23mm Countersink HSS 90° 4-Flute RUnaTEC Coating, Right-Hand Shank With 3 Flats - Ruko GmbH

Take advantage of the combination of HSS cutting performance and RunaTEC coating for faster, quieter countersinking with a clean finish; reduced feed force and improved throughput make this an efficient choice. Order the countersink directly via Metav Werkzeuge or consult the Metav team for tailored advice.

Countersink ULTIMATECUT 4S – HSS, RUnaTEC-coated, 90° Ø 23 mm by RUKO

Countersink ULTIMATECUT 4S is a precision conical countersink designed for efficient steel chamfering and deburring in both stationary and manual machining operations.

• HSS with RUnaTEC coating
• 90° angle for standard chamfers
• Four cutting edges for smooth finish
• Shank with three clamping flats

Faster, cleaner countersinking for steel components

The ULTIMATECUT 4S countersink combines a high-speed steel (HSS) substrate with a RunaTEC coating to reduce friction and heat generation during cutting. This results in up to 50% faster countersinking and enables up to three times more countersinks before reconditioning, providing clear productivity gains on batch and single-part production. The tool geometry and balanced flute design lower the required feed force, which improves tool life and reduces strain on smaller hand-fed machines. The conical 90° angle and precision ground flutes deliver a reproducible chamfer profile that supports consistent assembly fit and visual quality in end parts.

Stable clamping and vibration‑free operation for reliable surface quality

A shank equipped with three clamping flats ensures secure holding in collets and chucks, preventing rotation and axial slip under load. The tool’s right‑hand cutting geometry and four‑flute layout contribute to an extremely quiet running characteristic and greatly reduced tendency to leave chatter marks. The outcome is an optimal countersink surface that minimises rework and improves downstream processes such as coating or welding. These mechanical advantages are particularly relevant when working on manual machines or lighter production rigs where stability is a priority.

Coating and geometry explained: why it matters on the shop floor

The RunaTEC surface treatment enhances wear resistance and reduces built‑up edge, which is especially beneficial when machining medium‑strength steels. Conforming to DIN 335 C dimensions and offering a nominal diameter of 23 mm, the tool balances chip evacuation and cutting stability to maintain clean chamfers even under intermittent plunging. A recommended feed in steel at cutting forces up to 800 N is 0.22 mm per revolution, which supports predictable material removal rates and facilitates process planning. For purchasers seeking a tool that performs in both heavy and manual duty scenarios, this geometry and coating combination represents a pragmatic choice that lowers operational variability.

Practical advantages for production and maintenance workflows

The countersink’s four‑edge configuration distributes cutting forces across multiple teeth, which reduces individual tooth wear and extends the effective service life. The result is fewer tool changes and higher net machining time. The tool’s compatibility with standard 90° chamfer requirements simplifies integration into existing setups without the need for special fixtures. In environments where throughput and repeatability matter, the combination of HSS, coating and robust shank design supports a measurable increase in output while maintaining component quality.

For procurement or application support concerning the RUKO ULTIMATECUT 4S countersink, contact Metav Werkzeuge for expert guidance and direct supply from Emmerich.

Technical data

• Article number: 4000605555NW
• Label: Kegelsenker ULTIMATECUT 4S DIN 335 C 90° D.23 mm HSS RUnaTEC Z.4 RUKO
• Manufacturer: Ruko GmbH Präzisionswerkzeuge
• Packaging unit: 1

Facts

• Diameter: 23 mm
• Countersink angle: 90°
• Cutting edges: 4
• Feed in steel (≤800 N): 0.22 mm/rev
• Standard: DIN 335 C

Special features

• Material: HSS
• Coating: RUnaTEC
• Shank with 3 clamping flats
• Right‑hand cutting
• Best performance in stationary and manual machining
• Reduced feed force required
• Up to 3× more countersinks possible
• Up to 50% faster countersinking
• Extremely quiet running
• Optimum countersink surface without chatter marks

FAQ

What materials can be machined with this countersink?
The RUKO ULTIMATECUT 4S is engineered primarily for steel work; the HSS substrate and RUnaTEC coating support efficient chamfering of carbon and alloy steels.

What feed rate is recommended for reliable results?
For cutting forces up to 800 N a feed of approximately 0.22 mm per revolution is indicated to balance surface quality and tool life when countersinking steel components.

How does the RUnaTEC coating improve performance?
The RUnaTEC coating reduces friction and adhesion on the cutting edges, which lowers heat buildup and built‑up edge formation, extending form stability and enabling higher speeds.

Is the shank suitable for standard chucks and collets?
Yes; the shank with three clamping flats provides secure seating in typical chucks and collets, preventing slippage during manual or stationary operations.

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