16.5mm Countersink DIN 335C 90° HSS Special Coated 3-Flute Right-Hand - MAPAL Dr. Kress SE & Co. KG

Take advantage of the combination of HSS special coating, EUC unequal-pitch geometry and a 90° conical design to reduce feed effort and improve surface finish; order the tool directly via Metav Werkzeuge or consult our specialists for application-specific advice.

Countersink EUC DIN 335 C Ø16.5 mm, 90° — HSS special, 3-flute, cylindrical shank (MAPAL)

The Countersink EUC DIN 335 C Ø16.5 mm, 90° is a precision countersink designed for clean chamfering and deburring in steel, cast iron and non-ferrous metals, combining optimised geometry and radial relief to lower cutting forces and improve process stability

• HSS special coating
• 90° conical geometry
• 3-flute EUC unequal pitch
• Axial force reduced by 50%

Faster machining with measurable force reduction

The combination of HSS with a special coating and the unequal-pitch cutter layout delivers a clear productivity advantage: the tool reduces axial force by around 50% and radial force by about 25%, which translates into lower drive load and fewer feed interruptions. This reduction in forces reduces the risk of chatter and enables a steadier cutting action, so chamfers and countersinks are produced with consistent geometry and less rework. The result is higher throughput and more predictable cycle times in production environments.

Reliable material versatility and recommended parameters

Optimised for use on steel, cast iron and non‑ferrous metals, the tool maintains cutting stability across common workshop materials. For reference, the specified feed for steel at a cutting force up to 500 N is 0.14 mm/rev, providing a practical starting point for process setup. The tool’s right‑hand cutting and robust HSS substrate ensure reliable performance in typical workshop setups; the feed guidance helps to balance surface finish with tool life for repeatable results.

Precision geometry for cleaner chamfers and longer life

Built to DIN 335 C and finished as a precision tool, the countersink combines radial relief and precision-ground cutting edges to facilitate smoother chip flow and easier chip evacuation. The three-flute design with unequal pitch (EUC) prevents harmonic overlap between flutes, reducing vibration and improving edge stability. The cylindrical shank ensures secure clamping in standard holders, enabling fast changeovers and consistent concentricity during operation.

Easy integration into production and maintenance benefits

The tool’s geometry and coating reduce cutting forces and tool vibration, which positively affects downstream processes: fewer burrs, reduced rework and less stress on fixtures. Operators benefit from simpler process tuning and less frequent intervention, while maintenance teams see longer intervals between tool changes thanks to improved wear resistance. When process optimisation is the priority, this countersink supports stable results without complex adjustments.

Discuss application details and availability with Metav Werkzeuge to ensure optimal tool selection and fast delivery from Emmerich.

Technical Data

• Article number: 4000806029NW
• SKU: 4000806029NW
• Manufacturer: MAPAL Dr. Kress SE & Co. KG

Facts

• Diameter: Ø 16.5 mm
• Countersink angle: 90°
• Number of flutes: 3
• Feed in steel (≤ 500 N): 0.14 mm/rev

Special features

• HSS special coating
• DIN 335 C standard
• EUC unequal pitch geometry
• Radial relief / precision ground
• Right‑hand cutting
• Cylindrical shank
• For steel, cast iron and non‑ferrous metals

FAQ

What materials is this countersink suitable for?
The countersink is specified for steel, cast iron and non‑ferrous metals; the design and coating support versatile workshop use.

How does the EUC unequal pitch benefit machining?
Unequal pitch (EUC) reduces harmonic vibrations between cutting edges, improving stability and lowering the tendency to chatter when using this countersink.

What cutting parameters are recommended for steel?
As a guideline, a feed of 0.14 mm/rev is indicated for steel with cutting forces up to 500 N; adjust speeds and feeds to machine rigidity and material grade.

Does the tool comply with industry standards?
Yes, the countersink conforms to DIN 335 C, providing standardised geometry and interchangeability in precision chamfering tasks.

How is the tool held in the machine?
The tool features a cylindrical shank for clamping in standard toolholders and collets, ensuring stable concentricity for the countersinking operation.

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