15mm Countersink 90° HSSE-Co 5-Flute UltimateCut, High Wear Resistance - Ruko GmbH

Take advantage of the ULTIMATECUT's combination of reduced axial and radial forces, optimised chip evacuation and high wear resistance for quieter, more precise countersinking and longer tool life. Order the tool directly via Metav Werkzeuge or consult the team for application guidance.

RUKO ULTIMATECUT Countersink DIN 335C — 90° D15mm, HSSE‑Co

RUKO ULTIMATECUT DIN 335C 90° countersink designed for smooth, precise chamfers across a wide range of materials and cutting speeds.

Reduced axial and radial cutting forces
Extra-wide flute for efficient chip evacuation
Quiet, vibration-free countersinking
High wear resistance for extended service life

Consistent, chatter-free chamfers for reliable results

The ULTIMATECUT countersink delivers a notably calm cutting action thanks to a completely reworked cutting geometry that reduces both axial and radial forces during the countersinking operation. The specially developed, variably profiled relief produces a steady, rattle-free movement, which in turn creates an exactly round and burr-free countersink surface. For production environments this means fewer rejects, reduced rework and a stable process window when producing precision chamfers to DIN 335C standards.

Efficient chip and heat management to extend tool life

A combination of optimised chip-space parameters — including the span angle, transition radius and an extra-wide flute — ensures superior chip evacuation and heat dissipation. This lowers thermal load on the cutting edges and reduces the risk of material welding to the tool, resulting in improved wear resistance and longer service intervals. The geometry allows both high and low cutting speeds without compromising the finish, which supports flexible machining strategies in mixed-production shops.

Versatility across materials and cutting conditions

The tool is manufactured from HSSE‑Co, offering a balance of toughness and hardness suitable for a wide variety of workpiece materials. The ULTIMATECUT achieves high performance across many applications and permits machining with varied feed and speed settings; the recommended feed in steel at up to 800 N is 0.15 mm/rev, providing a practical baseline for process setup. The reduced requirement for feed force also makes the countersink appropriate for both manual and CNC operations where tool stability and repeatability matter.

Productivity and process stability in everyday use

By lowering the required thrust force during the countersink cycle and counteracting material adhesion, the tool reduces spindle load and operator strain while increasing throughput. The result is a quieter, vibration‑reduced process that maintains surface quality even under longer runs. For workshops and industrial users alike, this translates into tangible productivity gains and a dependable component quality that supports downstream assembly and finishing operations.

For precise, low-force countersinking with excellent chip control, contact Metav Werkzeuge to check stock of the RUKO ULTIMATECUT and discuss specific application parameters by e‑mail at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• SKU: 8000422463NW
• Label: Kegelsenker ULTIMATECUT DIN 335C 90Grad D.15mm HSSE-Co 5 RUnaTEC Z.3 RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1
• UID: 8000422463NW

Core technical data

• Diameter: 15 mm
• Countersink angle: 90°
• Cutting edges: 3
• Material: HSSE‑Co
• Recommended feed in steel up to 800 N: 0.15 mm/rev

Special features

• Reworked cutting geometry
• Variable relief for smooth cutting
• Extra-wide flute for chip evacuation
• Optimised span angle and transition radius
• Reduced tendency for material welding
• Suitable for high and low cutting speeds
• Quiet, rattle-free countersinking
• Enhanced wear resistance

FAQ

What materials can be machined with this countersink?
The RUKO ULTIMATECUT countersink is designed to perform well in a wide range of materials; its HSSE‑Co composition and geometry enable effective countersinking across steels and many other workpiece materials.

Which standards and dimensions does the tool follow?
The tool is produced to DIN 335C form with a 90° countersink angle and a diameter of 15 mm, as indicated on the product label and technical data.

How does the ULTIMATECUT reduce chatter and improve surface quality?
The specially developed variable relief and refined cutting geometry lower axial and radial forces, resulting in a calm cutting action that produces round, burr-free countersinks and a quieter process.

Is the countersink suitable for high-speed machining?
Yes. The geometry of the RUKO ULTIMATECUT supports both high and low cutting speeds without loss of finish quality, while optimised chip evacuation helps manage heat and wear.

What feed should be used as a starting point when countersinking steel?
A practical starting guideline is the recommended feed of 0.15 mm/rev in steel at workpiece forces up to 800 N, which balances material removal and surface finish.

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