31mm Countersink 90° Three-Point, Solid Carbide Blank Shank 12mm, CBN-Ground Flutes, For Deburring/Spotfacing - Ruko GmbH

Take advantage of a solid carbide 90° countersink with CBN-ground flutes for burr-free, chatter-free countersinking and reliable deburring; order the countersink directly via Metav Werkzeuge or consult our advisors for application support.

Ruko Countersink DIN 335C — 90° conical countersink, 31 mm, solid carbide (HM), 12 mm shank

Ruko Countersink DIN 335C is a precision conical countersink designed for clean sinking, deburring and chamfering in production and workshop environments

• Solid carbide construction
• 90° precision countersink
• CBN-ground flutes for sharp edges
• 12 mm shank for secure clamping

Precision design for burr-free finishing

The tool is manufactured from solid carbide, providing rigidity and dimensional stability that supports consistent results in series production. The 90° conical geometry ensures predictable chamfer dimensions and flat-bottom seatings, while the three-flute design promotes smooth chip evacuation. The CBN-ground flutes produce exceptionally sharp cutting edges, which is why the tool excels at burr-free and rattle-free countersinking and deburring operations. This combination of material and flute geometry reduces the need for secondary finishing and helps maintain component tolerances.

Optimised cutting parameters for longer tool life

Designed for best results at low cutting speed, the countersink achieves fine surface quality without aggressive spindle demands. The specified operating guideline of 0.22 mm/rev feed in steel up to 500 N provides a concrete starting point for process setup and helps avoid chatter while maintaining efficient material removal. Lower surface speed and the uncoated cutting geometry reduce heat generation at the cutting edge, supporting longer edge life and repeatable quality across batches. These rational performance parameters simplify process planning and make integration into existing machining cycles straightforward.

Secure handling and industrial readiness

A 12 mm shank offers stable clamping in standard collets and holders, minimising runout and improving concentricity when sinking pocketed or through holes. The uncoated (blank) finish suits a range of workshops where coated tools are not required or where coolant strategy and workpiece material favour direct carbide cutting. The tool is primarily specified for conical sinking, deburring and chamfering tasks and is particularly effective where a vibration-free finish is essential. For purchasers seeking dependable supply and expert advice, Metav Werkzeuge combines warehouse availability with technical guidance from Emmerich, supporting reliable procurement for industrial and trade users.

Contact Metav Werkzeuge for tailored advice on integrating this solid carbide countersink into production and to secure dependable supply from Emmerich — eMail: info@metav-werkzeuge.com · Tel: +49 2822 7131930

Technical data

• Article number: 4000601480NW
• Product name: Kegelsenker DIN 335C 90° D31 mm HM Blank Z.3 Schaft-D.12 mm (translated)
• Brand: Ruko
• Packaging unit: 1

Facts

• Diameter: 31 mm
• Angle: 90°
• Shank diameter: 12 mm
• Number of flutes: 3
• Feed in steel up to 500 N: 0.22 mm/rev

Special features

• Solid carbide (HM)
• Uncoated (blank)
• CBN deep-ground flutes for absolutely sharp edges
• For burr-free and chatter-free countersinking, deburring and sinking
• Best results at low cutting speed

FAQ

What applications is this countersink suited for? This countersink is intended for precision countersinking, deburring and sinking operations where a clean, burr-free finish is required; the tool is optimised for such finishing tasks.

What are the main dimensional features to check for fixturing? Check the 31 mm cutting diameter and the 12 mm shank diameter to ensure compatibility with collets and toolholders; the 90° geometry defines the conical seat angle.

Which material offers the best performance settings for this tool? The tool gives best results at low cutting speeds; for steels with forces up to 500 N the recommended feed guideline is around 0.22 mm/rev for consistent finishes.

How do the CBN-ground flutes affect performance? CBN deep-ground flutes provide extremely sharp cutting edges that reduce burr formation and minimise chatter, resulting in finer surface quality without additional rework.

Is the tool coated and what does that mean for use? The tool is supplied uncoated (blank) in solid carbide, which suits applications where a coating is unnecessary or where specific coolants and materials favour an uncoated geometry.

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