CNMA120416-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger‑tec Silver wear resistance and the RK5 chipbreaker for efficient cast‑iron turning; the robust 1.6 mm corner radius and Rhombic 80° geometry further secure stable cutting performance. Order the insert directly via Metav Werkzeuge or consult our specialists for application advice.

CNMA120416-RK5 WKK20S — Indexable turning insert, Tiger‑tec Silver, for cast iron — Walter Tools

CNMA120416-RK5 WKK20S is an indexable turning insert designed for productive machining of cast iron with an RK5 chipbreaker

• Tiger‑tec Silver wear protection
• RK5 chipbreaker tuned for cast iron chips
• Rhombic 80° geometry for stable cuts
• 1.6 mm corner radius for robust edge retention

Consistent chip control for abrasive cast‑iron work

The WKK20S grade, a coated carbide from the Tiger‑tec Silver family, is tuned for the abrasive wear and frequently short, breaking chips typical of cast iron. The integrated RK5 chipbreaker actively controls chip form, reducing the risk of chip entanglement and enabling steady material removal rates. For production environments this means fewer interruptions for chip clearance and a lower risk of part damage, which translates into improved throughput and predictable process windows.

Geometry and edge design that improve process stability

The insert’s Rhombic 80° shape combined with a 1.6 mm corner radius provides a balance between strength and finish. The 0° (negative) rake designation increases edge support under heavy cuts and contributes to a more stable cutting line in interrupted or roughing operations. Tolerance class M ensures repeatable indexing and reliable seating in standard toolholders; these geometric choices reduce vibration and help maintain dimensional consistency over longer tool life cycles.

Durable grade and clear application benefits

As a coated carbide insert from Walter Tools, the CNMA120416-RK5 WKK20S offers a wear‑resistant surface that extends tool life in abrasive cast‑iron applications. The coating and substrate combination provides resistance to flank wear and adhesive wear mechanisms encountered in continuous series production. Specifying this insert supports longer uninterrupted runs, less frequent index changes and lower tooling consumption per part, leading to measurable cost‑efficiency in medium to high batch manufacturing.

Practical fitment and shop‑floor considerations

The insert is supplied in the ISO designation CNMA120416-RK5 and matches standard turning toolholders designed for rhombic inserts with an 80° included angle. The RK5 chipbreaker is especially effective when paired with appropriate cutting parameters for cast iron; modest feeds and suitable cutting speeds will produce short, controllable chips and a stable surface finish. Where available, follow Walter Tools’ recommended cutting data for best results and consistent component quality.

For precise selection and swift supply of Walter Tools Tiger‑tec Silver inserts, contact Metav Werkzeuge for tailored application advice and ordering assistance via info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: CNMA120416-RK5-WKK20S-WALTER
• Description: Indexable turning insert, CNMA120416-RK5 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver
• Grade: WKK20S
• Execution: A

Core dimensions

• Inscribed circle: 12 mm
• Corner radius: 1.6 mm
• Thickness code: 04
• Free angle: 0° (negative)
• Tolerance class: M

Special features

• Chipbreaker: RK5
• Shape: Rhombic 80°
• Material application: Cast iron (K)
• Coating technology: Tiger‑tec Silver
• ISO designation: CNMA120416-RK5 WKK20S

FAQ

What materials is this insert suitable for?
The CNMA120416-RK5 WKK20S insert is specified for cast iron machining; the WKK20S grade and RK5 chipbreaker are optimised for the abrasive nature and short‑chip behaviour of cast materials.

How does the RK5 chipbreaker improve machining?
The RK5 chipbreaker on this insert promotes short, manageable chips in cast‑iron turning, lowering the risk of chip buildup and improving process reliability during continuous production.

What advantages does the Tiger‑tec Silver series provide?
Tiger‑tec Silver coating enhances wear resistance and thermal stability, which helps the insert maintain cutting performance and finish quality across longer tool life in abrasive applications.

Why choose a Rhombic 80° insert for turning?
The Rhombic 80° geometry offers a compromise between strong cutting edge support and accessibility for general turning operations; combined with a 1.6 mm corner radius it provides robust performance for both semi‑finishing and roughing.

Is the insert compatible with standard toolholders?
Yes, the ISO designation CNMA120416-RK5 aligns with holders designed for rhombic inserts with an 80° seating angle and tolerance class M, enabling straightforward replacement in common tool systems.

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

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