25mm Countersink 90° HSS Special Coated, 3-Flute EUC Design - MAPAL Dr. Kress SE & Co. KG

Take advantage of HSS performance and the optimised EUC geometry to lower cutting forces and improve chamfer quality; order directly via Metav Werkzeuge or consult our technical team for application-specific guidance.

EUC countersink DIN 335 C – 90° Ø25 mm, HSS, three‑flute (MAPAL)

The EUC countersink DIN 335 C is a precision 90° countersink for high-performance chamfering and deburring in metalworking, engineered for steel, cast iron and non‑ferrous metals.

• HSS with specialised coating
• 90° precision countersink geometry
• Three‑flute design for smooth cutting
• Reduces axial force by up to 50%

Higher efficiency through targeted geometry and coating

The EUC design combines a DIN 335 C standard form with a specialised coating on HSS, delivering consistent cutting behaviour and extended tool life. The three‑flute configuration was developed to balance cutting engagement and chip evacuation, which reduces required feed effort. Thanks to the tool's optimised geometry and prepared cutting edges, a measurable decrease in axial and radial loads is achieved; this results in smoother feed requirements and fewer interruptions in series production.

Consistent results across common workshop materials

Designed for machining of steel, cast iron and non‑ferrous metals, the tool maintains stable performance at typical workshop feeds. The datasheet specifies a feed in steel (up to 500 N) of 0.18 mm/rev, a practical guideline for achieving clean chamfers without overload. By translating cutting parameters into predictable outcomes, the countersink supports reliable cycle planning and reduced rework, making it suitable for production runs and precision repair tasks alike.

Reduced vibration and improved surface finish for efficient cycles

The extremely unequal pitch of the EUC layout diminishes synchronous excitation, while precision manufacturing—including radial grinding—minimises chatter and improves hole-edge finish. Right‑hand cutting and a cylindrical shank enable straightforward mounting in standard collets or holders, so setup time is reduced and process stability is increased. The combined effect is better surface quality with longer intervals between tool changes, which supports a steady shop-floor throughput.

For precision countersinking with reduced cutting forces, contact Metav Werkzeuge for tailored technical advice on MAPAL's EUC countersink (SKU 4000806031NW) or request an application consultation at info@metav-werkzeuge.com / +49 2822 7131930.

Technical data

• Article number: 4000806031NW
• Designation: EUC countersink DIN 335 C, 90° Ø25 mm
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1

Facts

• Diameter: Ø25 mm
• Countersink angle: 90°
• Flutes: 3
• Shank: cylindrical
• Feed in steel (up to 500 N): 0.18 mm/rev

Special features

• Material: HSS
• Special coating
• DIN 335 C standard
• Right‑hand cutting
• Radially ground in precision execution
• EUC extremely unequal pitch
• Reduced axial force (~50%)
• Reduced radial force (~25%)
• Suitable for steel, cast iron and non‑ferrous metals

FAQ

What materials is this countersink suitable for?
The EUC countersink is specified for machining steel, cast iron and non‑ferrous metals and is designed to provide consistent chamfering results across these material groups.

How does the EUC design affect vibration and finish?
The extremely unequal pitch (EUC) reduces harmonic excitation and, combined with radial grinding, lowers chatter and improves edge finish during countersinking.

What cutting parameters are recommended for steel?
A reference feed for steel up to 500 N is 0.18 mm/rev; this value serves as a starting point for process setup with the MAPAL countersink (SKU 4000806031NW).

Why is the specialised coating important?
The special coating on the HSS substrate enhances wear resistance and helps maintain cutting-edge integrity, extending service life under regular production conditions.

Can the tool be mounted in standard holders?
The cylindrical shank permits mounting in common collets and tool holders, enabling straightforward integration into existing tooling systems.

Manufacturer/Responsible: MAPAL Dr. Kress SE & Co. KG, Ob. Bahnstrasse 13, 73431 Aalen