Drill bit DeWalt DT5548 HSS 5.5 mm for metal and general purpose

DeWalt DT5548 is a 5.5 mm high-speed steel (HSS) drill bit designed for drilling metal and general-purpose tasks. Manufactured from HSS material, this bit offers hardness and heat resistance required for routine metalworking, maintenance and construction jobs. The 5.5 mm diameter makes it suitable for creating precise holes in mild steel, non-ferrous metals and similar materials when used with standard corded or cordless drills and standard chucks.

Advantages

The HSS construction provides improved durability and wear resistance compared with carbon steel bits, while heat resistance maintains cutting performance under prolonged use. The 5.5 mm size delivers consistent, clean holes for fixing, fitting and assembly operations. Compatibility with common drill chucks makes the bit convenient for fieldwork and workshop use. Its geometry is optimized for metal penetration to reduce walking and improve centering on flat surfaces.

Suitable for

• Drilling holes in mild steel and sheet metal
• Working with non-ferrous metals such as aluminium and brass
• General maintenance, repair and installation tasks
• Workshop and on-site construction drilling

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 5.5 mm
• Intended use: metal and general-purpose drilling
• Compatible with: standard drill chucks (corded and cordless drills)
• Suitable materials: mild steel, aluminium, brass and similar metals

How to use

Secure the drill bit in a standard drill chuck, ensuring it is tightened and aligned. Select an appropriate drill speed for metal drilling—moderate to high speed depending on material thickness—and apply steady, even pressure. Use cutting fluid or lubricant when drilling thicker or harder metals to reduce heat buildup and extend bit life. After drilling, clear chips from the hole and inspect the bit for wear before further use.

Usage recommendations

For best results, start with a centre punch to prevent wandering on flat surfaces, use appropriate cutting fluid for prolonged drilling into steel, and replace the bit when signs of dulling or chipping appear to maintain hole quality and operator safety.