6.3-25mm Countersink Set DIN 335C 90° HSS Special 3-Flute Shank With 3 Flats, Plastic Case - MAPAL Dr. Kress SE & Co. KG

Reliable production through HSS cutting edges, EUC geometry and a secure three‑flat shank reduces axial and radial forces for smoother machining — order the set via Metav Werkzeuge or consult our specialists for application advice.

Countersink set DIN 335 C (90°) — HSS special, EUC 6.3–25 mm (MAPAL)

The Countersink set DIN 335 C (90°) is a precision countersinking range designed for clean deburring and chamfering in industrial metalworking, suitable for workshop and production use.

• HSS special coating for long life
• EUC unequal pitch reduces vibration
• Cuts steel, cast iron and non‑ferrous metals
• Three‑flat shank for secure clamping

Increased throughput through optimised cutting physics

The set is engineered to raise process efficiency by reducing cutting forces: axial force is cut by about 50%, lowering feed effort, while radial force falls by roughly 25%, decreasing the tendency to chatter. Built in HSS with a special coating, the cutters retain cutting sharpness under continuous use and the EUC (extremely unequal cut pitch) prevents harmonic resonance, ensuring more consistent hole geometry and fewer rejected parts. This combination of geometry and material translates directly into shorter cycle times and less rework.

Secure clamping and smooth chip evacuation for reliable operation

A three‑flat shank provides positive seating in chucks and collets, improving concentricity and minimising slippage during drilling and countersinking cycles. The 3‑flute design produces a balanced cut with reliable chip formation, and the radial relief on the cutting edges reduces friction and heat build‑up. The cutters are right‑hand cutting and intended for use on steel, cast iron and non‑ferrous metals, offering versatility for common workshop materials while preserving tool life and machine spindle loading.

Consistent countersinks with standardised geometry

Manufactured to DIN 335 C with a 90° countersink angle, this set delivers repeatable chamfers and deburrs that meet assembly and fastener preparation standards. The tools are precision ground, with prepared cutting edges and an optimised flute geometry that improves finish quality and reduces burr sizes. The extreme unequal pitch helps to avoid synchronous vibration, so the final chamfer is uniform and ready for inspection or immediate assembly, reducing downstream finishing steps.

Practical packaging and readiness for industrial workflows

Supplied in a compact plastic box for organised storage and easy transport, the set is ready for integration into tool dispensers or job kit assemblies. The robust construction and precision execution make the set suitable for high‑repeatability environments such as production cells or maintenance workshops. For specific fixturing or machine interface questions, technical details and machining parameters are available to ensure compatibility with existing tooling systems and to help plan process changes with minimal downtime.

For precision countersinking in industrial workflows, contact Metav Werkzeuge to discuss the MAPAL countersink set and suitability for specific applications — email info@metav-werkzeuge.com or call +49 2822 7131930 for fast advice and reliable supply from Emmerich.

Technical data

• Article number: 4000806130NW
• Manufacturer SKU / UID: 4000806130NW
• Manufacturer: MAPAL Dr. Kress SE & Co. KG
• Packaging unit: 1
• Packaging: plastic box

Facts

• Standard: DIN 335 C
• Countersink angle: 90°
• Size range: 6.3–25 mm
• Number of flutes: 3
• Shank: 3 flats
• Cutting direction: right‑hand cutting

Special features

• Material: HSS
• Coating: special coating
• Precision ground
• Radial relief on cutting edges
• EUC — extreme unequal pitch
• Prepared cutting edges
• Application: steel, cast iron, non‑ferrous metals
• Performance: axial force reduction ~50%, radial force reduction ~25%

FAQ

Which materials is the set suitable for?
The MAPAL countersink set is specified for machining steel, cast iron and non‑ferrous metals, offering a versatile solution for common workshop materials.

How does the EUC geometry affect machining?
The EUC (extremely unequal cut pitch) interrupts regular harmonic frequencies, reducing vibration and improving surface finish and hole consistency when using the MAPAL countersinks.

What is the advantage of the three‑flat shank?
The three‑flat shank ensures secure clamping and better concentricity in standard chucks and collets, which reduces run‑out and improves repeatability for the MAPAL tool set.

Are the countersinks compatible with standard DIN specifications?
Yes, the set conforms to DIN 335 C with a 90° countersink angle, delivering standardised chamfers suitable for most fastening and deburring requirements.

How are the tools supplied and stored?
The MAPAL countersink set is supplied in a durable plastic box for organised storage and ease of handling on the shop floor.

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