M8 Countersink HSS 3-Flute With Pilot Pin 180° For Countersinking Steel And Castings - TECWERK

Benefit from a combination of high-cutting precision, sturdy HSS construction and a fixed pilot pin that guarantees burr‑free, chatter‑reduced countersinks for a reliable assembly process — order the tool directly via Metav Werkzeuge or consult the technical team for tailor-made application advice.

TECWERK Countersink DIN 373 M8 – HSS, 180° Angle, 3‑flute

The TECWERK countersink DIN 373 M8 is a high‑speed steel countersinking tool designed to produce clean, burr‑free seats for fasteners in core holes across steel, cast iron and non‑ferrous materials.

High‑speed steel construction for durability and precision
180° countersink angle for flat seating of screw heads
Cylinder shank with fixed pilot pin for exact guidance
Three cutting edges for smooth, burr‑free finishing

Precision seating for secure assemblies

The countersink is made from HSS (high‑speed steel) and conforms to DIN 373, ensuring the geometry suits standard core holes and common fastener types. Its 180° countersink angle provides a flat, even bearing surface for cylinder head screws and hexagon fasteners, which reduces stress concentrations at the screw head. Produced seats are burr‑reduced and consistent, which lowers the need for secondary deburring operations and improves assembly repeatability. For workshops aiming to reduce rework, this results in measurable time savings and improved joint reliability.

Stable guidance and predictable cutting behaviour

Equipped with a cylinder shank and a fixed pilot pin, the tool centres precisely in pre‑drilled core holes, preventing wobble and minimising surface irregularities. The design includes three cutting edges, which distribute cutting forces evenly for a cleaner finish and less vibration compared with two‑flute variants. For steel applications the recommended feed is 0.2 mm/rev at moderate cutting speeds; the tool achieves its best results when operated at lower surface speeds, which reduces thermal load and preserves the cutting edge life. The pilot pin also helps to maintain concentricity during rapid production runs, supporting consistent part quality.

Versatile material compatibility and workshop advantages

This countersink is suitable for use in steel and cast iron, as well as non‑ferrous and light metals, giving machining shops a single tool for a broad range of common tasks. The robust HSS material balances wear resistance with ease of resharpening when necessary, offering long service life without complex tooling investment. By producing clean, flat countersinks that match standard fastener geometries, the tool reduces assembly variation and facilitates faster inspection cycles. Integration into existing tool holders is straightforward due to the standard shank form, making it a practical addition for both manual and CNC workstations.

Contact Metav Werkzeuge today to discuss application specifics and to secure the TECWERK HSS countersink for immediate integration into production; email info@metav-werkzeuge.com or call +49 2822 7131930 to arrange a technical consultation

Technical data

• Article number: 2000865349NW
• Designation: Countersink DIN 373 M8 for core hole, HSS, 3 flutes, TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Cutting edges: 3
• Countersink angle: 180°
• Feed in steel (up to 500 N): 0.2 mm/rev
• Standard: DIN 373

Special features

• HSS material
• Cylinder shank with fixed pilot pin
• Intended for cylinder head screws, hexagon screws and nuts
• Ideal for burr‑free and chatter‑free countersinking in steel and cast iron
• Suitable for non‑ferrous and light metals
• Best results at low cutting speed
• Grade suitable for core holes

FAQ

What materials can this countersink be used on?
The TECWERK countersink is suitable for steel and cast iron, as well as non‑ferrous and light metals, providing versatile use across common workshop applications.

Is the pilot pin removable and what does it do?
The fixed pilot pin ensures stable centring in a core hole to prevent wobble and improve finish; its fixed design offers consistent guidance for repeatable countersinking.

Which screw types does the tool support?
The tool is designed to create seats for cylinder head screws, hexagon screws and nuts, with a 180° angle for flat seating compatible with DIN‑standard fasteners.

What operating parameters deliver the best results?
For steel up to the indicated cutting resistance, a feed rate of 0.2 mm per revolution and a lower cutting speed are recommended to reduce heat and prolong tool life.

Can the tool be resharpened?
Made from HSS, the countersink permits resharpening under proper workshop procedures, which helps extend service life and maintain cutting quality.

Manufacturer/Responsible: NORDWEST Handel AG, Robert‑Schuman‑Straße 17, 44263 Dortmund