Drill bit set Makita P-61824 – 25 pcs HSS-Co 5% high-speed steel

Makita P-61824 is a 25-piece drill bit set manufactured from high-speed steel with 5% cobalt (HSS-Co 5%), intended for drilling in hard metals and general workshop applications. The set covers a practical range of diameters for common metalworking, maintenance and mechanical tasks, combining improved wear resistance and elevated heat tolerance compared with standard HSS bits.

Advantages

The HSS-Co 5% composition increases hardness and red hardness, allowing the bits to retain cutting performance at higher temperatures and under heavier loads. Precision ground flutes and a consistent point geometry support accurate centring and efficient chip evacuation. Supplied as a matched 25-piece assortment, the set reduces the need to change tools for different hole sizes and is suitable for repeated use in industrial and workshop environments.

Suitable for

• Drilling through hardened and alloy steels
• General metal fabrication and assembly work
• Maintenance and repair tasks in workshops and garages
• Mechanical and engineering prototyping where durability is required

Key specifications

• Material: High-speed steel with 5% cobalt (HSS-Co 5%)
• Set size: 25 pieces covering a range of diameters for metal drilling
• Tip type: Precision ground point for accurate centring
• Flute: Ground flutes for improved chip removal
• Intended use: Designed for drilling in hard metals and general workshop use

How to use

Select the appropriate drill bit diameter for the intended hole and secure the workpiece to prevent movement. Use a suitable drill or drill press, set an appropriate speed for the material being drilled (lower speeds for harder alloys), and apply steady, moderate feed pressure. Use cutting fluid or lubricant when drilling hard metals to reduce heat buildup and extend bit life. Withdraw the bit periodically to clear chips and avoid packing in the flutes.

Usage recommendations

For best results when working with hardened or high-alloy steels, run the drill at reduced speeds, keep a steady feed, and use suitable cutting lubricant. Inspect bits regularly for wear and replace when tip geometry is lost to maintain hole quality and prevent workpiece damage.