WCMT080412-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Benefit from a wear-resistant coated grade and a controlled chipbreaker that together improve process reliability and reduce downtime; order the insert directly via Metav Werkzeuge or consult our specialists for application-specific advice.

WCMT080412-RK4 WKK20S — Indexable turning insert (Trigon 80°, RK4) by Walter Tools

WCMT080412-RK4 WKK20S is an indexable turning and drilling insert designed for efficient machining of cast iron components in industrial turning operations.

• Tiger-tec Silver coating for long tool life
• WKK20S grade optimised for cast iron
• RK4 chipbreaker for controlled chip formation
• Trigon 80° form with 1.2 mm corner radius

Consistent performance for cast-iron turning

The WKK20S grade, developed within the Tiger-tec Silver family, is specifically formulated for the abrasive nature of cast iron (ISO group K). The combination of a coated carbide substrate and a chipformer engineered for short, brittle chips means the insert delivers predictable wear behaviour and stable cutting forces. For production environments where repeatability is essential, this specification reduces the frequency of tool changes and supports steady cycle times while maintaining component dimensional integrity.

Geometry tailored to stability and edge security

The Trigon 80° outline with a 1.2 mm corner radius and a 7° relief angle promotes a secure cutting geometry that resists edge chipping under interrupted cuts. The RK4 chipbreaker controls chip formation for the typical breakage patterns of cast iron, reducing the risk of built-up edge and workpiece damage. This insert form provides advantageous engagement in turning and bore-facing operations where a balance of strength and cutting efficiency is required, improving process robustness on both finishing and light roughing passes.

Coating and grade that extend productivity

The Tiger-tec Silver coating on this plated carbide grade enhances resistance to abrasion and thermal loading encountered when machining grey and nodular cast irons. Coated substrates reduce flank wear and help preserve the cutting edge, which in turn lowers overall tooling costs through longer intervals between regrinds or exchanges. The grade’s design supports high-volume manufacturing by increasing mean time between interventions and simplifying tool inventory through a versatile, reliable cutting solution.

Practical integration into production workflows

As an indexable insert for turning and drilling applications, the plate is compatible with standard insert clamping systems and fits routines where predictable chip control and repeatable geometry are required. With tolerance class M, it provides repeatable dimensional conformity for mechanical setups. Stocking this insert assists in keeping spindle uptime high and tool-change routines straightforward; combine it with appropriate cutting parameters and coolant strategies for optimal surface finish and insert life.

Contact Metav Werkzeuge for application advice, availability and to discuss how the Walter Tools WCMT080412-RK4 WKK20S insert can be integrated into current processes; email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: WCMT080412-RK4-WKK20S-WALTER
• SKU: WCMT080412-RK4-WKK20S-WALTER
• Brand: Walter Tools
• Series: Tiger-tec Silver
• Grade: WKK20S
• Product type: Indexable turning / drill insert (Trigon)

Core specifications

• Relief angle: 7°
• Corner radius: 1.2 mm
• Insert thickness: 4 mm
• Size designation: 08
• Plate form: Trigon 80°
• Tolerance class: M

Special features

• Chipbreaker: RK4
• Coating: Tiger-tec Silver (coated carbide)
• Optimised application: Cast iron (ISO group K)
• Designed for industrial turning and bore-facing processes

FAQ

Is this insert suitable for machining all types of cast iron?
The WCMT080412-RK4 WKK20S insert by Walter Tools is optimised for the ISO group K category (cast iron) and performs well on typical grey and nodular cast irons; material-specific tests are recommended for specialised alloys.

What cutting behaviour can be expected with the RK4 chipbreaker?
The RK4 chipbreaker on this Walter Tools insert promotes short, controlled chips typical of cast-iron machining, reducing the risk of entangling or long chips and aiding consistent surface quality.

How does the Trigon 80° form influence cutting forces?
The Trigon 80° geometry balances edge strength and cutting engagement, producing stable cutting forces that are particularly beneficial during interrupted cuts and when edge security is a priority.

Can this insert be used for finishing passes?
Yes, the grade and geometry of the WCMT080412-RK4 WKK20S allow for light finishing passes where a combination of dimensional control and surface quality is required, provided appropriate feed and speed parameters are applied.

What does the tolerance class M indicate for shop use?
Tolerance class M denotes a medium tolerance level suitable for general industrial applications, offering a reliable dimensional standard for repeatable tool clamping and indexing.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected product names are mentioned for explanatory purposes only; there is no affiliation between our company and the mentioned brands. The offered item is an original, factory-new product of the manufacturer. The Walter AG (brand appearance: Walter Tools) is part of the Sandvik group.