150mm Countersink DIN 373 HSS 3-Flute With Pilot Pin 180° Angle Medium Grade - TECWERK

Efficient, burr-free countersinking is delivered by the combination of HSS construction, a 180° seating angle and a 3‑flute geometry, yielding consistent results for through-holes in steel and cast iron; order the tool via Metav Werkzeuge or request advice from our consultants for machining parameters.

Countersink DIN 373 M3, HSS — 180° 3‑flute (TECWERK)

A DIN 373 M3 countersink designed for burr-free seating of cylinder head screws, hex screws and nuts across steel, cast iron and light non‑ferrous alloys

• HSS construction for tool longevity
• 180° angle for flat seating
• Three cutting edges for smooth finish
• Cylinder shank with fixed pilot

High-efficiency countersinking for production use

The tool combines a high-speed steel (HSS) body with a standardised DIN 373 form to deliver reproducible seating geometry. The 3‑flute design reduces vibration and spreads cutting forces, which improves surface finish and lowers the risk of chatter; this directly increases throughput and reduces rework in batch production. The geometry is optimised for burr-free results, so less manual deburring is required and assembly time is reduced. For components machined in mixed batches, the consistent seating produced by this tool supports repeatable torque behaviour in assembled fastenings.

Material compatibility and recommended cutting parameters

Engineered for reliable performance in a range of substrates, the countersink shows best results in steel and cast iron, while also performing well in light non‑ferrous metals. The tool is specified with a feed of 0.14 mm per rev in steel up to 500 N, and achieves optimal life at lower cutting speeds — a consideration when selecting spindle speed for larger diameters or harder materials. The medium tolerance class for through‑holes ensures adequate clearance where required, while the fixed pilot provides positive location for accurate seat placement even in pre‑drilled holes.

Practical design features that save time at the machine

The combination of a cylinder shank with fixed pilot and the 180° countersink angle simplifies setup and reduces cycle variability: the pilot centres reliably in through‑holes, and the flat seat created by the angle is suitable for cylinder head and hexagonal screw heads. The three cutting edges distribute wear evenly, extending service life and maintaining finish quality over longer runs. For workshop environments seeking dependable everyday tools, this geometry balances robustness with straightforward handling and predictable results.

For precision, longevity and consistent seating choose the TECWERK DIN 373 M3 countersink — contact Metav Werkzeuge in Emmerich for tailored machining advice and to arrange supply via info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 2000865338NW
• Label: Flachsenker DIN 373 M3 Güte mittel f.DL HSS Z.3 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Standard: DIN 373
• Countersink angle: 180°
• Number of cutting edges: 3
• Feed in steel up to 500 N: 0.14 mm per rev
• Size designation: M3
• Grade: medium for through‑hole

Special features

• Material: high-speed steel (HSS)
• Shank type: cylinder shank with fixed pilot
• Application: countersinking for cylinder head screws, hex screws and nuts
• Suitable materials: steel, cast iron, non‑ferrous and light metals
• Best performance at lower cutting speeds for extended tool life

FAQ

Which materials is the countersink suited to?
The TECWERK DIN 373 M3 countersink is suitable for steel, cast iron and light non‑ferrous metals; this versatility supports mixed‑material production runs (SKU 2000865338NW).

What seating angle and finish does the tool produce?
The tool produces a 180° flat seat suitable for cylinder head screws, hex screws and nuts, and the 3‑flute geometry promotes a smooth, burr‑reduced finish.

What feed and speed recommendations apply?
For steel up to 500 N, follow the specified feed of 0.14 mm per rev and favour lower cutting speeds to maximise tool life and surface quality.

Is the countersink suitable for through‑holes?
Yes; the tool is specified at a medium grade for through‑holes and includes a fixed pilot for positive location and repeatable seating.

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