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

Benefit from precision machining with significantly reduced axial and radial forces, a special HSS coating and optimised cutting geometry for consistent, burr‑free results. Combine lower feed effort with improved stability to maintain production flow and tool life. Order the countersink directly via Metav Werkzeuge or contact the consultants for tailored application advice.

Countersink EUC DIN 335 C 90° D 6.3 mm HSS — 3‑flute precision countersink by MAPAL

A countersink EUC DIN 335 C 90° D 6.3 mm HSS designed for precision deburring and chamfering in machining operations on steel, cast iron and non‑ferrous metals.

• HSS with special coating according to DIN 335 C
• Three‑flute precision geometry, EUC unequal spacing
• Reduces axial force by up to 50% during countersinking
• Suitable for steel, cast iron and non‑ferrous metals

Stable, repeatable countersinks through optimised geometry

The tool combines DIN 335 C compliance with a three‑flute design and an EUC geometry that balances cutting loads. This results in a 90° countersink that delivers uniform chamfers and reduces tool walk. The geometry and prepared cutting edges make the cutter particularly suited to series production where repeatability is critical, while the HSS substrate with a special coating extends tool life and maintains edge integrity under continuous use.

High material versatility with predictable performance

Engineered for use on steel, cast iron and non‑ferrous metals, the cutter achieves clean edges and minimal burr formation. The tool’s radial relief and honed cutting edges lower the tendency to chatter, offering smoother surface finishes and less rework. For shops that process mixed materials, the consistent performance across substrates reduces setup time and simplifies tool selection.

Reduced forces for easier feed and improved stability

Thanks to the EUC spacing and refined cutting geometry, axial force is reduced by approximately 50% and radial force by about 25%, which lowers required feed effort and diminishes vibration. The practical benefit is more stable machining, especially on handheld or less rigid setups, and a reduction in rejected parts due to irregular countersinks. The design supports efficient chip evacuation and a controllable cutting action.

Shank design, operational guidance and achievable feeds

The countersink is supplied with a cylindrical shank for standard toolholding and is rated for recommended operation at a feed of 0.08 mm/rev in steel under a cutting force of up to 500 N. The tool’s right‑hand cutting and precision finish permit predictable performance in automated and manual countersinking tasks. For non‑specialist users, the listed feed figure provides a reliable starting point for process setup; adjustments should be made according to machine rigidity and workpiece clamping.

Request specific availability and delivery from Metav Werkzeuge in Emmerich for fast dispatch and application guidance tailored to MAPAL cutting tools

Technical Data

• Article number: 4000806027NW
• Label: Kegelsenker EUC DIN 335C 90Grad D.6,3mm HSS spezial Zyl.schaft Z.3 BECK
• Manufacturer: MAPAL Dr. Kress SE & Co. KG

Facts

• Diameter: 6.3 mm
• Countersink angle: 90°
• Number of flutes: 3
• Recommended feed in steel (≤ 500 N): 0.08 mm/rev
• Right‑hand cutting

Special features

• Material: HSS
• Coating: special coating
• Compliance: DIN 335 C
• Geometry: EUC (extremely unequal spacing), radial relief, honed cutting edges
• Application: steel, cast iron, non‑ferrous metals
• Benefit: axial force approx. −50%, radial force approx. −25%

FAQ

Which materials can this countersink machine?
The MAPAL countersink (SKU 4000806027NW) is specified for steel, cast iron and non‑ferrous metals, providing clean chamfers and reduced burr formation across these substrates.

What feed should be used as a starting point?
A recommended starting feed is 0.08 mm/rev in steel under cutting forces up to 500 N; the MAPAL countersink’s geometry supports stable cutting at this setting.

How does the EUC geometry improve results?
The EUC geometry features extremely unequal flute spacing and prepared cutting edges, which reduces vibration and lowers both axial and radial forces for smoother, more consistent countersinks.

Is the shank compatible with standard toolholders?
Yes, the cutter is supplied with a cylindrical shank suitable for standard collet and chuck systems commonly used in metalworking.

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