150mm Countersink DIN 373 HSS 3-Flute 180° For Steel And Cast Iron - TECWERK

Take advantage of the HSS construction and 180° seating angle for consistently burr-free countersinks, plus the three cutting edges that ensure a smooth finish at low cutting speeds; order the countersink directly via Metav Werkzeuge or consult the Metav specialists for tailored application advice.

DIN 373 M4 Countersink (HSS) – 3-flute, 180° by TECWERK

DIN 373 M4 Countersink (HSS) is a precision countersink designed for creating clean seatings for cylinder head screws, hex screws and nuts across steel, cast iron and non-ferrous metals.

• HSS construction for durable cutting performance
• 180° countersink angle for flat seating
• Three cutting edges for burr-free finish
• Cylinder shank with fixed pilot pin for guided runs

Consistent, burr-free seatings for fasteners

The combination of high-speed steel (HSS) material and a 180° countersink angle delivers reliable flat seatings for a wide range of fasteners. The three cutting edges reduce vibration and produce a cleaner surface than two-flute designs, which translates into fewer deburring operations and improved assembly quality. This results in a measurable reduction in rework time when working on plain steel or cast components; the tool is especially effective at lower cutting speeds where heat generation is minimised and tool life is extended. The result is a professional seating with minimal burr formation and a superior contact surface for screws and nuts.

Robust geometry and guided accuracy for repeatable results

Equipped with a cylinder shank and a fixed pilot pin, the countersink ensures guided entry and stable rotation even in through-holes. The three-flute geometry balances cutting forces and improves chip evacuation, which is beneficial when machining non-ferrous and light alloys as well as common steels. The medium quality grade specified for through holes offers a solid compromise between cost and longevity, making the tool suitable for production runs and workshop tasks where dependable repeatability is required. The guided design also helps prevent rattling and chatter marks that can compromise the seating integrity.

Optimised cutting data and broad material compatibility

Technical specifications support practical use: the tool achieves best results at lower cutting speeds, and the recommended feed in steel up to 500 N is 0.16 mm/rev, a setting that balances finish and tool wear. The design is intended for use on steel, cast iron, non-ferrous metals and light alloys, yielding clean chamfers and minimal distortion. When machining mixed batches or sensitive components, the controlled geometry and HSS composition reduce the risk of workpiece damage. For users less familiar with countersinking parameters, the clearly defined feed and suitability notes simplify setup and shorten preparation times.

For burr-free, guided countersinking with TECWERK quality, contact Metav Werkzeuge for application guidance and reliable supply from Emmerich—call +49 2822 7131930 or email info@metav-werkzeuge.com

Technical Data

• Article number: 2000865339NW
• Product name: DIN 373 M4 Countersink (HSS)
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Material: HSS
• Countersink angle: 180°
• Number of cutting edges: 3
• Recommended feed in steel (≤500 N): 0.16 mm/rev

Special features

• DIN 373 standard
• Cylinder shank with fixed pilot pin
• For countersinking cylinder head screws, hex screws and nuts
• Ideal for burr- and chatter-free countersinking in steel and cast iron
• Suitable for non-ferrous and light metals
• Best results at low cutting speed
• Quality grade: medium (for through holes)

FAQ

What materials can be machined with this countersink?
The DIN 373 M4 countersink (HSS) is suitable for steel, cast iron, non-ferrous metals and light alloys, offering burr-free results across these materials when used at recommended speeds and feeds.

How does the three-flute design affect finish quality?
The three cutting edges on the TECWERK countersink reduce vibration and improve chip evacuation, which produces a smoother, burr-free finish compared with two-flute variants.

What is the recommended feed for steel machining?
For steel up to the specified load of 500 N, the suggested feed is 0.16 mm/rev, balancing surface finish and tool life as indicated in the technical guidance.

Can this countersink be used for through-holes only?
This tool is specified with a medium quality grade for through holes, making it particularly well suited to through-hole countersinking applications, while still performing reliably in general workshop tasks.

What features help with guided insertion and stable operation?
The cylinder shank combined with a fixed pilot pin ensures guided entry and stable rotation, reducing the risk of chatter and improving repeatability for assembly-critical seatings.

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