TCMT090208-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of dependable chip control, targeted wear resistance and a compact triangular form for efficient cast iron turning and boring. Order original Walter Tools inserts via Metav Werkzeuge or request consultancy for application-specific machining parameters.

TCMT090208-RK4 WKK20S triangular turning/boring insert by Walter Tools — Tiger·tec Silver coated, for cast iron

TCMT090208-RK4 WKK20S is a triangle 60° indexable insert designed for turning and boring applications, optimised for abrasive cast iron machining with a focus on stable chip formation and consistent tool life.

• WKK20S coated carbide for cast iron machining
• Triangle 60° insert with 0.8 mm corner radius
• RK4 chipbreaker for reliable chip control
• 7° clearance angle for reduced rubbing

Consistent performance for abrasive cast iron machining

The Tiger·tec Silver coating combined with the WKK20S grade provides a wear-resistant cutting surface specifically engineered for cast iron. This combination addresses abrasive wear and the typically short, brittle chip forms produced when machining grey and nodular cast irons. The result is a stable cutting edge and predictable tool life, which reduces unplanned interruptions in production. For workshop managers and production engineers, this means fewer insert changes and improved process stability when turning or boring cast-iron components.

Chip control and surface quality that support productivity

Equipped with the RK4 chipbreaker, this insert promotes controlled chip segmentation and evacuation, which is particularly beneficial in interrupted cuts and deep bore operations. The controlled chip form lowers the risk of built-up edge and improves surface finish consistency, enabling higher feed rates with maintained component integrity. The 0.8 mm corner radius balances edge strength and finish quality, offering a compromise between robust cutting performance and a fine surface result when required.

Geometry and mounting advantages for cost-effective use

The triangle 60° form gives three usable cutting edges per indexable insert, increasing the number of re-grinds or indexes available before replacement. The compact 02 thickness (as specified) and the 7° clearance angle minimise flank contact and reduce frictional heating, which helps preserve the coating and substrate under typical cast iron cutting conditions. These geometric features translate into economical edge utilisation and lower per-component tooling cost across medium- to high-volume runs.

Practical selection and machining guidance

When selecting parameters, consider the abrasive nature of cast iron: moderate cutting speeds with appropriate coolant strategy and steady feed rates will extend the life of the coated carbide grade. The insert is intended for turning and boring operations where chip control and process repeatability matter; pairing the insert with a stable toolholder and correct seat geometry will leverage the Tiger·tec Silver advantages fully. For production environments prioritising uptime, the insert’s predictable wear behaviour supports planned maintenance intervals and reduces variability in part quality.

For tailored recommendations or to order original Walter Tools Tiger·tec Silver inserts, please contact Metav Werkzeuge — Metav’s technical consultants provide machining parameter suggestions and availability guidance.

Technical Data

• SKU: TCMT090208-RK4-WKK20S-WALTER
• Designation: TCMT090208-RK4 WKK20S
• Manufacturer: Walter Tools
• Product type: Turning / Boring indexable insert

Core specifications

• Insert shape: Triangle 60°
• Corner radius: 0.8 mm
• Clearance angle: 7°
• Chipbreaker: RK4
• Series: Tiger·tec Silver
• Grade: WKK20S
• Thickness code: 02
• Size code: 09
• Tolerance class: M
• Execution: T

Materials and features

• Coating: Tiger·tec Silver (coated carbide technology)
• Material: Coated carbide
• Suitable for: Cast iron machining (K)
• Application focus: Turning and boring with controlled chip formation

FAQ

What materials is this insert suitable for?
The TCMT090208-RK4 WKK20S insert is formulated for cast iron machining; the WKK20S grade and Tiger·tec Silver coating address abrasive wear typical of these materials.

How does the RK4 chipbreaker improve production?
The RK4 chipbreaker on this insert promotes segmented chips and secure evacuation, reducing risks of chip entanglement and improving surface finish during turning and boring.

How many cutting edges are available per insert?
The triangular 60° geometry provides three indexable cutting edges per insert, which increases usable life and cost-efficiency in component production.

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

Walter Tools: The Walter AG (brand appearance: Walter Tools) with headquarters in Tübingen is part of the Sandvik group. Protected trademarks and trade names are the property of their respective owners and are mentioned exclusively for explanatory purposes. There is no affiliation between our company and the mentioned brands. The offered article is an original, factory-new product of the manufacturer.