ONHF050408-F67 WKP25S WKP25S Wendeplatten - Walter Tools

Benefit from consistent chip control and extended tool life provided by the WKP25S Tiger·tec Silver grade together with the robust F67 chipbreaker and 0° negative rake geometry; ideal for productive steel and cast-iron machining. Order the insert directly via Metav Werkzeuge or contact our consultants for geometry and application advice.

ONHF050408-F67 WKP25S indexable milling insert by Walter Tools — Tiger·tec Silver, negative 0° rake

A high-performance indexable milling insert designed for machining steel and cast iron, combining the WKP25S coated carbide grade with an octagonal form and F67 chipbreaker for dependable chip control

• Tiger·tec Silver coated carbide grade WKP25S
• Octagonal shape for multiple cutting edges
• 0° negative rake for stable cutting conditions
• 0.8 mm corner radius for reliable edge strength

Durable grade optimised for steel and cast iron

The insert uses the Tiger·tec Silver coating technology paired with the WKP25S grade, which is developed specifically for the thermal and abrasive demands of ISO groups P (steel) and K (cast iron). This combination provides improved resistance to flank wear and stable chip formation, reducing unscheduled tool changes. The engineered coating and substrate balance wear resistance and toughness so that the cutting edge preserves geometry over longer production runs, resulting in more consistent component quality and fewer interruptions.

Geometry and chip control that enhance process security

With an octagonal plate shape and the F67 chipbreaker, the insert offers multiple effective cutting edges and optimised chip evacuation for interrupted and continuous cuts. The 0° negative rake design increases edge robustness and dampens cutting forces, which benefits operations with variable depths of cut or unstable setups. A 0.8 mm corner radius contributes to edge strength while maintaining surface finish; explained simply, a larger corner radius reduces local stress on the edge and improves repeatable performance.

Practical benefits for productivity and tool life

The insert’s configuration supports stable machining under higher feed and moderate cutting speeds, translating into better productivity per tool index. The combination of coated carbide technology and a proven chipbreaker yields measurable reductions in wear progression and the frequency of index changes. For planning, this means fewer tool interventions and steadier cycle times, helping to improve overall process throughput in milling operations that prioritise both component quality and machine uptime.

Handling, typical uses and set-up notes

Intended primarily for end and face milling applications in steel and cast iron, the insert is compatible with toolholders that accept the ONHF050408-F67 geometry. During initial implementation, follow the machine builder’s recommendations for cutting data and ensure secure clamping of the insert seat for best results with the WKP25S grade. If uncertain about feed, speed or clamping, technical support is available to match cutting parameters to the component material and machine capabilities.

Contact Metav Werkzeuge for tailored cutting data and supply of Walter Tools Tiger·tec Silver inserts to ensure optimal machining performance

Technical Data

• Article number: ONHF050408-F67-WKP25S-WALTER
• Item name: Fräswendeschneidplatte ONHF050408-F67 WKP25S
• Series: Tiger·tec Silver
• Grade: WKP25S
• Geometry: ONHF050408-F67
• Chipbreaker: F67
• Shape: octagonal
• Size: 05
• Thickness: 04
• Corner radius: 0.8 mm
• Free rake angle: 0° (negative)
• Tolerance class: H
• Material designation: P / K (steel and cast iron)
• Manufacturer: Walter Tools
• SKU: ONHF050408-F67-WKP25S-WALTER

Facts

• Compatible with ISO groups P and K
• Coated cemented carbide grade
• Designed for stable chip formation and wear resistance
• Multiple cutting edges per insert due to octagonal form

Special features

• Tiger·tec Silver coating technology
• WKP25S: coated carbide grade optimised for steel and cast iron
• F67 chipbreaker for controlled chip formation
• 0° negative rake for increased edge strength

FAQ

What materials is this insert suitable for?
The ONHF050408-F67 WKP25S indexable milling insert is specified for ISO groups P and K, meaning it is suitable for steel and cast iron machining.

How does the Tiger·tec Silver grade benefit production?
Tiger·tec Silver with the WKP25S grade enhances wear resistance and edge stability, helping the insert maintain cutting geometry and extend tool life under typical milling conditions.

What does the 0° negative rake mean for cutting performance?
A 0° negative rake increases edge robustness and reduces the tendency for edge chipping, making the insert suitable for interrupted cuts and less rigid setups when used in Walter Tools tooling systems.

Is the octagonal shape advantageous?
Yes — the octagonal form provides multiple usable cutting edges per insert, improving cost efficiency and reducing downtime between index changes.

Which chipbreaker should be chosen for heavy roughing?
The F67 chipbreaker fitted to this insert is designed for reliable chip control in a range of milling operations; for very heavy roughing consult cutting data to confirm best performance.

Manufacturer/Responsible: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen, Germany

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