CNMG120412-RP5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of a wear-resistant Tiger·tec Silver grade and a precise RP5 chipbreaker for consistent performance in cast-iron turning; efficient machining and reliable edge life support productive series work. Order the insert directly via Metav Werkzeuge or consult the Metav team for application matching and stock information.

CNMG120412-RP5 WKK20S — turning insert, Tiger·tec Silver, for cast iron | Walter Tools

The CNMG120412-RP5 WKK20S is a rhombic 80° turning indexable insert designed for robust, repeatable machining of cast iron components in series production.

• Tiger·tec Silver coating technology
• Optimised for abrasive cast-iron wear
• Rhombic 80° geometry, 1.2 corner radius

Consistent productivity thanks to the Tiger·tec Silver grade

The Tiger·tec Silver coating and the WKK20S grade are engineered for cast iron machining, addressing the high abrasive wear and frequently short, breaking chips typical of these materials. The coated carbide composition provides a balance between wear resistance and toughness, which reduces unexpected tool changes and stabilises cycle times in batch production. The RP5 chipbreaker supports predictable chip formation, lowering the risk of built-up edge and improving process reliability during continuous operation.

Geometry and chip control that support dimensional accuracy

The rhombic 80° insert shape with a 1.2 mm corner radius and a 0° (negative) relief angle delivers robust cutting performance and stable cut entry. This geometry helps maintain consistent radial support and reduces vibration in interrupted cuts, which preserves surface finish quality and repeatability on turned components. The RP5 chipbreaker is optimised to break chips reliably when machining grey and nodular cast irons, enabling safer chip evacuation and fewer manual interventions at the machine.

Designed for long, predictable edge life under abrasive conditions

The WKK20S grade is formulated to withstand abrasive wear commonly encountered with cast-iron workpieces; the coating technology lowers flank and crater wear while retaining a resilient cutting edge. In continuous or high-volume turning, the combination of coated carbide and the insert’s negative rake provides an advantageous wear profile, meaning fewer indexings and more consistent component tolerances across a batch. This contributes to lower overall process costs and higher machine uptime.

Integration and handling in the workshop

The insert’s ISO designation and standard CNMG form make it compatible with a wide range of clamping systems and toolholders that accept rhombic 80° cartridges. The CNMG120412-RP5 WKK20S insert is a suitable choice where stable chip control, abrasion resistance and predictable edge life are priorities. For new setups, trial cuts at recommended feeds and speeds for cast iron are advised to confirm optimal parameters; the insert’s structural robustness allows for modest adjustments without rapid wear escalation.

Contact Metav Werkzeuge for application advice and fast availability of Walter Tools inserts; refer to CNMG120412-RP5 WKK20S for precise order and process support.

Technical data

• Article number: CNMG120412-RP5-WKK20S-WALTER
• ISO designation: CNMG120412-RP5 WKK20S
• Series: Tiger·tec Silver
• Manufacturer: Walter Tools

Core specifications

• Insert size: 12
• Thickness code: 04
• Corner radius: 1.2 mm
• Relief angle: 0° (negative)
• Tolerance class: M

Materials & special features

• Grade/sort: WKK20S (coated carbide)
• Chipbreaker: RP5
• Plate form: Rhombus 80°
• Material application: cast iron

FAQ

Is this insert suitable for machining cast iron?
Yes. The CNMG120412-RP5 WKK20S from Walter Tools is specifically formulated for cast-iron machining, with a coated carbide grade and RP5 chipbreaker optimised for abrasive cast-iron chips.

What does Tiger·tec Silver mean for performance?
Tiger·tec Silver denotes a coated carbide technology that enhances wear resistance and thermal stability; in the CNMG120412-RP5 WKK20S this results in longer edge life and more consistent cutting performance on abrasive materials.

Can this insert be used in standard CNMG toolholders?
The insert follows the CNMG ISO form and fits toolholders designed for rhombic 80° CNMG inserts; compatibility should be confirmed against the specific holder and clamping system.

How does the RP5 chipbreaker affect chip control?
The RP5 chipbreaker is tuned for reliable chip segmentation when turning cast iron, promoting safer chip evacuation and reducing the likelihood of entangling or continuous swarf.

What edge life benefits can be expected in series production?
The coated WKK20S grade combined with the negative relief geometry supports predictable wear progression, which helps extend intervals between indexing and maintain component tolerances in repeated batches.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected designations are mentioned for explanatory purposes only. There is no connection between our company and the mentioned brands. The offered article is original, brand-new goods from the manufacturer.