10.4mm Countersink 90° Solid Carbide 3-Flute Blank Tip, Shank 6mm, CBN-Ground Flutes - Ruko GmbH

Take advantage of the combination of CBN deep‑ground flutes and a solid carbide body for burr‑free, chatter‑free countersinking and reliable surface quality; order the tool directly via Metav Werkzeuge or consult their advisors for application support.

RUKO Countersink DIN 335C — 90° Ø10.4 mm, solid carbide, 3‑flute, 6 mm shank

A RUKO Countersink DIN 335C 90° Ø10.4 mm engineered for burr‑free countersinking, deburring and spot‑facing in steel under low cutting speeds

• CBN deep‑ground flutes for ultra‑sharp edges
• Solid carbide (HM) body, uncoated (blank)
• Burr‑ and chatter‑free countersinking
• 6 mm straight shank for secure mounting

Precision cutting for consistent, burr‑free results

The design uses CBN‑ground flute geometry so that the deep‑ground flutes produce sharp cutting edges that reduce burring and chatter during operation. This results in a burr‑free finish and less secondary processing; the tool is intended for countersinking, deburring and spot‑facing where surface quality is critical. A specified feed of 0.12 mm/rev in steel up to 500 N provides a measurable baseline for process set‑up and repeatability, helping to stabilise cycle times and minimise rework.

Robust construction compatible with standard toolholders

Constructed from solid carbide (HM) and supplied uncoated (blank), the cutter combines wear resistance with a geometry tuned for low cutting speeds. The 90° point angle and Ø10.4 mm diameter make the item suitable for standard DIN 335C applications, while the 3 flutes provide a controlled cutting action and improved chamfer formation. The 6 mm shank allows secure clamping in common collets and drill chucks, enabling straightforward integration into existing workshop setups without special adaptors.

Improve process efficiency and protect component quality

Sharp edges created by the CBN grinding method lower cutting forces and reduce the risk of chatter, which translates directly into longer tool life and fewer rejects. Best performance is achieved at low cutting speed, where the tool gives precise material removal and consistent countersink geometry. The result is a stable manufacturing step that supports higher first‑pass yield and predictable maintenance intervals, making this countersink a practical choice for small runs and repeat production alike. If uncertainty remains about suitability for specific alloys or setups, Metav offers technical clarification and data upon request.

Talk to Metav Werkzeuge for tailored application advice and reliable supply of RUKO countersinks — call +49 2822 7131930 or email info@metav-werkzeuge.com

Technical data

• Article number: 4000601475NW
• Description: Countersink DIN 335C 90° Ø10.4 mm, HM, uncoated, 3 flutes, 6 mm shank
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Dimensions & performance

• Diameter: Ø10.4 mm
• Angle: 90°
• Shank diameter: 6 mm
• Flutes: 3
• Feed in steel ≤ 500 N: 0.12 mm/rev

Features & application

• CBN deep‑ground flutes for sharp cutting edges
• For countersinking, deburring and spot‑facing
• Best at low cutting speed
• Solid carbide (HM), uncoated (blank)

FAQ

What materials is this countersink suitable for?
The RUKO countersink is designed primarily for steel applications and delivers best results at low cutting speed; the specification notes a recommended feed of 0.12 mm/rev in steel up to 500 N.

Is the tool coated?
This countersink is supplied uncoated (blank) and made from solid carbide (HM) to offer a sharp, wear‑resistant cutting geometry without additional surface coatings.

Which shank size is required for mounting?
A 6 mm shank is provided for secure mounting in standard collets and drill chucks, permitting straightforward integration into typical workshop setups.

What machining operations is the tool intended for?
The tool is intended for countersinking, deburring and spot‑facing, delivering burr‑free and chatter‑free results when used under the recommended conditions.

How does the CBN grinding affect performance?
The CBN deep‑grinding of the flutes produces exceptionally sharp cutting edges, reducing cutting forces and improving surface finish; this enhances process stability and can extend effective tool life.

Manufacturer/Responsible: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen