31mm Countersink 90° HSS Special Coated 3-Flute EUC, Precision Ground - MAPAL Dr. Kress SE & Co. KG

Take advantage of the HSS construction with special coating, the EUC optimised geometry and the measurable reduction of axial and radial forces for more stable countersinking and longer tool life; order the countersink directly via Metav Werkzeuge or consult the specialists for application advice.

MAPAL Countersink EUC DIN 335 C — 90° Ø31 mm, HSS special

A MAPAL countersink EUC DIN 335 C designed for precision countersinking in steel, cast iron and non-ferrous metals with a cylindrical shank and three cutting edges.

• HSS with special coating
• 90° precision geometry, Ø31 mm
• Reduces axial force by 50%

Greater process stability through optimised geometry

The combination of HSS material and a special coating delivers robust cutting performance under continuous use. The tool’s EUC (extremely unequal division) geometry and radially relieved flanks reduce vibration and improve chip flow, which in turn lowers tool wear. The result is a noticeable increase in process stability during countersinking operations, especially where repeatable hole quality is required. The 90° angle conforms to standard countersinking profiles and supports consistent chamfer geometry across batches.

Less feed force and reduced chatter for cleaner results

By cutting with three cutting edges and a preparatory edge treatment, axial force is reduced by around 50% and radial force by approximately 25%, lowering the required feed effort and the tendency to chatter. Measurable parameters are provided for practical planning: feed in steel up to 500 N: 0.22 mm/rev. For workshop planners and CNC programmers, these figures translate into gentler machine loading, fewer rejects and reduced secondary finishing. The right-hand cutting action and precision finish make it suitable for both manual and automated setups.

Compatibility and workshop integration for efficient use

Standard conformity with DIN 335 C and a cylindrical shank ensure straightforward integration into common toolholders and countersinking fixtures. The countersink’s precision execution—radial undercut and sharpened edges—supports reliable centring and a uniform chamfer even on mixed material runs that include steel, cast iron and aluminium alloys. Fewer tool changes are needed thanks to extended life from the coating and geometry, which helps to maintain uptime and reduce downtime for regrinding or replacement.

For precise MAPAL countersinking solutions and procurement, contact Metav Werkzeuge in Emmerich for tailored advice and ordering at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: 4000806045NW
• UID: 4000806045NW
• Packaging unit: 1
• Manufacturer: MAPAL Dr. Kress SE & Co. KG

Facts

• Diameter: 31 mm
• Countersink angle: 90°
• Cutting edges: 3
• Feed in steel up to 500 N: 0.22 mm/rev

Special features

• HSS material
• Special coating
• DIN 335 C standard
• EUC (extremely unequal division) geometry
• Right-hand cutting
• Radially relieved (radial undercut)
• Precision execution, prepared cutting edges
• Suitable for steel, cast iron and non-ferrous metals
• Cylindrical shank

FAQ

What is the primary advantage of the EUC geometry?
The EUC geometry in this MAPAL countersink reduces vibration and improves chip evacuation, resulting in more stable cutting and longer tool life.

Can this countersink be used on both steel and aluminium?
Yes, the tool is specified for steel, cast iron and non-ferrous metals, making it suitable for mixed-material production runs.

What feed rate should be used as a guideline in steel?
As a guideline, a feed in steel up to 500 N corresponds to approximately 0.22 mm per revolution with this countersink.

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