5-28mm Step Drill HSS Spiral Flute 2-Flute 118° Point 90° Step Angle 3-Flats Shank - Ruko GmbH

Take advantage of the combination of reliable multi-diameter drilling, efficient chip evacuation and sturdy clamping for smoother workshop workflows; order the RUKO step drill directly via Metav Werkzeuge or consult our specialists for application advice.

RUKO Step Drill 5–28 mm (HSS, spiral flute, 2-cut)

The RUKO Step Drill 5–28 mm is a high-performance step drill for clean, repeatable multi-diameter holes in metalworking and general workshop use

HSS construction for long tool life
Spiral flute for reliable chip evacuation
Cross-ground tip with 118° point angle
Shank with three flats for secure clamping

Faster, consistent multi-diameter drilling for production

The RUKO unit combines a high-speed steel (HSS) body with a spiral flute to deliver rapid material removal and reduced clogging during continuous operation. The stepped geometry (range 5–28 mm) allows several diameters to be created in a single pass, cutting set-up time and reducing tool changes. Thanks to the cross-ground tip and 118° point angle, centring is improved which lowers walk and optimises hole position. These technical choices translate into measurable productivity gains on production jobs and maintenance tasks where consistent hole quality is required.

Secure clamping and precise step formation for reliable results

A shank with three flats ensures positive engagement in chucks or collets, preventing slippage under higher torque. The tool’s 90° step angle and clearly defined step edges provide repeatable diameters across the seven steps, making each hole predictable and simplifying downstream processes such as reaming or tapping. With 2 cutting edges, the drill balances efficient cutting with manageable feed rates, so operators can implement straightforward machining parameters while achieving a consistent surface finish and dimensional control.

Long life and practical handling in everyday workshops

Constructed from HSS and finished with spiral fluting, the drill offers robustness for routine workshop use. Spiral flutes promote continuous chip evacuation, which reduces heat build-up and wear at the cutting face; this extends service intervals and lowers total tool costs over time. The combination of geometry and materials means the tool is suitable for jobs that prioritise repeatability and uptime rather than single-use specialty tasks. For users seeking predictable performance from a standardised solution, this step drill is a practical addition to tooling inventories.

Choose the RUKO step drill for efficient multi-diameter drilling and contact Metav Werkzeuge for tailored application guidance and expedited supply from our Emmerich hub via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 4000601714NW
• Label: Stufenbohrer 5–28 mm HSS spiral flute, 7 steps
• Packaging unit: 1

Facts

• Diameter range: 5–28 mm
• Steps: 7
• Cutting edges: 2
• Point angle: 118°
• Step angle: 90°

Special features

• Material: HSS
• Spiral flute
• Cross-ground tip
• Shank with 3 flats

FAQ

What diameter range does the step drill cover?
The RUKO step drill covers a diameter range of 5–28 mm, allowing multiple hole sizes from a single tool.

How many steps and cutting edges are on the tool?
The tool features 7 steps and 2 cutting edges, designed for progressive enlargement with consistent step geometry.

What benefits does the spiral flute provide?
The spiral flute improves chip evacuation, reducing heat and helping to maintain cutting performance over extended runs.

Is the drill suitable for secure clamping in standard chucks?
Yes, the shank with three flats ensures secure clamping and reduces slippage in chucks and collets.

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