6.3-20.5mm 90° Countersink Set HSS-Co5, Right-Hand Cylindrical Shank, RUnaTEC Coating, DIN 355 - Ruko GmbH

Durable, DIN‑compliant countersinks with a HSS‑Co5 composition and RUnaTEC coating deliver consistent 90° chamfers and extended tool life; the cylindrical shank and right‑cutting geometry ensure predictable chip flow and secure clamping. Order the set directly via Metav Werkzeuge or consult the technical advisors for compatibility with production processes.

ULTIMATECUT 4S Countersink Set — 90° HSS‑Co5, 6.3–20.5 mm (Ruko)

ULTIMATECUT 4S Countersink Set is a 90° high‑speed steel countersink collection designed for precise chamfering and deburring across workshops and light production environments.

• RUnaTEC coating for extended tool life
• DIN 355 standardised geometry
• HSS‑Co5 for stainless and steel
• Cylindrical shank, right‑cutting design

Precision chamfers that last in production

The set uses HSS‑Co5 (high‑speed steel with 5% cobalt) to maintain edge stability when working with tougher alloys. The 90° point angle, manufactured to DIN 355, produces reliable chamfers for countersinking and deburring, reducing rework and improving assembly fit. The RUnaTEC coating increases resistance to wear and heat, which translates into longer intervals between tool changes and fewer production interruptions — a practical efficiency advantage for busy workshops and small‑batch production.

Ready for a wide range of materials and tasks

Engineered as a right‑cutting tool with a cylindrical shank, the set ensures secure clamping and consistent cutting action in drill chucks or collets. The geometry and substrate make the tooling suitable for stainless steel (V2A), structural steel, aluminium and common plastics, allowing one set to cover multiple applications. The right‑hand cutting direction supports conventional machinist workflows and provides predictable chip evacuation, which helps maintain surface quality and reduces the need for secondary finishing.

Organised tooling for faster setup and repeatability

Covering the range 6.3–20.5 mm, the collection removes the need to swap individual cutters for common hole sizes, saving setup time and simplifying job planning. Delivered in a plastic case, the set is easy to store and transport between workstations while protecting cutting edges from damage. As a compact countersink set, it supports repeatable chamfer dimensions across batches, contributing to stable quality and a leaner workflow in assembly or fabrication tasks. The combination of standard conformity and protective coating supports predictable life‑cycle costs and fewer unscheduled stoppages.

For dependable chamfering in stainless and structural steels, choose the Ruko ULTIMATECUT 4S with RUnaTEC coating — contact Metav Werkzeuge for product advice and reliable supply from Emmerich: info@metav-werkzeuge.com / +49 2822 7131930.

Technical data

• Article number: 4000605562NW
• Label: ULTIMATECUT 4S countersink set, 90° 6.3–20.5 mm

Facts

• Angle: 90°
• Size range: 6.3–20.5 mm
• Standard: DIN 355

Special features

• Coating: RUnaTEC
• Material: HSS‑Co5
• Shank: cylindrical shank
• Cutting direction: right‑cutting
• Packaging: plastic case

FAQ

Which materials are suitable for these countersinks?
The ULTIMATECUT 4S countersink set is specified for stainless steel (V2A), structural steel, aluminium and common plastics thanks to the HSS‑Co5 substrate and the tool geometry.

What angle and standard do the cutters follow?
The cutters are 90° and manufactured to DIN 355, ensuring consistent chamfer geometry for typical fastening and finishing tasks.

How is the set supplied and stored?
The set is supplied in a protective plastic case that organises the 6.3–20.5 mm sizes and protects the cutting edges during storage and transport.

Does the coating improve tool life significantly?
The RUnaTEC coating increases wear and heat resistance, extending service life and reducing the frequency of tool changes in demanding applications.

Can the cutters be used in standard drill chucks?
Yes; the cylindrical shank design is compatible with standard drill chucks and collets, offering secure clamping for workshop setups.

Metav IndustryLine: Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com