Spiral cutting drill bit DeWalt DT70791-QZ — for aluminium, plastic, steel, wood

DeWalt DT70791-QZ spiral cutting drill bit is designed for drilling aluminium, plastic, steel and wood. The bit features a spiral cutting geometry that promotes efficient chip evacuation and stable drilling performance across a range of materials. It is suitable for use in hand drills and drill presses for general-purpose metalworking, woodworking and plastic fabrication tasks.

Advantages

The spiral cutting geometry improves chip removal and reduces clogging, helping maintain a steady cutting action. Its construction and finish provide improved wear resistance and smoother entry into various materials. The bit is versatile across non-ferrous metals, plastics and common woods, offering consistent hole quality and reduced walking at drill start.

Suitable for

• Drilling holes in aluminium profiles and sheet metal
• Creating holes in plastic panels and components
• General-purpose steel drilling for light to medium tasks
• Woodworking tasks such as dowel and pilot holes

Key specifications

• Cutting geometry: spiral flute for efficient chip evacuation
• Materials: engineered for aluminium, plastic, steel and wood
• Finish: dark and gold-toned surface treatment for wear resistance
• Compatibility: suitable for use in hand-held drills and drill presses
• Intended use: general-purpose metalworking, woodworking and plastic fabrication

How to use

Secure the drill bit firmly in the chuck and set the drill to an appropriate speed for the material being worked: higher speeds for aluminium and plastics, lower speeds for steel. Mark the drilling point and, if necessary, use a centre punch for metal to prevent walking. Apply steady, even pressure and allow the spiral flutes to evacuate chips; withdraw the bit periodically on deeper holes to clear chips and reduce heat build-up. Use cutting fluid for steel to extend tool life.

Usage recommendations

For best results, match drill speed and feed to the material: medium-to-high RPM for aluminium and plastics, low-to-medium RPM with cutting lubricant for steel. Wear appropriate eye and hand protection, clamp workpieces securely, and avoid excessive pressure to prevent overheating and premature wear.