25mm Countersink 90° HSSE-Co Three-Point, Variable Relief Geometry, High Wear Resistance - Ruko GmbH

Take advantage of the combination of precise, low-force cutting and robust heat- and chip-management to achieve smooth, chatter-free countersinks in a wide range of materials; order directly via Metav Werkzeuge or contact their consultants for specific machining advice.

RUKO ULTIMATECUT Countersink (DIN 335C) — 90° · 25 mm · HSSE‑Co 5

The RUKO ULTIMATECUT countersink for controlled, low-force chamfering and high wear resistance in production and toolroom applications

• Reduced axial and radial forces
• Smooth, chatter-free countersinks
• Extra-wide flute for chip evacuation
• Reliable at high and low cutting speeds

Precision and stability from advanced cutting geometry

The ULTIMATECUT design relies on an advanced cutting geometry that markedly reduces axial and radial forces during the countersinking operation. The variable relief profile produces a very smooth countersinking action, which in turn creates an exact, round and chatter-free surface. Conforming to DIN 335C and with a 90° cutting angle at 25 mm diameter, the tool combines geometric stability with repeatable results suitable for both manual and CNC processes. The body material is HSSE‑Co 5, a cobalt-alloyed, high-speed steel that supports temperature resistance and edge stability.

Fewer interruptions thanks to optimised chip and heat removal

Specially developed flute and edge parameters — including the chip angle, transition radius and an extra-wide flute — promote efficient chip evacuation and faster heat dissipation, which extends tool life and ensures consistent surface quality. The geometry also minimises material adhesion to the cutting edges, reducing the tendency for welding and sticking. For reference, recommended feed behaviour in steel under loads up to 800 N corresponds to approximately 0.2 mm/rev, delivering stable cutting without sacrificing the finish. The construction enables operation at both high and low cutting speeds while maintaining the integrity of the countersink.

Practical benefits for production throughput and workshop reliability

Adopting this countersink supports reduced rework and faster cycle times: the quiet, low-force cutting decreases tool wear and reduces the need for secondary finishing, so throughput and part quality improve. The tool performs across a broad range of applications and materials, achieving high wear resistance and long service intervals. For procurement and maintenance planning, the robust HSSE‑Co 5 composition and optimised chip space mean fewer tool changes and predictable tool-life performance, helping to streamline production schedules and lower total operating costs.

Contact Metav Werkzeuge for technical consultation on the RUKO ULTIMATECUT countersink and to discuss application-specific recommendations or delivery from Emmerich.

Technical data

• Article number: 8000422468NW
• Product name: RUKO ULTIMATECUT countersink (DIN 335C) 90° D25 mm
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Data

• Diameter: 25 mm
• Cutting angle: 90°
• Standard: DIN 335C
• Feed guidance in steel (up to 800 N): 0.2 mm/rev

Special features

• Material: HSSE‑Co 5 (cobalt-alloyed high-speed steel)
• Newly developed cutting geometry reducing axial and radial forces
• Variable relief for calm, round, rattle-free countersinking
• Extra-wide flute and optimised chip angle for heat and chip evacuation
• Reduced tendency for material welding to the cutting edge
• Suitable for high and low cutting speeds; wide application range

FAQ

Which materials can this countersink be used on?
The RUKO ULTIMATECUT countersink is engineered for a wide range of materials and applications; its geometry and HSSE‑Co 5 construction support machining at both high and low cutting speeds without loss of surface quality.

Is the tool suitable for CNC and manual use?
Yes. The stable design and reduced cutting forces make the countersink appropriate for CNC toolpaths as well as manual deburring and chamfering operations.

What are the key dimensional and standard specifications?
The tool complies with DIN 335C, has a 90° cutting angle and a 25 mm diameter; these details are specified on the product label and technical data.

How does the new geometry improve tool life and surface finish?
The advanced geometry minimises axial and radial loads, while the extra-wide flute and optimised transition radius enhance chip evacuation and heat dissipation, resulting in improved wear resistance and a consistent, chatter-free finish.

What feed recommendation applies for steel?
Under conditions up to 800 N, a feed of approximately 0.2 mm per revolution is indicated for stable performance and consistent countersink quality.

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