Broca helicoidal para metal KWB 258648, 4,8 mm Ø, comprimento 86 mm

Metal spiral drill bit KWB 258648 with a 4.8 mm diameter and 86 mm overall length, designed for drilling through steel and other metals. The spiral flute geometry evacuates chips efficiently to maintain a stable cutting action and consistent hole diameter. Intended for use with handheld drills and drill presses in workshop repairs, metal fabrication, and maintenance tasks.

Advantages

The spiral flute removes chips away from the cutting edge to reduce clogging and overheating, improving drilling speed and hole quality. A precision ground point ensures accurate centring and consistent hole diameter throughout the cut. The shaft diameter and overall length provide a balance between rigidity and reach, making the bit suitable for both general-purpose metal drilling and more confined access situations.

Suitable for

Key specifications

How to use

Secure the drill bit in the chuck of a handheld drill or drill press, ensuring proper clamping to prevent slippage. Mark the drilling location and, if necessary, use a centre punch to improve starting accuracy. Start drilling at low speed to establish the pilot, then increase speed within recommended ranges for the material. Apply steady, moderate pressure and withdraw periodically to clear chips and reduce heat buildup. Use cutting fluid for improved tool life and hole finish when drilling harder metals.

Recommendations

For best results, select drilling speeds appropriate to the metal type and thickness, use cutting lubricant for steel and tougher alloys, and avoid excessive side loads to maintain bit life and hole accuracy.