10.4mm Countersink EUC DIN 335C 90° HSS Special Coated 3-Flute Right-Hand - MAPAL Dr. Kress SE & Co. KG

Take advantage of the combination of HSS special coating, a 90° DIN 335 C geometry and the EUC unequal pitch to cut feed forces and improve process stability; order the countersink directly via Metav Werkzeuge or ask our consultants for application support.

MAPAL Countersink EUC DIN 335 C 90° Ø10.4 mm HSS special, 3‑flute

The MAPAL Countersink EUC DIN 335 C 90° Ø10.4 mm HSS special is a precision 3‑flute countersink designed for efficient countersinking and chamfering in general machining of steel, cast iron and non‑ferrous metals.

• HSS special coating for extended tool life
• Precision DIN 335 C 90° countersink
• Three cutting edges with EUC unequal pitch
• Reduces axial force by 50% and radial by 25%

Faster, more consistent countersinking through optimised geometry

The tool’s optimised geometry and extremely unequal division (EUC) result in significantly smoother cutting. With the updated geometry and prepared cutting edges, the countersink reduces axial force by up to 50% and radial force by roughly 25%, which directly lowers feed effort and diminishes the tendency to chatter. Conforming to DIN 335 C and delivered in a precision execution, the design is intended to stabilise the process and enable repeatable results when integrating the tool into production sequences.

Broad material capability and controlled feed for reliable results

Manufactured from HSS with a special coating, the cutter is suitable for machining steel, cast iron and non‑ferrous metals, delivering clean chamfers and burr‑reduced edges. The three‑flute design and three cutting edges distribute cutting load evenly, permitting a recommended feed of 0..1 mm/rev in steel up to 500 N, which balances material removal with surface finish. Where process reliability matters, the combination of material choice and flute geometry reduces rework and shortens cycle time by enabling a predictable cutting behaviour.

Precision finishing and improved process stability for workshop and production

A radial relief achieved by targeted grinding provides refined cutting engagement and contributes to reduced chatter during countersinking operations. The tool’s right‑hand cutting orientation and precision finish are intended to fit seamlessly into existing tool holders and machining routines, minimising set‑up time and supporting consistent chamfer geometry across batches. The special coating adds wear resistance and heat management, extending tool life and maintaining edge integrity under industrial workloads.

For procurement or technical advice on the MAPAL HSS EUC countersink, contact Metav Werkzeuge for tailored application guidance and assured supply from our Emmerich hub.

Technical data

• Article number: 4000806124NW
• Original label: Kegelsenker EUC DIN 335C 90Grad D.10,4mm HSS spezial 3‑Fl.schaft Z.3 BECK
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1

Facts

• Diameter: 10.4 mm
• Countersink angle: 90°
• Number of cutting edges: 3
• Standard: DIN 335 C
• Recommended feed in steel (≤ 500 N): 0.1 mm/rev

Special features

• Material: HSS
• Coating: special coating
• EUC = extremely unequal pitch for smoother cutting
• Right‑hand cutting
• Precision execution with prepared cutting edges
• Radial relief / radial honed
• Suitable for steel, cast iron and non‑ferrous metals
• Reduced axial and radial forces for improved stability

FAQ

What makes the EUC design different from a conventional countersink?
The EUC design uses an extremely unequal pitch between cutting edges; this reduces synchronous impacts and, in the delivered MAPAL countersink, lowers axial force and radial force for smoother, more stable cutting.

Is the countersink suitable for stainless steel?
The tool is specified for steel, cast iron and non‑ferrous metals; stainless steel is a specific alloy class and performance will depend on grade and hardness—testing or consultation is recommended for a final recommendation.

How does the special coating affect tool life?
The special coating improves wear resistance and thermal behaviour, which extends tool life and preserves edge geometry under continuous operation.

Can the countersink be used at higher feeds for rough work?
The recommended reference feed in steel up to 500 N is 0.1 mm/rev; deviations for roughing should be validated in process trials as higher feeds influence surface finish and life expectancy.

Which standard and dimensions does the product follow?
The countersink adheres to DIN 335 C, with a nominal angle of 90° and a diameter of 10.4 mm; the SKU is 4000806124NW for ordering and identification.

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