6.3-20.5mm Countersink Set DIN 335 90° HSSE-Co5 UltraCut 6-Piece Plastic Case - Ruko GmbH

Take advantage of a countersink set that combines precise, rattle‑free chamfers with high wear resistance and efficient chip evacuation; the design minimises axial and radial loads, reducing required feed force and ensuring consistent results in demanding production settings. Order directly via Metav Werkzeuge or contact the consultants for tailored advice.

Kegelsenkersatz DIN 335 90° ULTIMATECUT 6.3–20.5 mm HSS‑E Co5 by Ruko — 6‑piece countersink set with optimised cutting geometry

A Kegelsenkersatz DIN 335 90° ULTIMATECUT 6.3–20.5 mm HSS‑E Co5 set engineered for smooth, precise countersinking across a wide range of workshop and industrial applications, supplied in a protective plastic case

• New cutting geometry reduces axial and radial forces
• Smooth, vibration‑free finish on the countersink
• Optimised chip evacuation and heat dissipation
• High wear resistance for varied cutting speeds

Precise, repeatable countersinking for consistent assembly quality

The set delivers DIN 335‑compliant 90° countersinks made of HSS‑E Co5, engineered to produce a smooth, vibration‑free finish that requires less feed force. The redesigned cutting geometry reduces both axial and radial forces, so the tool runs more stably during the chamfering process; this directly benefits repeatability in production and reduces operator fatigue when performing manual operations. For users unfamiliar with cutting‑edge geometry, the effect is simple: smaller forces mean steadier motion, which yields consistently round, burr‑free chamfers suitable for subsequent fastening or adhesive bonding.

Engineered chip control and thermal management for extended tool life

A combination of variable relief and carefully dimensioned flute geometry provides effective chip evacuation and heat dissipation, key contributors to the set’s wear resistance. The enlarged flute cross‑section and optimised chip angles prevent material build‑up at the cutting edge, reducing the tendency for material welding and flank wear. The result is a longer service interval between regrinds or replacements and stable performance under both interrupted and continuous cuts. For production environments where tool changeover costs are critical, this engineering reduces downtime and maintains surface quality over prolonged runs.

Versatile performance across cutting speeds and applications

The cutters are designed to perform well at both high and low cutting speeds without compromising the quality of the countersink. This versatility allows the set to be integrated into varied machining tasks—handheld drilling, drill‑press operations or CNC deburring—where stable chamfers are required. Supplied in a robust plastic case, the set is organised for safe storage and quick selection, supporting efficient workflow on the shop floor. The overall design emphasises reliable, predictable outcomes that support quality control and reduce rework.

For tailored technical advice or to secure a supply of this Ruko ULTIMATECUT countersink set for production use, contact Metav Werkzeuge to discuss specifications, lead times and compatibility with existing processes.

Technical Data

• Article number: 8000422527NW
• Label: Kegelsenkersatz DIN 335 90Grad ULTIMATECUT 6,3-20,5mm HSSE-Co 5 RUnaTEC 6-tlg.
• Manufacturer: Ruko GmbH

Facts

• Standard: DIN 335
• Angle: 90°
• Size range: 6.3–20.5 mm
• Pieces: 6

Special features

• HSS‑E Co5 material
• Newly developed cutting geometry
• Variable relief for quiet operation
• Wide flute for optimised chip evacuation
• Improved heat dissipation and wear resistance
• Reduced axial and radial forces
• Supplied in plastic case

FAQ

What angle do the countersinks have?
The set features 90° countersinks in accordance with DIN 335, supplied as the ULTIMATECUT 6.3–20.5 mm set by Ruko (SKU 8000422527NW).

What material are the cutters made from?
The cutters are manufactured from HSS‑E Co5, chosen for a balance of hardness and toughness that supports durable countersinking performance.

How does the ULTIMATECUT improve chip removal?
A deliberately widened flute and optimised chip‑angle geometry in the ULTIMATECUT range promote reliable chip evacuation, reducing heat build‑up and lowering the risk of material welding at the cutting edge.

Can these countersinks be used at high cutting speeds?
Yes, the geometry and flute design allow effective operation at both high and low cutting speeds while maintaining a consistent surface finish.

What is included in the delivery?
Delivery comprises the 6‑piece ULTIMATECUT countersink set packaged in a protective plastic case for safe storage and easy selection.

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