Irwin HSS Jobber Drill Bit 7.2mm

The Irwin HSS Jobber Drill Bit 7.2mm is a precision-engineered tool designed for high-performance drilling in metal. Manufactured from high-speed steel, this drill bit offers excellent heat resistance and structural integrity, allowing for clean and accurate holes in various ferrous and non-ferrous metals. Its geometry is optimized for efficient chip evacuation, which prevents clogging and reduces the risk of overheating during extended operation.

Advantages

This drill bit stands out due to its robust construction and high-speed steel composition, which ensures a longer service life compared to standard carbon steel bits. The precision-ground cutting edges provide superior centering capabilities, minimizing the need for center punching on many surfaces. Its design promotes smooth material penetration, resulting in reduced vibration and increased control for the operator during demanding drilling tasks.

Suitable for

• Drilling holes in mild steel and cast iron
• General metalworking and fabrication projects
• Workshop maintenance and repair tasks
• Drilling into non-ferrous metals like aluminum or copper

When it may not be suitable

This drill bit is not intended for drilling into hardened steel, stainless steel, or masonry materials, as these require specialized cobalt or carbide-tipped tools. Using this bit on excessively hard materials will lead to rapid dulling and potential breakage.

Key specifications

• Diameter: 7.2mm
• Material: High-speed steel (HSS)
• Design: Jobber length
• Application: Metal drilling

How to use

To achieve the best results, secure your workpiece firmly in a vice or clamp to prevent movement. Mark the drilling point clearly and use a center punch to create a small indentation for the drill tip to seat into. Set your drill to a moderate speed suitable for the material being worked on and apply steady, consistent pressure. It is recommended to use a cutting fluid or oil to lubricate the bit and cool the contact area, which significantly extends the life of the tool and improves the finish of the hole.

What to consider before purchase

• Verify that your drill chuck is compatible with the 7.2mm shank diameter.
• Ensure the material you intend to drill is compatible with high-speed steel.
• Consider purchasing a set if you require multiple sizes for your project.

Usage recommendations

Always wear appropriate eye protection when drilling metal. Regularly inspect the drill bit for signs of wear or dulling, and replace it if the cutting edges show significant degradation to maintain drilling accuracy and safety.