Drill bits DeWalt HSS-E Cobalt 6.8 mm set of 10

DeWalt HSS-E Cobalt drill bits, 6.8 mm diameter, set of 10 in bulk supply. These solid high-speed steel bits with cobalt alloy are designed for demanding metalworking tasks and provide greater heat resistance and wear life compared with standard HSS. The 6.8 mm cutting diameter is aimed at straightforward hole creation in steels and other ferrous materials using handheld or bench drills, offering consistent geometry for repeatable performance.

Advantages

The cobalt-enhanced HSS-E construction increases hardness at elevated temperatures, reducing wear when drilling hard or abrasive metals. Precision ground flutes and a uniform point geometry improve chip evacuation and drilling accuracy. Supplied as a set of 10, the bits are convenient for workshop stocking and replacement needs, reducing downtime during metal fabrication or repair work.

Suitable for

• Drilling holes in carbon steel
• Working with stainless steel and other ferrous alloys
• General metal fabrication and repair using handheld or bench drills
• Maintenance and industrial workshop use

Key specifications

• Material: high-speed steel with cobalt alloy (HSS-E)
• Diameter: 6.8 mm cutting diameter
• Package quantity: set of 10 bits (bulk)
• Tip/point: precision ground geometry for metal drilling
• Suitable tool: handheld electric drill and bench drill

How to use

Secure the workpiece and select an appropriate drill speed for the material—lower speeds for harder steels and higher speeds for softer ferrous metals. Install the 6.8 mm bit in the drill chuck and tighten securely. Apply steady pressure, allow chips to clear, and withdraw periodically if drilling deep holes to avoid overheating. Use cutting fluid or coolant when drilling stainless steel or other hard alloys to extend bit life and improve hole quality.

Usage recommendations

Optimize bit life by using suitable cutting fluid, moderate drilling speeds, and intermittent pecking for deep holes. Replace worn bits to maintain hole accuracy and reduce the risk of workpiece damage.