6-32mm Step Drill HSS Spiral Flute 2-Cutter 118° Point 90° Step Angle - Ruko GmbH

Take advantage of robust HSS construction and a spiral-fluted, 9-step design for reproducible stepped holes; combine precise centring with secure clamping for efficient workshop production. Order the RUKO step drill directly via Metav Werkzeuge or consult our specialists for application advice.

RUKO Step Drill 6–32 mm (HSS) — Spiral-Fluted, 9-Step

A RUKO Step Drill 6–32 mm (HSS) engineered for clean, stepped hole creation and reliable clamping in industrial and workshop settings

• High-speed steel (HSS) construction
• Spiral-fluted design for efficient chip removal
• 118° point angle for accurate centring
• Shank with three flats for secure clamping

Reliable cutting performance with reduced walking

The stepped bit is manufactured from high-speed steel (HSS) and finished with a cross-ground point, which stabilises starts and reduces lateral drift during engagement. The 118° point angle improves initial centring on unpunched surfaces, while the pair of cutting edges maintains a consistent cut geometry across each step. These technical choices result in predictable removal rates and less rework, so production cycles run more smoothly and tool change frequency is reduced.

Efficient chip evacuation and step geometry for repeatability

A spiral flute redirects chips away from the cutting zone, lowering heat build-up and reducing clogging between steps. The tool’s 9-step geometry with a 90° step angle provides clearly defined diameters for incremental hole expansion; this enables one-pass sizing where applicable and supports reproducible hole finishes. The shank with three flats ensures reliable gripping in standard chucks or holders, improving torque transmission and minimising slippage under load.

Practical handling and workshop integration

Supplied as a single unit, the stepped drill is designed for straightforward integration into existing machining routines. Routine sharpening is feasible on the two cutting edges, and the spiral flute design aids cleaning and inspection. Technical terms such as "spiral-fluted" refer to the helical groove that channels swarf away from the cutting face; the cross-ground point denotes a split-style tip that aids self-centring. These features simplify day-to-day use and lower the learning curve for operatives when introducing a stepped drilling process.

For specification checks, supply options or application recommendations for the RUKO step drill, contact Metav Werkzeuge in Emmerich by phone or email to receive tailored advice and ensured availability.

Technical data

• Article number: 4000601719NW
• SKU: 4000601719NW
• Description: Stufenbohrer 6–32 mm, HSS, spiral-fluted, 9 steps
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Core measurements

• Diameter range: 6–32 mm
• Steps: 9
• Point angle: 118°
• Step angle: 90°
• Cutting edges: 2
• Shank: three flats

Design and special features

• Material: high-speed steel (HSS)
• Flute: spiral-fluted
• Tip: cross-ground point
• Geometry: 9-step design
• Shank: with 3 clamping flats

FAQ

What diameter range does this stepped drill cover?
The stepped drill covers diameters from 6 to 32 mm and is designed as a 9-step tool for incremental hole enlargement.

How does the spiral flute benefit cutting?
The spiral flute on the RUKO step drill channels chips away from the cutting zone, improving heat dissipation and helping to maintain a consistent cutting action across each step.

Is special clamping required for this shank design?
No special holder is required; the shank with three flats offers improved grip in standard chucks and collets to reduce slippage during drilling.

What advantage does the 118° point angle offer?
A 118° point angle, combined with the cross-ground tip, enhances self-centring on initial contact and decreases the tendency to wander when starting a hole.

Can the cutting edges be resharpened?
The stepped drill’s two cutting edges are suitable for resharpening by an experienced tool service, which restores geometry and extends service life.

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