chip evacuation. Clear chips regularly from the hole and pause to cool the drill when necessary.

Recommendations

For best results, use appropriate cutting fluid when drilling stainless steel and cast materials, pre-drill pilot holes for large diameters, and follow recommended speeds and feeds for each material to maximize tool life and maintain hole accuracy.