Drill bit AWTools AW STEP TWIST M2-TiAlN, stepped HSS, Ø6–38 mm, model 790333

AWTools AW STEP TWIST M2-TiAlN, stepped HSS, Ø6–38 mm, model 790333 is a multi-diameter stepped twist drill designed to produce progressively larger holes with a single pass. Manufactured from M2 high-speed steel and finished with a titanium aluminium nitride (TiAlN) coating, this drill bit covers a continuous range of diameters from 6 mm up to 38 mm. It is intended for use in drill presses and handheld drills at appropriate speeds and feeds, and is suitable for sheet metal, thin materials and many plastics where stepped holes or progressive drilling is required.

Advantages

The combination of M2 high-speed steel and a TiAlN coating provides improved wear resistance and heat tolerance compared with uncoated HSS, extending tool life during interrupted cuts and higher-speed applications. The stepped design eliminates the need to change tools when enlarging holes, reducing setup time and improving repeatability. The single-flute geometry and tapered steps allow efficient chip evacuation when drilling thin materials and plastics, and the robust shank is compatible with standard drill chucks.

Suitable for

• Drilling stepped or progressively larger holes in sheet metal.
• Creating multiple hole diameters in thin-walled components and panels.
• Working with plastics and non-ferrous thin materials where clean steps are needed.
• Workshop or on-site use with drill presses and portable drills at recommended speeds.

Key specifications

• Material: M2 high-speed steel (HSS) with TiAlN coating.
• Diameter range: stepped coverage from 6 mm to 38 mm.
• Geometry: stepped twist/flute profile for progressive hole enlargement and chip evacuation.
• Suitable toolholders: standard drill chucks for drill presses and handheld drills.
• Application range: sheet metal, thin materials and plastics.
• Recommended use: appropriate spindle speeds and moderate feed rates to match material and step size.

How to use

Secure the workpiece firmly and select appropriate cutting speed for the material to avoid excessive heat build-up. Position the drill bit and start at low speed to establish the initial hole; then apply steady feed pressure while maintaining coolant or lubrication if required for the workpiece material. Withdraw periodically, if necessary, to clear chips and inspect the stepped profile. Use appropriate personal protective equipment and ensure the drill is running true and held perpendicular to the work surface for accurate stepped holes.

Usage recommendations

For best results with sheet metal, use moderate speeds and light feed to prevent burr formation. When drilling plastics, reduce speed and use minimal thrust to avoid melting; a light mist of lubricant or air blast can improve chip evacuation. Replace the bit if wear or chipping of the cutting edges becomes evident to maintain step accuracy and surface finish.