6.3-25.0mm 90° Countersink Set HSS-Co5 Right-Hand Cylindrical Shank DIN 355, RUnaTEC Coating - Ruko GmbH

Take advantage of the combination of RUnaTEC coating, robust HSS‑Co5 construction and a standardised 90° geometry for consistent chamfering and longer tool life; order the set directly via Metav Werkzeuge or consult the technical team for application advice.

ULTIMATECUT 4S Countersink Set 90° (6.3–25.0 mm) HSS‑Co5, Ruko

The ULTIMATECUT 4S countersink set is a precision 90° chamfering solution for metalworking and plastics, designed for workshop and production use with DIN‑compliant geometry.

• RUnaTEC coating for extended tool life
• 90° geometry conforming to DIN 355
• HSS‑Co5 for high‑strength steels and stainless
• Supplied in durable plastic cassette

Prolonged life and reliable chamfering for production

The set combines a RUnaTEC wear‑reducing coating with HSS‑Co5 base material to deliver stable cutting performance and prolonged service life. The 90° geometry, produced to DIN 355, ensures a consistent chamfer profile that reduces secondary finishing work and rejects. In continuous or batch production environments this translates into fewer tool changes and more predictable process windows, supporting stable throughput and quality control in industrial workflows.

Broad material compatibility and technical suitability

Designed for demanding applications, the toolset covers a wide material spectrum, including high‑strength steels, stainless steel (V2A), structural steel, aluminium and a range of plastics. The cobalt‑alloyed high‑speed steel enhances heat resistance and edge retention where temperatures and loads rise, while the right‑hand cutting geometry promotes smooth chip evacuation. The cylindrical shank offers secure clamping in standard toolholders, supporting concentricity and repeatability in machining operations.

Practical workshop features that reduce downtime

The step range from 6.3–25.0 mm provides flexibility across typical chamfering tasks without frequent tool swaps. Each set is supplied in a protective plastic cassette, simplifying organisation and ensuring fast identification on the tool trolley. The standardised shank form and DIN conformity make integration with existing workholding straightforward, which minimises setup time and maintains cycle stability on production lines and jobbing benches alike.

Proven supply and expert support for industrial buyers

Ruko’s manufacturing pedigree paired with Metav’s distribution approach ensures reliable access and informed purchasing. Metav Werkzeuge acts as a quality filter for the European market, supplying a comprehensive range of precision tools and workshop equipment with demonstrated trust from over 48,000 customers and a catalogue exceeding 250,000 items. For clarification on machining parameters or material compatibility, technical enquiries can be directed to Metav Werkzeuge at info@metav-werkzeuge.com or by phone on +49 2822 7131930.

Choose the Ruko ULTIMATECUT 4S countersink set for robust, DIN‑compliant 90° chamfering and order through Metav Werkzeuge for reliable supply and expert advice — contact Metav Werkzeuge at info@metav-werkzeuge.com or +49 2822 7131930 to discuss suitability for specific applications

Technical data

• Article number: 4000605565NW
• Name: ULTIMATECUT 4S countersink set 90° (6.3–25.0 mm)
• Manufacturer: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen
• Packaging unit: 1
• UID: 4000605565NW

Core specifications

• Angle: 90°
• Size range: 6.3–25.0 mm
• Material: HSS‑Co5
• Standard: DIN 355
• Shank: cylindrical
• Cutting direction: right‑hand

Applications & features

• Coating: RUnaTEC
• Suitable for: high‑strength steels; stainless steel V2A; structural steel; aluminium; plastics
• Packaging: plastic cassette
• Set type: stepped countersink set

FAQ

What materials can be machined with this countersink set?
The Ruko ULTIMATECUT 4S countersink set is suitable for high‑strength steels, stainless steel (V2A), structural steel, aluminium and assorted plastics as specified in the technical data.

Does the geometry comply with recognised standards?
Yes, the set features a 90° geometry manufactured to DIN 355, ensuring consistent chamfer angles for standardised assemblies.

How is the set supplied for workshop storage?
The items are supplied in a protective plastic cassette to aid organisation and secure transport.

Which shank type is used and is it compatible with standard holders?
A cylindrical shank is used for secure clamping; this form is compatible with common collet and chuck systems in workshop environments.

Is the coating suitable for high‑temperature cutting conditions?
The RUnaTEC coating enhances wear resistance and contributes to extended service life under elevated cutting temperatures when used on the listed materials.

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