Makita D-09721 HSS-G Metal Drill Bit 5.0 x 86 mm

The Makita D-09721 HSS-G metal drill bit is a professional-grade accessory engineered for precision and reliability in metalworking applications. With a diameter of 5.0 mm and a total length of 86 mm, this drill bit is manufactured from high-speed steel, ensuring excellent heat resistance and longevity during demanding drilling tasks. The ground flute design facilitates rapid chip removal, which helps maintain a consistent cutting speed and prevents overheating, resulting in clean and accurate holes in various ferrous materials.

Advantages

This drill bit offers superior performance due to its high-quality HSS-G construction, which provides increased hardness and durability compared to standard bits. The precision-ground geometry ensures that the bit remains sharp for longer periods, reducing the need for frequent replacements. Its design minimizes friction during operation, allowing for smoother drilling and reduced strain on the power tool, which ultimately leads to more efficient work processes and higher quality results in metal fabrication and repair projects.

Suitable for

• Drilling holes in steel and iron
• General metalworking and fabrication tasks
• Construction and maintenance projects
• Creating pilot holes for fasteners

When it may not be suitable

This drill bit is specifically optimized for metal applications and may not be the most efficient choice for drilling into masonry, concrete, or soft wood, where specialized geometry is required for optimal debris clearance. It is also not intended for use with hardened or tempered steel alloys that require carbide-tipped tooling.

Key specifications

• Diameter: 5.0 mm
• Total length: 86 mm
• Material: High-speed steel (HSS-G)
• Design: Ground flute for efficient chip removal

How to use

To achieve the best results, ensure the drill bit is securely fastened in the chuck of your power drill or drill press. Mark the center point of the hole to be drilled using a center punch to prevent the bit from wandering. Apply steady, moderate pressure while maintaining a consistent speed suitable for the material being drilled. It is recommended to use a cutting fluid or lubricant to reduce friction and heat buildup, which will extend the life of the drill bit and improve the finish of the hole.

What to consider before purchase

• Verify the chuck capacity of your drill to ensure it accommodates a 5.0 mm shank.
• Ensure the material being drilled is compatible with HSS-G steel.
• Consider purchasing a set if you require multiple hole sizes for your project.

Usage recommendations

Always wear appropriate eye protection when drilling metal to prevent injury from flying chips. Periodically inspect the bit for signs of wear or dullness and replace it if necessary to maintain drilling accuracy.