Erizo ER309 HSS TiAlN Step Drill Bit Set (4-12 / 4-20 / 6-30 mm)

Ø (mm) 4-12 | 4-20 | 6-30
Overall length (mm) 65-75-100
DIN 335
Type C
Point angle (º) 130

The HSS-G step drill bit with TiAlN coating, spiral flutes and Step Tip is a premium high-performance tool designed for maximum precision, cutting efficiency and durability in intensive sheet metal work.

Made of HSS-G high-speed steel and coated with TiAlN (titanium aluminum nitride), it offers greater thermal and wear resistance compared to uncoated versions. Its tapered step geometry allows multiple diameters to be drilled with a single tool. The spiral flutes improve chip evacuation and cutting fluidity, while the Step Tip promotes stable centering and controlled progressive penetration.

It is aimed at professional applications that require high productivity and a long service life.

Technical features:

Base material: HSS-G high-speed steel

TiAlN coating

Step Tip geometry for fast, precise and efficient drilling

More holes with less working time and energy consumption

Precise centering without slipping

CBN ground with spiral chip evacuation flutes

Smooth drilling with less noise, vibration and burrs

Radially tight and CBN ground steps

Laser-marked steps for controlled drilling

Suitable for sheet metal up to 4 mm thick

Cutting angle 118°

Cone angle 90°

Right-hand cut

3-flute shank

Range: Evomaxx

Recommended applications or uses:

Primary: Steel, Stainless Steel, Nickel Silver, PVC, Plexiglas

Secondary: Cast Iron, Bronze.

• Made of HSS-G high-speed steel with TiAlN coating.
• Step Tip for precise centering and progressive cutting.
• Spiral flutes for efficient chip evacuation.
• Greater wear and temperature resistance.
• Visible diameter markings for quick identification.