25mm 120° Countersink HSS 3-Flute Cylindrical Shank, Form C, Right-Hand Cutting - TECWERK

Take advantage of the combination of robust material, precise geometry and smooth, chatter-reduced operation for consistent finishing results; order directly via Metav Werkzeuge or consult the technical team for batch requirements.

TECWERK Cone Countersink 120° D25mm HSS – 3-flute, 10 mm shank

The TECWERK cone countersink 120° D25mm HSS is a high-performance finishing tool designed for burr-free countersinking and deburring across steels, cast materials and non-ferrous alloys.

• High-speed steel, 3-flute geometry
• 120° chamfer for precise countersinking
• 10 mm cylindrical shank for secure clamping

Consistent, burr-free chamfers for production use

The tool delivers burr-free and chatter-reduced finishes thanks to its optimised 3-flute geometry and sharp cutting edges, which reduce radial forces during entry. In batch and single-part production this reduces rework and increases part acceptability. The combination of cutting geometry and material hardness ensures reliable performance when creating clean chamfers or preparing holes for countersunk fasteners.

Durable high-speed steel and proven Form C geometry

Constructed from HSS, the countersink balances toughness and edge retention for interrupted and continuous cuts. The Form C profile provides a stable cutting form that maintains its geometry under moderate loads, extending tool life where low to medium cutting speeds are applied. This material and form pairing is especially suitable where hardness and a resilient cutting edge are required.

Application guidance and machining parameters for predictable results

Designed for a 120° chamfer with a nominal 25 mm head and 10 mm shank, the tool performs best at low cutting speeds; recommended feed in steel up to 500 N is 0.2 mm/rev. The tool is right-hand cutting and intended for use with secure clamping on standard drill chucks or collets. Following these parameters helps to avoid workpiece marking and ensures repeatable surface quality across different batches.

Suitable materials and industrial use cases

The countersink is optimised for steel, cast iron, non-ferrous metals and light alloys, making it suitable for mechanical workshops, maintenance departments and small-series manufacturing. The cylindrical shank allows straightforward integration into existing toolholders; the robust HSS composition supports occasional interrupted cuts common when deburring castings or drilled components.

Choose TECWERK quality for burr-free finishing and secure clamping; contact Metav Werkzeuge for ordering or technical advice at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: 2000865144NW
• Label: Kegelsenker 120Grad D.25mm HSS Z.3 Schaft-D.10mm TECWERK
• Manufacturer: TECWERK

Dimensions & performance

• Diameter: 25 mm
• Shank diameter: 10 mm
• Countersink angle: 120°
• Cutting edges: 3
• Feed in steel up to 500 N: 0.2 mm/rev
• Packaging unit: 1

Special features

• Material: HSS
• Form: C
• Right-hand cutting
• Cylindrical shank
• Ideal for burr-free and chatter-free countersinking, deburring and sinking
• Recommended for steel, cast iron, non-ferrous and light metals
• Best results at low cutting speed

FAQ

What clamping options are suitable for this countersink?
The TECWERK cone countersink can be clamped in standard drill chucks and collets that accept a 10 mm cylindrical shank for secure holding during countersinking.

Is the tool suitable for stainless or hardened steels?
The countersink, made of HSS and specified for low cutting speeds, is primarily intended for steels, cast iron and non-ferrous metals; machining of hardenable or highly alloyed stainless grades should be assessed case by case.

Which applications benefit most from this geometry?
Flat countersinks, deburring of drilled edges and preparation of holes for countersunk screws benefit from the 120° geometry and 3-flute design to achieve smooth chamfers with minimal burring.

How does the feed recommendation affect surface finish?
Adhering to the specified feed of 0.2 mm/rev in steel up to 500 N helps to maintain a stable cutting engagement and contributes to the burr-free finish and longer edge life of the countersink.

Is there guidance for spotting or pilot drilling before countersinking?
Pilot drilling to the nominal hole diameter with an appropriate drill reduces run-out and improves the finish when using this countersink; a secure setup and correct feed assist in avoiding chatter.

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