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

High-performance HSS countersink with RUnaTEC coating and a four‑flute geometry reduces feed force and enables up to 50% faster chamfering in both machine and manual settings; order the tool directly via Metav Werkzeuge or consult our specialists for application support.

Ruko ULTIMATECUT 4S 90° Countersink (23 mm) — HSS, RUnaTEC-coated

The ULTIMATECUT 4S is a 90° countersink for fast, chatter‑free chamfering of steel, designed for both stationary and manual workshop use.

• Countersink 90° for clean chamfers
• 4‑flute HSS design for fast material removal
• RUnaTEC coating for extended tool life

Fast, measurable performance for production workflows

The ULTIMATECUT 4S combines HSS base material with a RUnaTEC coating and a 4 flutes geometry to deliver consistent cutting performance. This configuration reduces the required feed force and allows productive chamfering rates — the tool achieves a feed in steel (up to 800 N) of 0.22 mm/rev, which translates into noticeably shorter cycle times. The specification DIN 335 C confirms the geometric standard for conical countersinks, providing a clear reference point for process planning and quality control.

Quiet running and reliable surface quality

Engineered for a stable cutting action, the tool’s geometry produces an chatter‑free finish and an optimal sink image without ratter marks, which reduces the need for rework. The shaft with 3 flats ensures secure clamping and repeatable concentricity in common chucks and collets, while the right‑hand cutting direction aligns with standard lathe and drill setups. The result is a smoother operator experience in manual work and reduced vibration during stationary machining, increasing throughput and part quality.

Practical compatibility and workshop advantages

With a nominal diameter of 23 mm and a 90° included angle, the countersink suits typical chamfering and deburring tasks for screw seats and mating surfaces. Conformity to DIN 335 C and the tool’s suitability for stationary and manual use make it a flexible choice across jobbing and production environments. The robust design and coated surface extend tool life, reducing tool changes and downtime — a direct gain for lean workflows and predictable output.

For demanding steelwork where speed and a chatter‑free finish are essential, request specialist advice or secure supply of the Ruko ULTIMATECUT 4S via Metav Werkzeuge — fast delivery from Emmerich and technical consultation available

Technical data

• Article number: 4000605555NW
• Product: Countersink ULTIMATECUT 4S, 23 mm, 90°
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Core specifications

• Diameter: 23 mm
• Countersink angle: 90°
• Cutting edges: 4
• Material: HSS
• Coating: RUnaTEC
• Feed in steel (up to 800 N): 0.22 mm/rev
• Standard: DIN 335 C

Special features

• Shaft with 3 flats
• Right‑hand cutting
• Designed for stationary and manual use
• Reduced feed force requirement
• Up to 3× more countersinks; up to 50% faster
• Quiet, chatter‑free finish

FAQ

What materials can be countersunk with this tool?
The Ruko ULTIMATECUT 4S is specified for steel applications; its HSS substrate and RUnaTEC coating make it particularly suited to steel chamfering tasks.

What does the 0.22 mm/rev feed value mean in practice?
The value indicates the recommended feed in steel at loads up to 800 N; using ~0.22 mm/rev helps to achieve efficient cutting and consistent sink quality with the ULTIMATECUT 4S.

Which clamping systems are compatible with this countersink?
The tool’s shaft with 3 flats is intended for secure holding in standard chucks and collets used in both handheld and stationary machining setups.

How does the RUnaTEC coating benefit workshop productivity?
The RUnaTEC coating increases wear resistance and often extends tool life, reducing tool changes and supporting longer production runs with fewer interruptions.

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