150mm Step Drill Set UltimateCut HSS Spiral Flute RUnaTEC Coated FlowStep® Tip, 118° Point - Ruko GmbH

Take advantage of the combination of HSS construction, FLOWSTEP® centring tip and a non-slip 3‑flat shank for fast, precise and durable holemaking in a wide range of materials. Order the ULTIMATECUT step drill set directly via Metav Werkzeuge or ask our consultants if technical details require clarification.

ULTIMATECUT Step Drill Set D5–12 / 6–20 / 8–30 mm, HSS, spiral‑fluted – Ruko

A ULTIMATECUT step drill set designed for rapid, smooth step drilling in sheet metal and round sections, optimised for use with hand‑held electric tools.

• HSS with RUnaTEC coating
• FLOWSTEP® centring tip for fast starts
• Spiral flute with two cutting edges
• 3‑flat shank prevents slippage
• Impact‑ and break‑resistant plastic cassette

Faster, cleaner holemaking through advanced coating and geometry

The set is manufactured from HSS and finished with a RUNaTEC coating to increase thermal stability and reduce wear. The spiral flute and 2 cutting edges provide efficient chip evacuation and a controlled cutting action, which translates into a smoother drilling cycle and reduced operator effort. As a result, the tooling delivers a markedly improved hole quality and, through enhanced lifetime characteristics, can achieve up to 2× more holes compared with conventional step drills — a clear efficiency gain for busy workshops.

Point‑accurate centring and reduced setup time on complex surfaces

Equipped with the FLOWSTEP® centring tip, the set allows point‑accurate centring without the need for centre‑punching, even on curved surfaces such as pipes and tubes. The geometry includes a 118° tip angle and a 90° step angle, ensuring stable initial engagement and a gradual, low‑impact transition between diameters. This combination reduces the chance of skiving or wobble and speeds up throughput by eliminating extra preparatory steps.

Robust construction for reliable workshop performance

The tools feature a 3‑flat shank that prevents the bit from turning in the chuck, improving safety and repeatability during handheld operation. The RUnaTEC finish and optimized tool geometry contribute to high wear resistance and heat tolerance, while the set is supplied in an impact‑ and break‑resistant plastic cassette for secure transport and storage. These design choices reduce downtime and part rejection rates, supporting consistent production quality in industrial and craft environments.

Smooth handling and suitability for hand‑held electric tools

Right‑hand cutting geometry and the FLOWSTEP® transitions ensure a light and steady drilling action, lowering the torque spikes typically felt when stepping up in diameter. Step pitches are tailored for each range to balance feed and control: Ø5–12 = 1 mm, Ø6–20 = 2 mm, Ø8–30 = 2 mm. This makes the set particularly appropriate for portable drills and bench machines where operator comfort and precise control are priorities, while maintaining productivity across diverse materials.

Contact Metav Werkzeuge for procurement advice and reliable supply of the Ruko ULTIMATECUT step drill set — expert assistance from Emmerich ensures the right tools and prompt delivery

Technical data

• SKU: 4000865860NW
• Label: Stufenbohrersatz ULTIMATECUT D.5-12/6-20/8-30mm HSS Spiralnut
• Manufacturer: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen
• Packaging unit: 1
• UID: 4000865860NW

Facts

• Diameter ranges: 5–12 mm / 6–20 mm / 8–30 mm
• Tip angle: 118°
• Step angle: 90°
• Cutting edges: 2
• Step pitch: Ø5–12 = 1 mm; Ø6–20 = 2 mm; Ø8–30 = 2 mm

Special features

• Material: high‑speed steel (HSS)
• Coating: RUnaTEC
• Spiral‑fluted geometry
• FLOWSTEP® centring tip on all steps
• Right‑hand cutting
• 3‑flat shank for anti‑rotation
• Optimised for hand‑held electric tools
• Supplied in impact‑ and break‑resistant plastic cassette
• Improved wear resistance and warm hardness, extends service life

FAQ

What materials can be processed with this step drill set?
The ULTIMATECUT step drill set is made of HSS with a RUNaTEC coating and is suitable for common workshop materials; its robust geometry supports drilling in various non‑ferrous and ferrous materials when used under appropriate conditions.

How does FLOWSTEP® improve drilling performance?
FLOWSTEP® provides a soft, continuous transition between diameters, reducing torque peaks and enabling point‑accurate centring; this results in smoother drilling, less vibration and improved hole quality for the ULTIMATECUT set.

Is the set suitable for use in handheld drills?
Yes. The 3‑flat shank prevents slippage in chucks and the geometry has been optimised for handheld electric tools, offering a lighter and more controlled drilling action with the ULTIMATECUT set.

How are the steps arranged and what are the pitch values?
The set covers stepped ranges 5–12 mm, 6–20 mm and 8–30 mm. Step pitches are Ø5–12 = 1 mm, Ø6–20 = 2 mm and Ø8–30 = 2 mm, which balance feed rate and control during progressive drilling.

What is included in the delivery?
The ULTIMATECUT set is supplied in an impact‑ and break‑resistant plastic cassette for secure storage and easy transport; the cassette contains the stepped drills for the three diameter ranges listed.

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