VCMT160404-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of reliable chip control, dedicated cast-iron performance and proven Tiger‑tec Silver coating for consistent productivity; order the insert directly via Metav Werkzeuge or consult our technical advisors for machining parameter optimisation.

VCMT160404-RK4 WKK20S turning indexable insert — Rhombic 35°, 7° clearance by Walter Tools

VCMT160404-RK4 WKK20S is a coated turning insert engineered for economical, high‑quality machining of cast iron components in series production

• VCMT160404-RK4 WKK20S by Walter Tools
• Tiger‑tec Silver coating for cast iron
• Rhombic 35° form with 7° clearance
• RK4 chipbreaker for short, controlled chips

Consistent chip control and machining stability for cast iron

The insert delivers stable chip formation through its RK4 chipbreaker, which is optimised for the short, brittle chips typical of cast iron. The chipbreaker profile reduces the risk of clogging and supports uninterrupted cutting, which directly contributes to higher process reliability and fewer tool changes. The WKK20S grade, as part of the Tiger‑tec Silver series, is a coated carbide formulation designed to resist the abrasive wear characteristic of grey and nodular cast irons; this reduces flank wear and extends effective cutting life while maintaining repeatable surface quality.

Geometry and edge design that improve edge strength and surface finish

Built on a rhombic 35° platform with a 7° clearance angle and a 0.4 mm corner radius, the insert balances cutting edge strength with accessible cutting action. The small corner radius supports fine finishing passes without sacrificing robustness on interrupted cuts, while the positive clearance angle lowers cutting forces and heat generation. For machinists unfamiliar with the terms: the rhombic 35° shape provides a compact insert nose that suits turning operations with controlled feed directions, and the corner radius determines the allowable feed and the achievable surface roughness.

Economic benefits and recommended application range

The set-up is particularly well suited to medium‑ and high‑volume work on cast iron components where tool life and part consistency matter. The WKK20S grade targets abrasive wear and frequent short chips, offering a good compromise between wear resistance and toughness. As a result, cycle times can be sustained with less frequent intervention, improving overall equipment effectiveness. For users seeking straightforward implementation, the insert’s standard designation ensures compatibility with common turning toolholders, simplifying logistics and tool management.

Practical notes on selection and use

When selecting cutting parameters, start from conservative speeds for interrupted cuts and increase gradually to exploit the Tiger‑tec Silver coating’s thermal and wear resistance. The RK4 chipbreaker supports tight chip control at conventional feeds; if a heavier roughing cut is planned, adjust feed and depth to keep the chip thickness within recommended ranges. The insert’s execution code and tolerance class indicate production consistency; this benefits applications where reproducibility and minimal sorting are required.

Contact Metav Werkzeuge for tailored recommendations on Walter Tools VCMT160404-RK4 WKK20S and to discuss optimal machining parameters for cast iron applications

Technical data

• Article number: VCMT160404-RK4-WKK20S-WALTER
• Designation: VCMT160404-RK4
• Full designation: VCMT160404-RK4 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver
• Grade: WKK20S

Facts

• Plate size: 16
• Corner radius: 0.4 mm
• Clearance angle: 7°
• Plate thickness code: 04
• Tolerance class: M

Special features

• Chipbreaker: RK4
• Plate form: Rhombus 35°
• Material application: cast iron (K)
• Execution: T
• Coating technology: Tiger‑tec Silver

FAQ

What materials is this insert designed for?
The VCMT160404-RK4 WKK20S insert is designed primarily for cast iron machining and its WKK20S grade is optimised for the abrasive wear and short chips typical of those materials.

How does the RK4 chipbreaker affect machining?
The RK4 chipbreaker produces short, controlled chips that reduce the risk of entanglement and improve process stability when turning cast iron with the VCMT160404-RK4 WKK20S insert.

What benefit does the Tiger‑tec Silver coating provide?
The Tiger‑tec Silver coating increases wear resistance and thermal stability on coated carbide grades such as WKK20S, helping to extend tool life and maintain surface quality in continuous production.

Protected trademarks and trade names remain the property of their respective owners. Brand names and protected trade names are mentioned solely for explanatory purposes. There is no connection between our company and the named brands. The offered article is an original, factory‑new product of the manufacturer.

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