6-30.5mm HSS Step Drill Spiral Fluted 2 Cutting Edges 118° Tip 90° Step Angle - Ruko GmbH

Take advantage of the combination of durable HSS construction, spiral flute chip evacuation, and a shank with three flats for consistent, secure step drilling; order via Metav Werkzeuge or consult our advisors for application-specific guidance.

RUKO Step Drill 6–30.5 mm – HSS, spiral flute, 9-step design

The RUKO Step Drill 6–30.5 mm is an HSS step drill featuring a spiral flute and cross-ground tip, engineered for progressive hole enlargement with defined step geometry and secure clamping.

• HSS construction for durable performance
• Spiral flute for efficient chip evacuation
• Cross-ground 118° tip for accurate centring
• Shank with three flats for secure clamping

Consistent stepwise holemaking for reliable production results

The stepped profile provides nine defined drilling diameters across the 6–30.5 mm range, enabling fast progression from pilot to final size without tool changes. The 90° step angle controls material removal at each increment, which helps produce neat edges and predictable hole tolerances. Using a single multi-step tool reduces set-up time and minimises tool inventory, supporting workflow efficiency and repeatable results in batch production.

Faster cutting and improved chip control for longer run times

A spiral flute directs chips away from the cutting zone, reducing heat build-up and the likelihood of clogging during continuous operation. Combined with two cutting edges and a cross-ground 118° tip, the geometry promotes reliable centring and smooth entry into the material. This efficient chip evacuation and accurate tip geometry together contribute to lower rework rates and fewer interrupted cycles on the machine.

Secure clamping and straightforward integration into existing tooling

The tool’s shank with three flats ensures positive engagement in conventional chucks and collets, preventing slippage under torque and allowing stable concentricity during drilling. Constructed from HSS, the tool offers robust wear resistance for routine workshop use and is compatible with standard machining procedures. The combination of secure mounting and proven materials supports predictable tool life and consistent hole quality.

For precise application advice or to acquire the RUKO step drill via Metav Werkzeuge, contact Metav Werkzeuge for tailored recommendations and ordering support at info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 4000601715NW
• Designation: RUKO step drill 6–30.5 mm HSS spiral flute, 9 steps
• Packaging unit: 1

Facts

• Diameter range: 6–30.5 mm
• Steps: 9
• Cutting edges: 2
• Tip angle: 118°
• Step angle: 90°

Special features

• Material: HSS
• Spiral flute
• Cross-ground tip
• Shank with three flats

FAQ

What diameter range does the tool cover?
The RUKO step drill covers a diameter range from 6 to 30.5 mm across nine defined steps.

How many cutting edges and steps does the tool have?
The RUKO step drill features two cutting edges and nine steps for progressive enlargement.

What are the tip and step angles of the drill?
The tool is specified with a 118° cross-ground tip and a 90° step angle to ensure reliable centring and clean step transitions.

How does chip removal work with this design?
Chip removal is facilitated by the spiral flute geometry, which guides swarf away from the cutting zone for reduced heat and fewer blockages.

What clamping interface is provided for secure mounting?
The RUKO step drill is supplied with a shank featuring three flats to ensure secure clamping and reduced slippage in standard chucks and holders.

Manufacturer/Responsible: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen