AWTOOLS Step Drill Bit Spiral M2 TiAlN Coated 4-45 mm

Step drill bit with spiral flute, M2 HSS, TiAlN coated, drilling range 4–45 mm. Ideal for precise, burr-free holes in sheet metal, steel, non-ferrous metals, plastics, and wood. The spiral flute design ensures efficient chip evacuation and smooth cutting, while the TiAlN coating provides high heat and wear resistance for extended tool life.

Advantages

The AWTOOLS step drill bit combines a robust M2 high-speed steel body with a titanium aluminum nitride (TiAlN) coating, delivering exceptional durability and performance. Its spiral flute geometry reduces cutting forces and prevents clogging, even in deep or stacked materials. The self-centering split point tip eliminates walking and allows accurate hole positioning without a pilot drill. With 21 steps in 2 mm increments, it replaces multiple individual drill bits, saving time and tool changes.

Suitable for

• Sheet metal and thin steel plates up to 4 mm thickness
• Non-ferrous metals such as aluminum, copper, and brass
• Plastics, including acrylic, PVC, and polycarbonate
• Wood and wood-based panels
• Deburring and enlarging existing holes

Key specifications

• Drill type: Step drill bit with spiral flute
• Material: M2 high-speed steel (HSS)
• Coating: Titanium Aluminum Nitride (TiAlN)
• Drilling diameter range: 4 mm to 45 mm
• Step increments: 2 mm (21 steps)
• Shank diameter: 12 mm cylindrical
• Overall length: 110 mm
• Point angle: 135° self-centering
• Recommended for use with rotary drills and drill presses

Recommendations

For best results, use cutting oil or lubricant when drilling steel and stainless steel. Operate at moderate speed and apply steady, even pressure. The TiAlN coating allows dry cutting in many materials, but cooling extends tool life. Always secure the workpiece and wear appropriate safety gear.