4.3mm Countersink EUC DIN 335C 90° HSS Special Coating 3-Flute Axial Force Reduced - MAPAL Dr. Kress SE & Co. KG

Take advantage of the combination of optimised EUC geometry, HSS with special coating and reduced feed forces for smoother countersinking and fewer rejects; order the countersink directly via Metav Werkzeuge or consult our advisors for application support.

Countersink EUC DIN 335 C 90° Ø4.3 mm — HSS, 3‑flute (MAPAL)

A Countersink EUC DIN 335 C 90° Ø4.3 mm designed for precision chamfering and deburring across steel, cast components and non‑ferrous metals

• HSS, special coating, DIN 335 C standard
• 90° countersink angle, precision 3‑flute geometry
• EUC unequal pitch reduces vibration and chatter
• Cuts steel, cast and non‑ferrous metals efficiently

Reduce feed effort with unequal‑pitch EUC geometry

The EUC geometry combines an extremely unequal pitch with optimised flank form and prepared cutting edges to reduce cutting forces. This design achieves a 50% axial force reduction and a 25% radial force reduction, which translates into noticeably lower feed power requirements and reduced tendency to chatter. For machine shops this means less tool strain during high‑precision countersinking and a higher first‑pass yield when producing chamfers for subsequent assembly.

Durable HSS body with a specialist coating for longer tool life

Manufactured from HSS and finished with a special coating, the tool balances toughness and wear resistance for prolonged service in mixed production environments. The coating improves performance when machining harder substrates while the high‑speed steel core helps absorb intermittent loads. For reference, the geometry allows a recommended feed in steel up to 500 N of 0.06 mm/rev, offering a practical starting point for process setup and ensuring consistent surface quality without aggressive cutting parameters.

Consistent seating and assembly thanks to DIN 335 C precision

Engineered to DIN 335 C tolerances with a true 90° countersink angle, the tool provides uniform chamfers for reliable screw and fastener seating. The 3‑flute layout and radially relieved flanks support clean chip evacuation and smooth cutting action, so countersinks present a repeatable seat profile part after part. This precision is particularly valuable where torque‑controlled fastening or tight positional tolerances are critical to final product performance.

Practical advantages for workshop efficiency and fewer reworks

A cylindrical shank format fits standard toolholders and simplifies tool changes, while the right‑hand cutting direction aligns with common rotational setups. The optimized cutting geometry and prepared edges reduce the need for secondary finishing, lowering cycle times and helping workshops maintain throughput. Where deburring quality and repeatability matter, this countersink offers an effective balance of precision, durability and reduced machining effort.

For precision countersinking from MAPAL, contact Metav Werkzeuge for tailored advice or to place an order; Metav’s application experts can confirm suitability for specific materials and setups via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 4000806032NW
• Label: Kegelsenker EUC DIN 335 C 90° Ø4.3 mm HSS special cylindrical shank 3‑flute
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1

Data

• Diameter: 4.3 mm
• Countersink angle: 90°
• Cutting edges: 3 flutes
• Recommended feed in steel: 0.06 mm/rev at up to 500 N
• Axial force reduction: 50%
• Radial force reduction: 25%

Special features

• Material: HSS
• Coating: special coating
• Standard: DIN 335 C
• Cutting direction: right‑hand
• Geometry: EUC unequal pitch, optimised cutting geometry
• Shank type: cylindrical shank
• Radial relief: radially relieved
• Applications: steel, cast and non‑ferrous metals

FAQ

What materials can this countersink process reliably?
The Countersink EUC DIN 335 C 90° Ø4.3 mm from MAPAL is specified for steel, cast and non‑ferrous metals, making it suitable for mixed‑material production runs where consistent chamfer quality is required.

How does the EUC geometry improve machining performance?
By using the EUC unequal pitch and prepared cutting edges, the MAPAL countersink reduces axial force by 50% and radial force by 25%, which lowers vibration and chatter and improves surface finish consistency.

What feed and force parameters are recommended for steel?
For steel applications the tool guidelines state a feed of 0.06 mm/rev at cutting forces up to 500 N, providing a reliable baseline for process setup with the MAPAL countersink (SKU 4000806032NW).

Is the tool suitable for standard toolholders?
Yes; the cylindrical shank design of the MAPAL countersink is compatible with common collet and chuck systems and supports straightforward tool changes on general workshop equipment.

How does the special coating affect tool life?
The specialist coating enhances wear resistance and thermal stability on the HSS core, extending service life and maintaining cutting edge integrity during repetitive countersinking in demanding materials.

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