CNMG120408-RP5 WKK20S WKK20S Wendeplatten - Walter Tools

Benefit from a productive combination of Tiger‑tec Silver coating and the RP5 chipbreaker for consistent, short-chip behaviour in cast iron turning; the negative 0° rake and 0.8 mm corner radius support a robust cutting edge and reliable surface finish. Order the insert directly via Metav Werkzeuge or request technical advice from our consultants.

CNMG120408-RP5 WKK20S turning indexable insert — Tiger‑tec Silver for cast iron (Walter Tools)

CNMG120408-RP5 WKK20S is a rhombic 80° turning indexable insert engineered for productive cast iron machining with a coated carbide grade and RP5 chipbreaker

• Tiger‑tec Silver coating for longer tool life
• RP5 chipbreaker for controlled chip formation
• 0.8 mm corner radius for durable cutting edge
• Designed for cast iron machining (ISO K)

Optimised performance for cast iron turning

The coated carbide grade WKK20S, supplied in the Tiger‑tec Silver series, is tailored to the abrasiveness and short, brittle chips typical of cast iron. The RP5 chipbreaker promotes reliable chip control, reducing interruptions from long, tangled chips and enabling steady material removal. Combined with a negative 0° rake, the insert offers a conservative cutting geometry that favours edge stability under interrupted cuts and heavy engagement, supporting higher cumulative productivity in series production.

Consistent edge life and surface quality

A 0.8 mm corner radius and the rhombic 80° form ensure an even distribution of cutting forces and a predictable wear pattern, which helps to maintain dimensional tolerance and surface finish over longer tool life. The insert’s tolerance class M guarantees repeatable seating and interchangeability in standard toolholders, reducing setup time and the risk of variation between tool changes. The result is fewer secondary operations and improved process reproducibility for cast iron components.

Process reliability and measurable productivity gains

Using a grade engineered for cast iron minimises abrasive flank wear and supports stable chip formation, which directly contributes to lower tool consumption and less machine downtime. The combination of the Tiger‑tec Silver coating and RP5 geometry can lead to measurable gains in throughput and reduced indexable insert turnover, making the tooling choice a rational investment for workshops that prioritise steady cycle times and predictable maintenance intervals.

Typical applications and compatibility

This indexable insert is intended for roughing and medium finishing operations on cast iron (ISO K), where controlled chip breaking and edge security are essential. The plate size (12) and thickness (04) fit commonly used turning toolholders for rhombic inserts; the CNMG120408-RP5 WKK20S excels where intermittent cuts, interrupted profiles or heavy radial depths occur. The coated carbide construction makes it unsuitable to assume performance on steels or stainless steels unless confirmed by machining trials for the specific workpiece.

Contact Metav Werkzeuge today to specify the Walter Tools CNMG120408-RP5 WKK20S for cast-iron turning and request tailored machining parameters or a technical consultation by email at info@metav-werkzeuge.com or by phone at +49 2822 7131930

Technical Data

• Article number: CNMG120408-RP5-WKK20S-WALTER
• Designation: CNMG120408-RP5 WKK20S
• Product type: Drehwendeschneidplatte / turning indexable insert
• Manufacturer: Walter Tools

Facts

• Size: 12
• Thickness: 04
• Corner radius: 0.8 mm
• Rake angle: 0° (negative)
• Shape: Rhombic 80°
• Tolerance class: M

Special features

• Series: Tiger‑tec Silver
• Grade: WKK20S (coated carbide)
• Chipbreaker: RP5
• Application: Cast iron (ISO K)
• Execution: G

FAQ

What materials is this insert designed for? This insert is designed primarily for cast iron machining; the WKK20S grade and RP5 chipbreaker are optimised for ISO K materials and the short, brittle chip behaviour typical of cast iron.

How does the RP5 chipbreaker affect machining? The RP5 chipbreaker on the CNMG120408-RP5 WKK20S promotes short, controlled chips, improving process reliability and reducing the frequency of chip-related interruptions during cast iron turning.

Can the insert be used for heavy interrupted cuts? Yes, the negative 0° rake and 0.8 mm corner radius provide a robust cutting edge suited to intermittent and interrupted cutting conditions commonly encountered in roughing operations.

What does the Tiger‑tec Silver series contribute? The Tiger‑tec Silver coating enhances resistance to abrasive wear and supports consistent edge life on abrasive cast irons, helping to extend tool life and maintain surface quality.

Which toolholders are compatible with this insert form? The rhombic 80° plate and CNMG designation correspond to standard indexable insert toolholders that accept CNMG geometry and size 12 plates.

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

Die Walter AG (brand: Walter Tools) is part of the Sandvik group. Protected trademarks and product names are the property of their respective owners. Brand names are mentioned solely for explanation; there is no affiliation between our company and those brands. The offered item is an original, brand-new product from the manufacturer.