20.5mm Countersink 90° Three-Point HSS Special Coated 3 Flute Recessed Radial Grind, Precision - MAPAL Dr. Kress SE & Co. KG

Take advantage of optimised EUC geometry and HSS special coating to reduce cutting forces and improve surface finish, while the precision-ground three-flute design ensures reliable results in steel, cast iron and non‑ferrous metals; order via Metav Werkzeuge or contact our consultants for tailored advice.

EUC countersink DIN 335 C – 90° Ø20.5 mm, HSS, 3‑flute, cylindrical shank

A high-performance 90° countersink designed for precision deburring and chamfering in steel, cast and non‑ferrous metals, fitted with a cylindrical shank for secure seating in toolholders.

• HSS with specialised coating
• DIN 335 C standard, 90° cutting angle
• Three‑flute, precision‑ground geometry
• Axial force reduced by 50%
• Radial force reduced by 25%

Greater process efficiency through optimised cutting geometry

The EUC countersink benefits from an EUC geometry (extremely unequal division) and precision-ground cutting edges that lower cutting resistance and improve chip evacuation. The combination of HSS material and a specialised coating supports sustained cutting performance, especially in demanding shop-floor conditions. As a result, the tool offers a measurable increase in efficiency: less power is required at the spindle and feed motion, while tool life is extended because of reduced wear on the cutting lips.

Reduced forces for smoother machining and better finish

Thanks to the tool’s adapted geometry, axial force is reduced by approximately 50%, and radial force by about 25%. These reductions mean lower feed effort, fewer vibrations and a notable decrease in chatter tendency, which translates directly into a superior surface finish and more reliable chamfer tolerance. The specification also includes a recommended feed of 0.18 mm/rev in steel up to 500 N, providing a practical guideline for consistent operation across typical production tasks.

Robust construction and versatile material compatibility

The cutter is manufactured from high‑speed steel with a specialised coating and meets DIN 335 C, making it suitable for countersinking and chamfering in steel, cast iron and non‑ferrous metals. Its three‑flute layout and cylindrical shank ensure stable clamping and even load distribution, improving concentricity in handheld and machine tool set-ups alike. For shops seeking a single, reliable countersink to standardise routines, this tool balances precision, longevity and ease of use without demanding complex parameter adjustments.

For ordering or a technical consultation about suitability in a specific application, contact Metav Werkzeuge—our advisors can confirm compatibility and delivery options to your workshop.

Technical data

• Article number: 4000806030NW
• Label: Kegelsenker EUC DIN 335C 90Grad D.20,5mm HSS spezial Zyl.schaft Z.3 BECK
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1
• UID: 4000806030NW

Facts

• Diameter: Ø 20.5 mm
• Countersink angle: 90°
• Number of flutes: 3
• Recommended feed in steel (up to 500 N): 0.18 mm/rev
• Standard: DIN 335 C

Special features

• Material: HSS (high‑speed steel)
• Coating: special coating (spezialbeschichtet)
• Right‑hand cutting (rechtsschneidend)
• Precision execution, radial relief (radial hinterschliffen)
• EUC – extremely unequal division for optimised cutting forces
• Suitable for steel, cast iron and non‑ferrous metals

FAQ

What improvement in cutting force can be expected with this countersink?
The EUC countersink is engineered to reduce axial force by around 50% and radial force by approximately 25%, leading to smoother cutting and less vibration during countersinking tasks.

Which materials is this countersink suitable for?
This HSS countersink is suitable for steel, cast iron and non‑ferrous metals, making it a versatile choice for general workshop and production use.

What mounting does the tool require?
The tool has a cylindrical shank, suitable for standard collets and chucks; ensure correct clamping length for concentricity and stability.

Is there a recommended feed for use in steel?
Yes. A guideline of 0.18 mm/rev in steel up to a cutting force of 500 N is provided for reproducible results and to balance tool life with productivity.

How does the EUC geometry affect chip control?
The extremely unequal division reduces harmonic excitation and improves chip separation, which helps to avoid clogging and supports a consistent surface finish.

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