Drill bit AWTools AW STEP DRILL BIT HSS-TIN 4–52 mm, stepped HSS-TiN for sheet and thin materials

AWTools AW STEP DRILL BIT HSS-TIN 4–52 mm is a stepped high-speed steel (HSS) drill specifically designed to produce a range of hole diameters with a single tool. The bit features a titanium nitride (TiN) coating that improves wear resistance and reduces friction during cutting. Its stepped geometry allows progressive drilling and fast hole enlargement in sheet metal, thin plates, plastics and laminates without frequent tool changes.

Advantages

The TiN coating extends tool life and reduces heat buildup for longer continuous use. Stepped design provides multiple diameters in one bit, saving time and minimizing bit changes. High-speed steel construction maintains cutting edge integrity while offering toughness for thin-material applications. The bit produces clean, concentric holes with reduced burr formation and supports rapid deburring and hole-size adjustments.

Suitable for

• Drilling a range of hole sizes in sheet metal and thin steel plates
• Working with plastics, laminates and composite sheets
• Enlarging or reaming existing holes without changing tools
• Rapid prototyping and workshop operations requiring multiple hole diameters

Key specifications

• Material: high-speed steel (HSS) with titanium nitride (TiN) coating
• Diameter range: stepped 4 mm to 52 mm
• Design: multi-step flute geometry for progressive drilling
• Intended materials: sheet metal, thin plates, plastics, laminates
• Typical use: drilling, hole enlargement and deburring in thin materials

How to use

Secure the workpiece to prevent rotation or movement, and select an appropriate drill speed for material thickness and type. Start drilling at the smallest step and apply steady feed pressure; advance progressively through the steps until the desired diameter is reached. Use cutting fluid when machining metals to reduce heat and extend bit life. After use, clean the flutes of chips and store the bit in a dry place to preserve the TiN coating.

Usage recommendations

For best results with sheet metal, clamp the sheet to a backing plate to reduce bending. Use moderate speeds for stainless and hardened thin materials and increase lubrication for tougher alloys. Avoid excessive feed force to prevent step chatter and ensure even hole edges.