TCMT16T312-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Benefit from reliable, productive cast iron machining thanks to the combination of the Tiger·tec Silver grade and the RK4 chipbreaker: efficient chip control, long wear life and consistent edge stability reduce downtime and improve process security. Order the insert directly via Metav Werkzeuge or consult the technical team for cutting data.

TCMT16T312-RK4 WKK20S — triangular 60° indexable turning insert, 1.2 mm corner radius (Walter Tools)

The TCMT16T312-RK4 WKK20S is a coated carbide triangular turning insert designed for cast iron applications, offering stable chip formation and high wear resistance for demanding roughing and medium-finishing operations.

• Tiger·tec Silver coating for wear resistance
• Optimised for cast iron (ISO K)
• Triangle 60° form for flexible indexing
• 1.2 mm corner radius for edge strength

Consistent process security for abrasive cast iron turning

The combination of the WKK20S coated-carbide grade and the Tiger·tec Silver technology is tailored to the abrasive nature of cast iron. The coating improves resistance to adhesive and abrasive wear while the substrate maintains fracture toughness, resulting in a longer effective tool life and predictable performance. The RK4 chipbreaker is specifically configured to handle short, brittle chips common with cast iron, reducing risk of built-up edge and improving machine uptime. This translates into fewer insert changes and steadier cycle times, which is crucial in 24/7 production environments.

Geometry that balances strength and surface quality

A triangular 60° plate form provides three usable cutting edges and straightforward indexing, supporting both productivity and economy. The 1.2 mm corner radius increases edge robustness, so the insert resists chipping during interrupted cuts or when taking heavier depths of cut. The 7° relief angle reduces rubbing on the flank and helps maintain dimensional accuracy over longer tool life. With a plate size of 16 mm and T3 thickness, the insert fits common turning toolholders while offering a compromise between rigidity and accessibility for intricate contours.

Easy process integration and predictable results

As an indexable insert, this design simplifies stocking and replacement compared with brazed or solid-carbide alternatives. The WKK20S grade delivers a predictable wear curve that supports consistent surface finish and repeatable component tolerances, making it suitable for batch production or single-part machining alike. The insert’s chip control and geometry reduce the need for extensive trial-and-error when setting cutting parameters; however, Metav Werkzeuge can supply recommended cutting data for specific machines and workpiece grades. The result is a robust, economical option for cast iron turning that aligns with modern production requirements.

Contact Metav Werkzeuge to discuss Walter Tools TCMT16T312-RK4 WKK20S inserts, request tailored cutting parameters or arrange a quotation via info@metav-werkzeuge.com or by phone at +49 2822 7131930

Technical Data

• Article number: TCMT16T312-RK4-WKK20S-WALTER
• ISO designation: TCMT16T312-RK4 WKK20S
• Product type: Bohr-/Aufbohrwendeschneidplatte / Drehwendeschneidplatte
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Facts

• Corner radius: 1.2 mm
• Relief angle: 7°
• Plate form: Triangle 60°
• Plate size: 16 mm
• Plate thickness: T3
• Tolerance class: M

Special features

• Grade/coating: WKK20S (Tiger·tec Silver)
• Chipbreaker: RK4
• Material application: cast iron (ISO group K)
• Coated carbide
• Stable chip formation and wear resistance

FAQ

Which materials is this insert designed for?
The TCMT16T312-RK4 WKK20S insert from Walter Tools is optimised for cast iron (ISO group K); the WKK20S grade and Tiger·tec Silver coating address the abrasive and short-chip characteristics of these materials.

What advantages does the RK4 chipbreaker provide?
The RK4 chipbreaker ensures controlled, short chips in cast iron turning, improving swarf evacuation and reducing the chance of built-up edge, which helps maintain consistent cutting forces and surface quality.

How does the 1.2 mm corner radius affect performance?
A 1.2 mm corner radius increases edge strength and resistance to chipping during interrupted cuts or heavier feeds, while still allowing acceptable surface finishes for roughing and semi-finishing operations with this insert type.

Is this insert compatible with common turning toolholders?
Yes, the TCMT16T312-RK4 WKK20S triangular insert is compatible with standard toolholders that accept TCMT inserts; its 60° form and 16 mm size support straightforward indexing and economical edge utilisation.

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

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