20.5mm Countersink 90° High-Speed Steel Extra-Long Shank 3-Flute, Cylinder Shank - TECWERK

Benefit from a blend of HSS construction, a 90° countersink angle and a 3‑flute, chatter‑free geometry to achieve consistent countersinking and burr‑free finishes in a variety of materials; order the TECWERK countersink directly via Metav Werkzeuge or consult our specialists for application guidance.

TECWERK Countersink DIN 335 C 90° D 20.5 mm HSS – Extra‑long, 3‑flute

The TECWERK Countersink DIN 335 C 90° D 20.5 mm HSS is an extra‑long, three‑cutting‑edge countersink designed for accurate countersinking and deburring of drilled holes in steel, castings and non‑ferrous metals.

• HSS, DIN 335 C standard
• 90° countersink angle for universal use
• 3‑flute design for chatter‑free cutting
• Extra‑long cylindrical shank for extended reach

Precision performance for repeatable countersinking

Made to the DIN 335 C specification and produced from HSS, this countersink delivers durable, high‑temperature resistance and stable cutting behaviour under industrial conditions. The 90° point angle provides a clean seat for standard fasteners and a predictable chamfer profile. With a 3‑flute geometry the cutter maintains consistent chip evacuation and reduces vibration, which translates into a chatter‑free finish and fewer reworks. For workshops and production lines seeking measurable quality, these characteristics support reproducible results and reduce cycle time variability.

Design that extends reach and stabilises cut quality

The tool’s extra‑long shank and cylindrical shank enable deeper countersinking operations and secure clamping in standard toolholders, extending the range of accessible workpieces without compromising rigidity. The three cutting edges are balanced to lower cutting forces, which is especially valuable when working with thin walls or brittle cast parts. Practical machining data is provided with the tool: feed in steel up to 500 N: 0.2 mm/rev, a guideline that helps to set feeds for power‑efficient, controlled material removal. Novice users will find that following this metric reduces edge chipping and extends tool life.

Broad material compatibility and operational benefits

This countersink is suitable for steel, castings and non‑ferrous metals, making it a versatile addition to metalworking shops and maintenance departments. The HSS substrate combines toughness with wear resistance for general‑purpose countersinking, while the balanced flute design ensures effective chip formation in softer alloys as well as tougher steels. The extra length aids in handling complex assemblies and recessed holes; the result is cleaner deburring, better seating for fixings and fewer touch‑ups on the finished component. For buyers prioritising reliability and supply chain transparency, Metav’s distribution ensures steady availability and informed advice for integration into production processes.

For specialist advice on employing the TECWERK HSS countersink in specific applications and to secure reliable supply from Metav Werkzeuge contact Metav Werkzeuge via info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 2000865394NW
• Description: Kegelsenker DIN 335C 90Grad D.20,5mm HSS ü.-lang Z.3 TECWERK
• Manufacturer: TECWERK
• Packaging unit: 1

Core Specifications

• Diameter: 20.5 mm
• Countersink angle: 90°
• Material: HSS
• Standard: DIN 335 C
• Cutting edges: 3
• Recommended feed in steel up to 500 N: 0.2 mm/rev
• Shank type: Cylindrical
• Length: overlong (extra‑long)

Applications & Features

• For countersinking and deburring holes
• Suitable for steel, castings, non‑ferrous metals
• Chatter‑free cutting due to 3‑flute geometry
• Extra‑long shank for deeper access
• Cylindrical shank for secure clamping

FAQ

Which materials can be countersunk with this tool?
The TECWERK countersink is suitable for steel, castings and non‑ferrous metals, allowing versatile use across general metalworking and maintenance tasks.

What does DIN 335 C indicate for this countersink?
DIN 335 C denotes the geometric standard for conical countersinks; the designation on this TECWERK tool confirms adherence to industry norms for angle, flute geometry and fit.

How does the extra‑long shank affect performance?
An extra‑long shank gives the countersink extended reach for recessed or awkwardly positioned holes while the cylindrical shank maintains secure clamping and axial stability during cutting.

Will the 3‑flute design prevent chatter on thin or delicate parts?
Yes, the three cutting edges balance cutting forces and improve chip control, helping the tool produce a chatter‑free finish even on thinner sections and mixed materials.

What machining data is recommended for initial setup?
As an initial guideline, use a feed of 0.2 mm/rev in steel up to 500 N and adjust spindle speed and feed rate according to machine rigidity and workpiece characteristics to optimise finish and tool life.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com