16.5mm Countersink UltimateCut 90° HSSE-Co 5-Flute Reduced-Force, High Wear Resistance - Ruko GmbH

Benefit from a countersink that combines the HSSE‑Co 5 alloy and an advanced cutting geometry to reduce axial and radial forces, giving quieter, burr‑free results and extended tool life; order the ULTIMATECUT directly via Metav Werkzeuge or consult our specialists for process optimisation.

ULTIMATECUT countersink Ø16.5 mm, 90° – HSSE‑Co 5, 3‑flute (RUKO)

The ULTIMATECUT is a DIN 335C 90° countersink designed for precision deburring and chamfering, optimised for a wide range of materials and cutting speeds

• Reduced axial and radial cutting forces
• Smooth, chatter‑free countersink finish
• Extra‑wide flute for efficient chip removal
• HSSE‑Co 5 for high wear resistance

Fewer interruptions, cleaner results through advanced geometry

The newly developed cutting geometry significantly reduces axial and radial forces during countersinking, which lowers the required feed effort and stabilises the process. A variably profiled relief leads to a quiet, round and rattle‑free finish, reducing the need for secondary deburring and cutting rework. This translates into fewer machine stops and a more predictable production rhythm for daily workshop operations.

Longer tool life and reliable heat management for higher productivity

Manufactured from HSSE‑Co 5, the tool combines toughness with thermal resilience so that wear is minimised under fluctuating conditions. The design features an extra‑wide flute and optimised chip‑space geometry for fast chip evacuation and improved heat dissipation. The result is extended tool life, reduced replacement frequency and a lower cost per hole when used in standard industrial workflows.

Process flexibility across materials and speeds with consistent outcomes

Compliant with DIN 335C and specified as a 90° countersink with 3 flutes, the tool achieves consistent chamfers and deburring across many substrates. The geometry counteracts material build‑up and allows operation at both high and low cutting speeds without sacrificing surface quality. Where a defined feed is needed, the tool performs in steel at feeds up to 800 N with approximately 0.2 mm/rev, offering a reproducible reference point for machining parameter setup.

For tailored technical advice or to order the RUKO ULTIMATECUT countersink (SKU 8000422464NW), contact Metav Werkzeuge by e‑mail at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical Data

• Article number: 8000422464NW
• Product: ULTIMATECUT countersink, DIN 335C, 90° Ø 16.5 mm
• Manufacturer: Ruko GmbH Präzisionswerkzeuge
• Packaging unit: 1

Facts

• Diameter: 16.5 mm
• Angle: 90°
• Flutes: 3
• Material: HSSE‑Co 5
• Feed in steel up to 800 N: 0.2 mm/rev

Special features

• New cutting geometry reduces axial and radial forces
• Variable relief for quiet, round, rattle‑free finish
• Extra‑wide chip flute for chip and heat evacuation
• High wear resistance; suitable at high and low cutting speeds
• Minimised material welding and lower feed forces

FAQ

What materials can be processed with this countersink?
The ULTIMATECUT countersink from RUKO is designed to perform across a wide range of materials; its HSSE‑Co 5 composition and flute geometry enable reliable countersinking in steels and many non‑ferrous materials while keeping wear low.

How does the new geometry improve surface quality?
The specially developed cutting geometry and variable relief produce a quieter sinking action that yields a round, rattle‑free finish, so the ULTIMATECUT produces cleaner chamfers and reduces the need for manual finishing.

What cutting data should be used as a starting point?
As a reference, the RUKO ULTIMATECUT (SKU 8000422464NW) achieves stable results in steel with feed conditions up to 800 N at around 0.2 mm per revolution; adapt spindle speed and feed to material and machine rigidity.

How many flutes does the tool have and why does it matter?
The tool features three flutes (Z.3), which balance cutting engagement and chip evacuation; this supports steady cutting forces and efficient removal of swarf to maintain surface quality.

Is the tool suitable for high‑speed countersinking?
Yes. The combination of HSSE‑Co 5 and optimised chip geometry allows effective countersinking at both high and low cutting speeds without compromising the quality of the countersink.

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