31mm Countersink 90° HSSE-Co 5-Flute UltimateCut Reduced Cutting Forces, High Wear Resistance - Ruko GmbH

Benefit from significantly reduced axial and radial forces, a variable relief geometry and HSSE‑Co 5 construction for improved wear resistance and quieter operation; these attributes combine to deliver precise, rattle‑free countersinks and greater process stability. Order the tool directly via Metav Werkzeuge or consult their specialists for application support.

ULTIMATECUT 90° Conical Countersink D31 mm (HSSE‑Co 5) by RUKO

The ULTIMATECUT is a high‑performance 90° conical countersink designed for precise, rattle‑free screw seating and demanding industrial countersinking tasks

• Countersink to DIN 335C, 90° geometry
• HSSE‑Co 5 for high wear resistance
• Extra‑wide flute for optimised chip evacuation

Lower machine load and higher process reliability

The reworked cutting geometry reduces both axial and radial forces, which lowers the feed force required during countersinking and decreases stress on spindles and fixtures. A reduced force requirement enables stable operation even under heavier engagement; in steel the tool is rated for feeds of 0.2 mm/rev at feed forces up to 800 N, offering a measurable basis for process planning. This combination of predictable load behaviour and robust material enables a smoother production flow and fewer interruptions, translating into fewer tool changes and more consistent cycle times.

Consistently precise, rattle‑free finish

A specially designed, variably contoured relief grind produces a very calm cutting action, yielding an exact, round and rattle‑free countersink surface. The tool’s geometry suppresses chatter and prevents material smearing, which is particularly important where screw seating and sealing depend on dimensional consistency. As a result, components benefit from improved assembly fit and a higher first‑time‑right rate, reducing rework and ensuring repeatable quality across batches.

Optimised chip and heat control for extended life

Carefully selected chip‑space parameters — chip angle, transition radius and an extra‑wide flute — provide efficient chip evacuation and heat dissipation, which counteracts material adhesion and extends tool life. The combination of these features reduces the tendency for weld build‑up on the cutting edges and maintains performance across a wide range of cutting speeds. The overall effect is high wear resistance and fewer downtimes for dressing or replacement, making the countersink suitable for both short runs and larger production series.

Practical guidance for reliable countersinking results

The design supports effective machining at both low and high cutting speeds without compromising the quality of the chamfer. Thanks to the geometry, significantly less axial force is needed during the operation, which simplifies clamp and fixture design and improves operator safety during manual setups. For integration into CNC programmes or process sheets, the tool’s stable behaviour and clear feed indication (0.2 mm/rev at up to 800 N in steel) provide a reliable starting point for machining tests and parameter optimisation. The ULTIMATECUT is therefore well suited to demanding industrial applications where precision and throughput matter.

For demanding countersinking tasks, request the RUKO ULTIMATECUT D31 mm countersink via Metav Werkzeuge GmbH—contact +49 2822 7131930 or info@metav-werkzeuge.com for tailored technical advice and rapid supply from Emmerich

Technical Data

• Article number: 8000422469NW
• Description: Conical countersink ULTIMATECUT DIN 335C, 90° D31 mm, HSSE‑Co 5, 3 flutes, RUKO
• Packaging unit: 1

Facts

• Diameter: 31 mm
• Angle: 90°
• Standard: DIN 335C
• Flutes: 3
• Feed in steel (up to 800 N): 0.2 mm/rev

Special features

• Revised cutting geometry reducing axial and radial forces
• Variable relief grind for calm, rattle‑free countersinking
• Extra‑wide flute for optimised chip and heat evacuation
• Special span parameters (chip angle, transition radius) to reduce material welding
• High wear resistance across a wide range of cutting speeds

FAQ

What cutting geometry standard does the tool follow?
The RUKO ULTIMATECUT conforms to DIN 335C and features a 90° conical geometry optimised for stable countersinking.

Which tool material is used and what benefit does it bring?
The countersink is manufactured from HSSE‑Co 5, providing enhanced wear resistance and thermal stability for longer tool life.

What feed is recommended for steel applications?
A guideline feed in steel is 0.2 mm/rev at feed forces up to 800 N, giving a reliable starting point for process setup.

How does the geometry affect surface quality?
The variable relief and refined cutting edges produce an exact, round and rattle‑free surface, reducing rework and improving assembly fit.

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