31mm Countersink 90° HSS-E-Co Multi-Flute Smooth Cut, 5 Flutes - Ruko GmbH

Reduced axial and radial forces together with the HSS‑E Co tool steel and an extra‑wide chip gullet result in long service life and consistently precise chamfers; order the ULTIMATECUT directly via Metav Werkzeuge or ask our consultants if needed.

ULTIMATECUT 90° Conical Countersink D31 mm (DIN 335C) – HSS‑E Co, RUKO

The ULTIMATECUT conical countersink is engineered for quiet, rattle‑free chamfering and robust performance across workshop and production environments.

• Reduced axial and radial cutting forces
• Variable relief grind for smooth, chatter‑free finish
• Extra‑wide chip gullet for efficient chip evacuation
• HSS‑E Co high‑wear resistance for long tool life

Quieter machining through optimised cutting geometry

The newly developed cutting geometry reduces both axial and radial forces, so the machining process runs noticeably smoother with less vibration. A variably contoured relief grind ensures a chatter‑free, round surface on the countersink and significantly less operator effort during feed. For production environments this means fewer rejects and more consistent part quality; the advanced geometry also counteracts material welding to the cutting edges, maintaining surface integrity even on challenging jobs.

Efficient chip and heat management for longer lifetime

Wide chip gullets and finely tuned chip space parameters — such as rake angle and transition radii — ensure rapid chip evacuation and effective heat dissipation. This reduces thermal wear and extends tool life while preserving the quality of the countersink. The combination of improved chip flow and a larger gullet lowers clogging risk and helps maintain dimensional accuracy over extended runs, supporting reliable throughput in mixed‑batch machining.

High‑grade tool steel and versatile speed capability

Constructed from HSS‑E Co, the countersink offers elevated wear resistance and toughness compared with standard high‑speed steels. The geometry allows operation at both high and low cutting speeds without loss of edge quality, providing flexibility for different machine setups and material types. This adaptability supports both hand‑fed and CNC applications where consistent chamfer quality is required and tool replacement intervals must be predictable.

Productivity gains and application scope

Designed to deliver the best performance across a wide range of applications, the countersink produces precise, burr‑free chamfers with reduced feed force and improved surface finish. The reduced need for correction work and re‑processing translates into measurable time savings on the shop floor. When combined with Metav’s distribution reliability, the tool supports a workflow that is both efficient and dependable in daily production.

For durable, precision countersinking choose RUKO’s ULTIMATECUT and contact Metav Werkzeuge for ordering and technical advice: info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 8000422469NW
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Numbers / Core technical data

• Diameter: 31 mm
• Countersink angle: 90°
• Number of flutes: 3
• Recommended feed in steel (up to 800 N): 0.2 mm/rev

Special features / Design

• DIN 335C standard
• Material: HSS‑E Co (solid cobalt high‑speed steel)
• Variable relief geometry for low cutting forces
• Extra‑wide chip gullet and optimised chip evacuation
• Geometry reduces material welding and vibration
• Suitable for both high and low cutting speeds

FAQ

What angle does the countersink have and for which tasks is it suited?
The tool features a 90° countersink angle and is suited for producing precise chamfers and deburring in workshop and production environments with an emphasis on smooth, rattle‑free finishes.

Which material is the cutter made from and what does that mean for tool life?
Made from HSS‑E Co, the cutter provides improved wear resistance and toughness; this supports longer service life and reliable performance on repetitive machining tasks.

How does the geometry affect machining forces and finish quality?
The specially developed variable relief geometry reduces axial and radial forces, resulting in lower feed effort and a chatter‑free, round countersink surface that minimises rework.

Can the countersink handle different spindle speeds?
Yes, the design allows operation at both high and low cutting speeds without compromising the quality of the countersink, making it flexible for various machine setups.

What is the article number for ordering or reference?
The article number (SKU) is 8000422469NW and should be used when enquiring with Metav Werkzeuge or when placing an order.

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