6.3mm Countersink EUC DIN 335C 90° HSS Special Coated 3-Flute Reduced Axial/Radial Force - MAPAL Dr. Kress SE & Co. KG

Take advantage of the combination of HSS construction, the EUC (extremely unequal division) geometry and a 90° countersink angle for faster, cleaner chamfering with significantly lower cutting forces; order the countersink directly via Metav Werkzeuge or consult our specialists for application advice.

MAPAL Countersink EUC DIN 335 C, 90° Ø 6.3 mm — HSS, 3‑flute

The MAPAL Countersink EUC DIN 335 C 90° Ø 6.3 mm is a precision conical countersink designed for high‑quality chamfering in a range of ferrous and non‑ferrous workshop materials.

• Precision 90° countersink geometry
• Specially coated HSS cutting tool
• Reduces axial force by 50%
• Suited to steel, cast iron, non‑ferrous metals

Accurate chamfers for repeatable assembly fit

This precision conical tool delivers consistently shaped chamfers thanks to its DIN 335 C specification and precision design. The tool is ideal where reliable seating for fasteners or clean edge breaks are essential; the geometry yields predictable results across production runs and reduces rework. The three cutting edges ensure a balanced cut, while the HSS substrate maintains toughness under intermittent and continuous operation, supporting stable hole chamfering even in everyday workshop use.

Engineered geometry to lower cutting forces and vibration

The specialised EUC arrangement, combined with prepared cutting edges and a radially relief‑ground profile, significantly lowers forces during countersinking. The design leads to a reduction in axial force of 50% and a reduction in radial force of 25%, which translates into lower feed effort, less chatter and improved surface finish. For machining setups with limited rigidity, these force reductions help maintain accuracy and extend tool life, making the process more efficient and less demanding on equipment.

Versatile performance across common materials with clear machining data

Manufactured for operation in steel, cast iron and non‑ferrous metals, the tool’s coating and geometry are matched to deliver clean results and predictable tool life. For steel under a cutting load up to 500 N the recommended feed is approximately 0.08 mm/rev, a practical guideline that balances throughput and finish quality. The right‑hand cutting action and three‑flute shank give stable engagement and smooth evacuation of chips, supporting both prototype work and series production. By choosing a countersink with defined standards and measurable parameters, workshop planners gain clearer process control and fewer variables to monitor.

Contact Metav Werkzeuge for tailored recommendations on MAPAL countersinks, ordering details and application support — phone +49 2822 7131930 or e‑mail info@metav-werkzeuge.com

Technical Data

• Article number: 4000806122NW
• Item designation: MAPAL countersink EUC DIN 335 C 90° Ø 6.3 mm
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1
• UID: 4000806122NW

Facts

• Diameter: 6.3 mm
• Countersink angle: 90°
• Cutting edges: 3
• Feed in steel up to 500 N: 0.08 mm/rev
• Axial force reduction: 50%
• Radial force reduction: 25%
• Standard: DIN 335 C

Special features

• HSS base material
• Special coating (specially coated)
• Extremely unequal division (EUC)
• Radially relief‑ground
• Prepared cutting edges
• Right‑hand cutting
• Precision execution
• Optimised countersinking geometry
• Suitable for steel, cast iron and non‑ferrous metals

FAQ

What materials can be machined with this countersink?
The MAPAL countersink is suitable for steel, cast iron and non‑ferrous metals, providing clean chamfers and reliable tool life across these common workshop materials.

What does EUC mean and why is it beneficial?
EUC stands for extremely unequal division; the MAPAL EUC geometry staggers the cutting edges to reduce vibration and improve chip flow, resulting in lower forces and better surface finish compared with uniform‑pitch tools.

What feed should be used for steel?
For steel under cutting loads up to 500 N the guideline is 0.08 mm/rev, which balances efficient material removal with a consistent finish when using this MAPAL countersink.

Is the tool suitable for production environments with limited rigidity?
Yes. The combination of radially relief‑ground flanks and EUC geometry in this countersink reduces axial and radial forces, making it well suited to setups with moderate rigidity while preserving accuracy.

Which standard does the countersink conform to and what is the SKU?
The tool conforms to DIN 335 C and is listed under SKU/Article number 4000806122NW, produced by MAPAL Dr. Kress SE & Co. KG.

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