6.3-25.0mm 90° Countersink Set HSS-Co5, Right-Hand Cylindrical Shank, RUnaTEC Coating, DIN 355 - Ruko GmbH

Benefit from the combination of HSS‑Co5 toughness, RUnaTEC surface treatment and a DIN 355‑grade 90° geometry for reliable, repeatable countersinking. Improve throughput with a toolset designed for stainless steel, construction steel, aluminium and plastics — order directly via Metav Werkzeuge or consult the team for application advice.

ULTIMATECUT 4S Countersink Set 90° HSS‑Co5 by Ruko — 6.3–25.0 mm, RUnaTEC coating

ULTIMATECUT 4S countersink set for precision deburring and 90° chamfering across common workshop materials

• RUnaTEC coating for extended tool life
• DIN 355 compliant 90° countersink
• HSS‑Co5 for stainless, steel and aluminium
• Supplied in a protective plastic case

Consistent precision and extended service life for production use

The ULTIMATECUT 4S countersink set combines HSS‑Co5 base material with a RUnaTEC coating, yielding enhanced hardness and thermal resistance compared with standard high‑speed steels. The 90° geometry, produced to DIN 355 dimensions, provides a predictable chamfer angle for screw seating and countersinking tasks, reducing rework and inspection effort. The cobalt content improves wear resistance when working at elevated cutting temperatures, which translates into longer tool life and fewer tool changes on the shop floor.

Proven versatility across stainless steel, structural steel, aluminium and plastics

Right‑hand cutting flutes and a cylindrical shank ensure stable chip evacuation and secure clamping in drill chucks or toolholders, reducing the risk of chatter during countersinking. The geometry and material treatment make the set suitable for stainless steel, aluminium and a range of plastics, enabling consistent edge formation and burr control across mixed production runs. Where a universal countersink is required for assembly preparation, this set delivers repeatable results and helps maintain component fit without over‑processing.

Practical packaging and workshop compatibility to speed up operations

Supplied in a plastic case, the set is arranged for immediate access, straightforward storage and minimal tool damage during transport. The DIN conformity supports straightforward replacement cycles and compatibility with existing process documentation, simplifying purchasing and inventory management. The combination of robust materials, standardised geometry and protective packaging reduces downtime associated with tool handling and promotes a cleaner, more organised workbench.

For factory‑grade countersinking reliability from Ruko, contact Metav Werkzeuge for technical guidance or to secure the ULTIMATECUT 4S set from stock.

Technical data

• Article number: 4000605561NW
• Product name: Kegelsenkersatz 90Grad ULTIMATECUT 4S 6,3-25,0mm HSS-Co5
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Core data

• Diameter range: 6.3–25.0 mm
• Angle: 90°
• Material grade: HSS‑Co5
• Standard: DIN 355

Special features

• RUnaTEC coating
• Cylindrical shank
• Right‑hand cutting
• Suitable for stainless steel (V2A), construction steel, aluminium, plastics
• Supplied in plastic cassette

FAQ

What materials can be processed with the ULTIMATECUT 4S countersink set?
The ULTIMATECUT 4S countersink set from Ruko is designed for stainless steel (V2A), construction steel, aluminium and various plastics, with the HSS‑Co5 composition and RUnaTEC coating aiding performance across these substrates.

Does the set conform to a recognised standard?
Yes — the countersinks are manufactured to DIN 355 dimensions, ensuring standardised 90° geometry and interchangeability with documented production procedures.

What size range does the set cover and what is the SKU?
The set covers 6.3–25.0 mm diameters and is listed under SKU 4000605561NW for stock and ordering purposes.

What shank type and cutting direction are specified?
The tools feature a cylindrical shank and right‑hand cutting flutes, providing secure clamping and conventional cutting rotation for standard drilling and countersinking equipment.

How is the set supplied for workshop use?
The ULTIMATECUT 4S countersink set is supplied in a plastic cassette for protected storage and clear organisation, packaged as a single unit.

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