Step drill bit DeWalt DT5027 6–18 mm, tapered HSS for metal and plastic

DeWalt DT5027 step drill bit covers a 6–18 mm drilling range in a single tapered HSS body, intended for progressive enlargement of holes in sheet metal, thin steel, aluminum and various plastics. The single-flute profile and tapered geometry enable stepwise cutting from small to larger diameters without changing tools, suitable for both portable hand drills and drill presses used in electrical, HVAC, automotive and general workshop tasks.

Advantages

The high-speed steel (HSS) construction offers durability and heat resistance for extended cutting life when working with thin metals and plastics. The tapered stepped design provides smooth transitions between diameters, reducing burr formation and minimizing the need for deburring. The single-flute profile efficiently evacuates chips, improving cutting stability and reducing clogging during continuous drilling operations.

Suitable for

• Drilling progressively larger holes in sheet metal and thin steel
• Create clean holes in aluminum panels and metal enclosures
• Making holes in plastic panels and PVC components
• Electrical, HVAC and automotive installations requiring multiple hole sizes
• Workshop use with hand drills and drill presses for prototype and maintenance work

Key specifications

• Drilling range: 6–18 mm in stepped increments
• Material: tapered high-speed steel (HSS)
• Flute type: single-flute profile for chip evacuation
• Suitable workpiece materials: sheet metal, thin steel, aluminum, plastics
• Shank type: cylindrical shank for standard drill chucks

How to use

Secure the workpiece and mark the center point for the required hole size. Fit the step drill bit into a drill chuck and tighten securely. Start drilling at low speed to establish the initial pilot contact, then increase speed as appropriate for the material. Apply steady, moderate pressure and allow the single-flute design to remove chips; periodically retract slightly to clear debris when drilling thicker sections. After reaching the desired step diameter, reduce speed before withdrawing the bit to minimize burring.

Usage recommendations

Use appropriate cutting lubricant when drilling thicker steel or stainless materials to reduce heat and extend tool life. Wear eye protection and secure thin sheet materials with clamps to prevent vibration. For repeatable hole sizes, mark steps on the radiused edge or use a depth stop on a drill press.