10.4mm Countersink 90° HSS Four-Flute RUnaTEC Coated With 3-Flatted Shank, Right-Hand Cutting - Ruko GmbH

Benefit from a combination of HSS construction, RunaTEC coating and a 4-flute geometry for faster, quieter countersinking with reduced feed force; the result is more consistent chamfers and longer tool life. Order the RUKO ULTIMATECUT 4S via Metav Werkzeuge or consult our technical team for precise application advice.

RUKO ULTIMATECUT 4S Countersink, 90° HSS, RUnaTEC, Ø10.4 mm

The RUKO ULTIMATECUT 4S is a 90° HSS countersink with RUnaTEC coating, designed for fast, quiet chamfering in both stationary and manual operations

• HSS with RUnaTEC coating for long tool life
• 4 cutting edges for fast, smooth chamfering
• 90° countersink angle for standard chamfers
• Reduced feed force; up to 50% faster machining

Faster results with less feed force

The four‑flute geometry combined with HSS substrate and RunaTEC coating reduces cutting resistance, which lowers the necessary feed force and speeds up production. In practice this means more countersinks per shift and shorter cycle times: the cutter achieves 0.13 mm/rev in steel up to 800 N, enabling steadier throughput in both bench and stationary setups. The design is optimised for constant chip evacuation and stable cutting, so process reliability improves while operator effort decreases.

Consistent chamfer quality and quiet running

A true benefit of the tool is the 90° countersink geometry and the balanced four‑edge arrangement, which produce an optimal chamfer finish without rattle marks. The construction yields an extremely quiet run, reducing vibration-induced surface defects and the need for rework. For applications where visual quality or exact joint fit are critical, this tool delivers repeatable results and a clean edge profile, reducing downstream finishing work.

Robust cutting performance and extended lifetime

The combination of a hardened high‑speed steel core and the proprietary RunaTEC coating improves wear resistance under demanding conditions. The cutter is right‑hand cutting, conforms to DIN 335 C, and features a shank with three clamping flats for secure gripping in chucks or collets. These elements contribute to longer service intervals and fewer tool changes, which lowers overall operating costs and supports uninterrupted production runs.

Practical applications and handling guidance

Suitable for both manual countersinking and machine use, the tool excels on common workshop materials such as steels handled within the stated feed range. The robust geometry allows controlled feed rates in stationary equipment while remaining forgiving during hand‑held operation, provided standard clamping precautions are observed. For best results, match spindle speeds and feeds to material hardness and always ensure firm clamping via the three flats to avoid slippage and maintain concentricity.

Contact Metav Werkzeuge today to discuss how the RUKO ULTIMATECUT 4S can speed up production with quieter, cleaner countersinking or to request bespoke application guidance at info@metav-werkzeuge.com

Technical data

• Article number: 4000605549NW
• SKU/UID: 4000605549NW / 4000605549NW
• Product label: Kegelsenker ULTIMATECUT 4S DIN 335C 90Grad D.10,4mm HSS RUnaTEC Z.4 RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Numbers / Facts

• Diameter: Ø10.4 mm
• Countersink angle: 90°
• Number of cutting edges: 4
• Feed in steel up to 800 N: 0.13 mm/rev

Special features / Versions

• Material: High‑speed steel (HSS)
• Coating: RUnaTEC coating
• Standard: DIN 335 C
• Shank with 3 clamping flats
• Right‑hand cutting
• Designed for stationary and manual use
• Advantages listed: quieter run, fewer reworks, up to 3× more countersinks, up to 50% faster countersinking

FAQ

What is the recommended application for this countersink?
The RUKO ULTIMATECUT 4S is intended for fast chamfering in both stationary machines and manual operations, particularly where a 90° countersink and high surface quality are required.

Which materials can be processed with this tool?
This countersink is optimised for common steels within the stated feed range (up to 800 N) and performs well in applications demanding reliable chamfer finishes.

How does the RUnaTEC coating help in production?
The RUnaTEC coating increases wear resistance and lowers friction, which extends tool life and supports higher machining speeds with reduced feed force.

Is the shank suitable for standard chucks and collets?
Yes, the shank with three clamping flats ensures secure gripping in standard chucks and collets, improving concentricity and preventing slippage during use.

Does the tool conform to industry standards?
The geometry and designation follow DIN 335 C, making the tool suitable for standardised countersinking tasks in industrial settings.

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