150mm Step Drill Set HSS-Co5 Spiral Flute 3pc, Cross Point, Plastic Case - Ruko GmbH

Combine the superior heat resistance of HSS‑Co5 with the efficient chip evacuation of a spiral flute and secure clamping via a shank with three flats for consistent hole quality; purchase directly through Metav Werkzeuge or consult our specialists for application guidance.

RUKO Step drill set Ø4–12 / Ø4–20 / Ø4–30 mm, HSS‑Co5, spiral flute

The RUKO Step drill set Ø4–12 / Ø4–20 / Ø4–30 mm is a three‑piece stepped drill set designed for progressive hole enlargement in thin materials, offering a compact solution for workshop and production environments.

• Spiral flute for fast chip evacuation
• Cross‑ground cutting edges for clean holes
• Shank with three flats for secure clamping
• Impact‑resistant plastic case included

Consistent hole quality through material and geometry

The three‑piece set uses HSS‑Co5, a cobalt‑alloyed high‑speed steel that improves heat resistance and edge life compared with standard high‑speed steels. Combined with the spiral flute geometry and cross‑ground cutting edges, the design promotes steady chip removal and reduces burr formation during progressive drilling. These features translate into fewer rework cycles and a more reliable hole finish in repetitive operations, supporting steady production throughput.

Secure clamping and controlled feed for repeatable results

A shank with three flats provides defined clamping surfaces for chucks and collets, minimising slippage and runout during operation. The stepped geometry with specified pitch values (Ø4–12 = 1 mm; Ø4–20 = 2 mm; Ø4–30 = 2 mm) enables controlled axial feed and predictable hole stepping, which is particularly useful when a single tool must produce a range of diameters. The twist‑drill inspired geometry ensures that the cutting action remains efficient across each step, facilitating consistent cycle times and reduced tool changeover.

Robust storage and workshop readiness

The set is supplied in an impact‑ and break‑resistant plastic case, keeping the three stepped cutters organised and protected from transport damage. Compact storage aids inventory control and reduces the risk of damaged edges before use. As a practical workshop solution, this three‑piece set offers flexibility for a range of hole sizes while simplifying tool management at the bench or on the production line.

Contact Metav Werkzeuge for tailored advice and to arrange supply of the RUKO step drill set; call +49 2822 7131930 or email info@metav-werkzeuge.com

Technical Data

• Article number: 4000601746NW
• SKU: 4000601746NW
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Facts

• Drill diameters: Ø4–12 mm; Ø4–20 mm; Ø4–30 mm
• Pieces: 3
• Pitch: Ø4–12 = 1 mm; Ø4–20 = 2 mm; Ø4–30 = 2 mm

Special features

• Material: HSS‑Co5
• Spiral flute
• Cross‑ground cutting edges
• Shank with three flats
• Impact‑ and break‑resistant plastic case

FAQ

What materials does the set handle best?
The RUKO step drill set is manufactured from HSS‑Co5, providing enhanced heat resistance and wear performance; this alloy improves edge life under higher temperatures compared with standard high‑speed steels.

How many pieces are included and which diameters are covered?
The delivery contains a three‑piece set covering stepped diameters Ø4–12 mm, Ø4–20 mm and Ø4–30 mm, offering a compact range for progressive hole enlargement.

How does the shank design improve clamp security?
The shank with three flats creates defined contact surfaces for chucks and collets, which reduces the risk of slippage and runout and helps maintain concentricity during drilling.

Is the set supplied ready for transport and storage?
Yes, the cutters are housed in an impact‑ and break‑resistant plastic case that protects cutting edges and simplifies organisation in the workshop.

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