25mm Countersink 90° HSSE-Co Three-Flute Reduced Cutting Forces - Ruko GmbH

Reduced axial and radial forces combined with an extra-wide chip flute and optimised relief deliver quieter, more consistent chamfers and extended tool life; order the ULTIMATECUT countersink directly via Metav Werkzeuge or consult our specialists for application advice.

RUKO ULTIMATECUT DIN 335C 90° Countersink, Ø25 mm (HSSE‑Co 5)

The ULTIMATECUT countersink is a 90° DIN 335C tool for producing precise, rattle‑free chamfers and deburring in a wide range of workshop and industrial applications.

*Reduced axial and radial cutting forces
*Extra-wide chip flute for efficient chip evacuation
*Quiet, rattle-free surface finish
*Suitable for high and low cutting speeds

Consistent, low-force chamfering for repeatable quality

The redesigned cutting geometry reduces axial and radial forces, which directly lowers the feed effort required during the countersinking operation. The variable relief profile produces a smooth, rattle‑free chamfer that is round and dimensionally consistent, making it suitable where repeatability matters. This engineering reduces vibration and tool deflection, so the result is a clean chamfer without excessive manual correction or rework.

Improved chip flow and heat management to extend tool life

A combination of optimised chip‑space parameters — including the extra-wide chip flute, tailored chip angle and transition radius — promotes reliable chip evacuation and heat dispersal. Better evacuation minimises material welding on the cutting edges and reduces thermal stress, contributing to superior wear resistance. For operations sensitive to tool life and process stability, these features translate into fewer tool changes and more productive machine time.

Versatile performance across many materials and speeds

The ULTIMATECUT is engineered to maintain chamfer quality at both high and low cutting speeds, so material flexibility is maximised without sacrificing finish. The geometry counters tendency for material build-up and allows efficient machining with reduced feed force, which is especially beneficial on manual setups and semi‑automated processes. This versatility means the cutter performs well in diverse workshop environments and a broad range of component materials.

For reliable, low‑force countersinking choose RUKO’s ULTIMATECUT — contact Metav Werkzeuge for application guidance and supply directly from Emmerich.

Technical data

• Article number: 8000422468NW
• Description: ULTIMATECUT countersink, DIN 335C, 90°, Ø25 mm, HSSE‑Co 5, 3 flutes
• Manufacturer: Ruko GmbH
• Packaging unit: 1
• UID: 8000422468NW

Core specifications

• Diameter: 25 mm
• Countersink angle: 90°
• Standard: DIN 335C
• Material grade: HSSE‑Co 5
• Number of flutes: 3
• Recommended feed in steel (up to 800 N): 0.2 mm/rev

Special features

• New cutting geometry reducing axial and radial forces
• Variable relief for calm, rattle‑free operation
• Extra‑wide chip flute for optimal chip and heat removal
• Geometry designed to counter material welding
• Lower feed force required during countersinking
• Suitable for high and low cutting speeds
• Delivers precise, round chamfer surfaces

FAQ

Which materials can this countersink be used on?
The ULTIMATECUT countersink from RUKO is designed for versatile use and achieves strong performance across a wide array of materials, maintaining chamfer quality at both high and low cutting speeds.

What are the tool’s angle and diameter specifications?
The cutter is a 90° countersink with a diameter of 25 mm, produced to DIN 335C dimensions for standardised chamfering.

How does the new geometry improve countersinking results?
The revised cutting geometry reduces axial and radial forces and uses a variable relief to produce quiet, rattle‑free chamfers while lowering the tendency for material welding at the cutting edge.

What feed rate is recommended for steel?
For steel applications the ULTIMATECUT can be fed at approximately 0.2 mm per revolution under feed forces up to 800 N, as guidance for stable, efficient cutting.

Is the tool suitable for high-speed machining?
Yes, the ULTIMATECUT maintains chamfer quality at both high and low cutting speeds, allowing flexible integration into varied machining strategies.

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