12.4mm Countersink 90° HSSE-Co5 High Wear Resistance Reduced Cutting Forces - Ruko GmbH

By combining a low-vibration cutting geometry with HSSE‑Co5 material and an extra‑wide chip flute, the countersink delivers precise, chatter‑free chamfers and extended tool life. Order the tool directly via Metav Werkzeuge or consult the team for machining advice.

ULTIMATECUT conical countersink DIN 335C, 90° — D 12.4 mm, HSSE‑Co5 (RUKO)

The ULTIMATECUT conical countersink DIN 335C is a high‑performance 90° countersink designed for industrial and workshop use, engineered for quiet, burr‑free chamfering across a wide range of materials.

• ULTIMATECUT geometry reduces axial and radial forces
• Smooth, chatter-free 90° countersinking
• Wide chip flute for optimal chip and heat removal
• High wear resistance for long tool life

Precision results with reduced cutting forces

The tool's completely redeveloped cutting geometry significantly reduces axial and radial forces during the countersinking operation, resulting in a smooth, rattle‑free finish. The specially crafted, variably profiled relief ensures a stable plunge and produces an exact, circular countersink surface without vibration marks. This stability means fewer rejects and less rework in serial production. The combination of geometry and material treatment supports consistent chamfer quality even when feed and speed vary.

Superior chip evacuation and thermal control

A deliberately wide chip groove and optimised clearance geometry promote effective chip evacuation and enhanced heat dissipation, which together improve overall wear resistance. The cutter is made from HSSE‑Co5, a high‑speed steel with 5% cobalt, which increases red hardness and resistance to thermal softening at elevated cutting temperatures. As a result, the tool maintains edge integrity for longer intervals, reducing downtime for replacements and contributing to a steadier production flow.

Lower feed effort and adaptable cutting speeds

The new geometry also counteracts material smearing and reduces the force needed for penetration, so substantially lower feed forces are required during operation. The tool performs reliably at both relatively high and low cutting speeds without compromising surface quality, offering flexibility across machining setups. This adaptability makes it suitable for varied workshop applications where machine power or spindle speed limitations exist, while still delivering reproducible results.

Practical machining data and workplace benefits

Available in a D 12.4 mm diameter with a 90° point angle and 3 flutes, the countersink supports precise chamfering tasks and stable chip control. For reference, the tool attains the recommended feed in steel up to 800 N of approximately 0.15 mm/rev, balancing material removal and surface finish. Installed in suitable holders, the design minimises chatter and ensures a clean chamfer, helping to shorten cycle times and lower overall production costs through fewer secondary operations.

For low‑vibration, high‑durability countersinking choose the RUKO ULTIMATECUT — contact Metav Werkzeuge for tailored machining advice and fast supply from Emmerich.

Technical data

• Article number: 8000422462NW
• Name: ULTIMATECUT conical countersink DIN 335C, 90° D 12.4 mm HSSE‑Co5 RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1
• UID: 8000422462NW

Key figures

• Diameter: 12.4 mm
• Point angle: 90°
• Flutes: 3
• Recommended feed in steel up to 800 N: 0.15 mm/rev

Special features

• HSSE‑Co5 material
• Newly developed cutting geometry
• Variable relief for quiet countersinking
• Extra‑wide chip flute for improved chip and heat removal
• High wear resistance; reduced material welding
• Suitable for high and low cutting speeds

FAQ

What materials are suitable for this countersink?
The RUKO ULTIMATECUT countersink is designed to deliver strong performance across a broad range of materials and remains effective at both high and low cutting speeds thanks to its HSSE‑Co5 composition and optimised geometry.

What are the precise dimensions and geometry of the tool?
The tool has a diameter of 12.4 mm and a 90° point angle, supplied in a 3‑flute configuration for balanced cutting and chip transport.

What feed rate is recommended for steel applications?
For steel with cutting forces up to 800 N, a feed of about 0.15 mm/rev is indicated to achieve a consistent countersink finish while preserving tool life.

How does the tool reduce vibration and improve surface finish?
The specially developed, variably profiled relief and cutting geometry reduce axial and radial loads during the cut, producing a chatter‑free, round countersink surface with minimal rework.

Is the cutter suitable for production environments?
Yes; the combination of HSSE‑Co5, efficient chip evacuation and reduced cutting forces makes the ULTIMATECUT well suited to serial production and demanding workshop use.

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