20.5mm Countersink 90° HSS-E Co 5 Flute Three-Point, Variable Relief Geometry - Ruko GmbH

Take advantage of the ULTIMATECUT design to cut chamfers with far lower axial and radial loads while maintaining a smooth, rattle‑free finish; its wide flute and optimised relief deliver efficient chip and heat removal and a long tool life. Order the RUKO countersink directly via Metav Werkzeuge or ask the Metav consultants for application advice.

RUKO ULTIMATECUT Countersink DIN 335C, 90° Ø20.5 mm, HSS‑E Co5

The ULTIMATECUT countersink is a 90° DIN 335C chamfering tool engineered for low‑force, high‑quality deburring and countersinking across diverse industrial applications.

• Reduced axial and radial forces in operation
• Quiet, vibration‑free chamfering result
• Extra‑wide flute for efficient chip and heat removal
• HSS‑E Co5 construction for enhanced wear resistance

Consistent, low‑force chamfering for repeatable results

The tool’s completely reworked cutting geometry reduces both axial and radial forces, which diminishes the required feed force during the countersinking process. This results in a smooth, rattle‑free surface of the chamfer and fewer rework cycles. The variable relief grind ensures a calm cutting action even where dimensional repeatability is critical, so the countersink delivers consistent edge quality and stable process behaviour on the shop floor.

Geometry and flute design that extend service life

A combination of an extra‑wide flute and optimised chipspace parameters — including flute helix and transition radii — promotes effective chip evacuation and heat dissipation, lowering wear rates. The tool’s geometry also counteracts material welding on the cutting edge, which contributes to prolonged tool life and predictable maintenance intervals. Built from HSS‑E Co5, the countersink provides a balance of toughness and hardness suitable for demanding production use.

Flexible cutting speeds and simplified machining setup

The tool performs reliably at both high and low cutting speeds without compromising chamfer quality, enabling process planners to adapt to different spindle speeds and setup constraints. The countersink is designed for efficient performance under typical industrial feeds (feed in steel up to 800 N: 0.2 mm/rev) and minimises machine load thanks to reduced cutting forces. These properties support cycle‑time optimisation and reduce the likelihood of fixture or part deformation in precise assemblies.

Contact Metav Werkzeuge for tailored advice on the RUKO ULTIMATECUT countersink and secure fast delivery from Emmerich—email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 8000422466NW
• Label: Kegelsenker ULTIMATECUT DIN 335C 90Grad D.20,5mm HSSE-Co 5 RUnaTEC Z.3 RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1
• UID: 8000422466NW

Core specifications

• Diameter: Ø 20.5 mm
• Angle: 90°
• Number of flutes: 3
• Feed in steel up to 800 N: 0.2 mm/rev
• Standard: DIN 335C

Special features

• HSS‑E Co5 material
• Newly developed cutting geometry reducing axial and radial forces
• Variable relief for quiet, rattle‑free chamfering
• Extra‑wide flute for optimised chip and heat evacuation
• Geometry minimises material welding on cutting edges
• Suitable for both high and low cutting speeds

FAQ

What materials can this countersink be used with?
The RUKO ULTIMATECUT countersink is engineered for broad applicability and achieves excellent performance in a wide range of materials and applications without sacrificing finish quality.

What feed and speed recommendations exist for the tool?
A practical reference is a feed in steel up to 800 N of 0.2 mm/rev; the ULTIMATECUT geometry allows operation at both high and low cutting speeds while maintaining chamfer quality.

How does the special flute design affect tool life?
The extra‑wide flute improves chip evacuation and heat dissipation, which reduces edge wear and the risk of material welding, thereby extending the effective service life of the countersink.

Can the countersink produce a burr‑free, repeatable chamfer?
Yes, the variable relief and reworked cutting geometry deliver a calm cutting action that produces a smooth, rattle‑free surface and enhances repeatability in serial production.

Is the tool suitable for demanding industrial cycles?
The combination of HSS‑E Co5 construction, optimised geometry and efficient chip removal makes the countersink well suited to continuous production use where tool life and surface consistency matter.

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