Drill bits DeWalt HSS E Cobalt 9.0 mm, set of 10

DeWalt HSS E Cobalt 9.0 mm drill bits, supplied as a set of 10, are engineered for drilling hard metals and demanding industrial materials. Manufactured from high-speed steel with a cobalt alloy, these 9.0 mm bits offer improved heat resistance and extended cutting life compared with standard HSS bits. The set format provides multiple identical drills for repetitive workshop, maintenance, or professional metalworking tasks.

Advantages

The cobalt-enhanced high-speed steel composition increases hardness at elevated temperatures, reducing premature wear during prolonged cutting operations. The uniform 9.0 mm diameter across ten pieces ensures consistent hole size and predictable performance when machining steel, stainless steel and other hard alloys. The set configuration reduces downtime for tool changes and supports bulk operations where spare bits are needed.

Suitable for

• Drilling steel and stainless steel
• Workshop and maintenance drilling tasks
• Professional metalworking and fabrication
• Batch or repetitive drilling where multiple identical bits are required

Key specifications

• Material: high-speed steel with cobalt alloy
• Diameter: 9.0 mm
• Quantity in set: 10 pieces
• Intended use: drilling hard metals and industrial materials
• Shank type: standard straight shank suitable for drill chucks

How to use

Select an appropriate drilling speed and use cutting fluid when drilling stainless steel or other heat-sensitive alloys to maximize bit life. Secure the workpiece and align the drill perpendicular to the surface to ensure accurate holes. Start with a pilot hole if drilling very thick or hardened material, then progress at steady pressure without forcing the bit. Replace worn bits from the set to maintain hole quality and prevent damage to the workpiece.

Usage recommendations

For best results, operate drills at recommended speeds for HSS cobalt bits, use coolant or cutting oil when machining stainless steels, and avoid excessive side loading. Store the set in a dry place and rotate bits from the kit to keep backups available during extended jobs.