20.5mm Countersink 90° Carbide Blank 3-Flute 10mm Shank Low-Speed Deburring, - Ruko GmbH

The combination of CBN‑ground deep flutes and solid‑carbide construction ensures burr‑ and chatter‑free countersinking with long tool life; ideal for precision deburring and recessing operations. Order this tool or request selection advice directly via Metav Werkzeuge for fast, reliable supply.

RUKO conical countersink DIN 335‑C — solid‑carbide 90° Ø20.5 mm, 3‑flute

RUKO conical countersink DIN 335‑C is a solid‑carbide countersink designed for burr‑free countersinking, deburring and recessing in steelwork and industrial workshops.

• CBN‑ground flutes for ultra‑sharp cutting edges
• Solid carbide for maximum rigidity and life
• 90° geometry for precise countersinking and recessing

Clean, repeatable edges for finishing operations

The tool is engineered to deliver burr‑free results thanks to its deep, CBN‑ground flutes, which produce consistently sharp cutting edges. The three‑flute configuration balances material evacuation and cutting stability, reducing vibration and the risk of chatter that can spoil component faces. With a classic 90° cone angle, the geometry provides accurate countersink seats for fastener heads and clean recesses, translating technical reliability into fewer rework cycles and steadier output in repetitive production tasks.

Stability, feed guidance and machining behaviour

Built from solid carbide, the countersink offers rigidity and dimensional stability during plunge and radial work. The tool features a 10 mm shank for secure clamping and balanced run‑out in standard toolholders. For steel applications up to the specified load, the documented feed is 0.2 mm/rev, with best results achieved at low cutting speeds to preserve edge sharpness and avoid thermal loading. These parameters support a predictable cycle time and extend effective tool life, making the cutter a pragmatic choice where consistent finish and process control are priorities.

Practical use cases and workshop advantages

This countersink is suited to industrial workshops, maintenance departments and production lines that require dependable deburring and countersinking with minimal secondary finishing. The uncoated, blank cutting surface and the CBN‑ground flute profile are optimised for operations where clean, chatter‑free holes and recesses are essential. Supplied as a single unit with the referenced SKU, the tool integrates easily into existing machining setups and supports manufacturers seeking improved first‑pass quality without complex process changes.

Contact Metav Werkzeuge in Emmerich for availability and technical advice on this RUKO solid‑carbide countersink: info@metav-werkzeuge.com | +49 2822 7131930

Technical data

• Article number: 4000601478NW
• Product: Conical countersink DIN 335‑C, 90°, Ø20.5 mm, solid carbide, 3 flutes, shank Ø10 mm, uncoated, RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Facts

• Diameter: 20.5 mm
• Angle: 90°
• Shank diameter: 10 mm
• Flutes: 3
• Feed in steel up to 500 N: 0.2 mm/rev
• SKU/UID: 4000601478NW

Special features

• Solid carbide (HM) material
• Uncoated (blank)
• CBN‑ground deep flutes for ultra‑sharp edges
• Designed for burr‑ and rattle‑free countersinking, deburring and recessing
• Best results at low cutting speed

FAQ

What is the recommended feed for this countersink in steel?
The recommended feed for the RUKO conical countersink in steel up to 500 N is 0.2 mm/rev, as specified for stable, burr‑free performance.

Which shank size does the tool require for secure clamping?
The tool has a 10 mm shank and requires a compatible 10 mm collet or holder for correct clamping and run‑out control.

Is the cutting surface coated?
The RUKO countersink is supplied uncoated (blank); the CBN‑ground flutes provide the cutting performance rather than a coating.

For which operations is this countersink designed?
This countersink is intended for countersinking, deburring and recessing, providing clean edges and reliable seat geometry for fastener heads and reamed finishes.

Does the tool reduce vibration and chatter compared with conventional countersinks?
Yes, the combination of CBN‑ground deep flutes and the solid‑carbide body is designed to reduce vibration and chatter, enabling smoother cutting and improved surface results.

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