TNMU160512R-G27 WKK25G Wendeplatten - Walter Tools

Take advantage of a durable Tiger·tec Gold coating and the wear-resistant WKK25G grade for reliable cast iron milling; the combination of a triangle 60° geometry and a 1.2 mm corner radius delivers secure edge strength and predictable chip formation. Order or request application advice directly via Metav Werkzeuge or consult the technical team for cutting data and supply options.

TNMU160512R-G27 WKK25G — milling insert (triangle 60°) for cast iron — Walter Tools

TNMU160512R-G27 WKK25G is a coated carbide milling insert from Walter Tools, engineered for economical and reproducible machining of cast iron components

• Tiger·tec Gold coated carbide
• Optimised for cast iron machining
• Triangle 60° geometry
• Negative 0° rake for stable cut
• 1.2 mm corner radius for edge strength

Consistent chip control and predictable tool life

The WKK25G grade, part of the Tiger·tec Gold series, is a coated carbide designed specifically for the abrasiveness and short, breaking chips typical of cast iron. This combination improves process stability by reducing edge breakdown and smoothing chip evacuation. The G27 chipbreaker is configured to shape chips reliably in intermittent cuts, which lowers the risk of built-up edge and extends the interval between indexings. For production environments where reproducible tool life and low scrap rates matter, these features translate directly into higher uptime and lower total machining cost.

Geometry tailored for secure engagement and surface integrity

The insert's triangle 60° shape and 1.2 mm corner radius provide a balanced contact geometry that supports both roughing and light finishing passes. The negative 0° rake produces a robust cutting edge and reduces the tendency for chatter on heavy cut entries, making the grade suited to interrupted cuts and unstable setups. The size designation 16 and thickness code 05 indicate the insert family and seat compatibility; these dimensional cues simplify toolholder selection and ensure correct clamping for reliable repeatability across tool changes.

Practical benefits for workshop productivity

Using an indexable insert with the WKK25G composition delivers an advantageous mix of wear resistance and toughness: the result is fewer insert changes and smoother machining cycles. The coated technology helps maintain a stable cutting edge under thermal and mechanical load, which supports consistent component tolerances and surface quality. In automated or lights-out operations, that predictability improves cycle time planning and reduces intervention frequency, contributing to a measurable improvement in overall equipment effectiveness.

Selection guidance and application notes

For best performance with cast iron, pair the insert with a suitable toolholder that provides rigid support and proper clearance for the triangular geometry. Use coolant or appropriate cutting conditions recommended for grey or nodular cast iron to optimise chip formation with the G27 breaker. The insert is supplied under the Walter Tools system; matching the insert code to toolholder specifications avoids incorrect seating and ensures the expected cutting performance. For tailored speeds and feeds, Metav Werkzeuge can provide cutting data adapted to the specific cast iron grade and machine dynamics.

For application-specific cutting data, supply options and ordering of the Tiger·tec Gold WKK25G grade, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss requirements and availability.

Technical data

• Article number: TNMU160512R-G27-WKK25G-WALTER
• Manufacturer: Walter Tools
• Product type: milling insert
• Series: Tiger·tec Gold
• Grade: WKK25G
• ISO designation: TNMU160512R-G27 WKK25G

Facts

• Geometry: triangle 60°
• Corner radius: 1.2 mm
• Free angle: 0° (negative)
• Size: 16
• Thickness code: 05
• Tolerance class: M

Special features

• Coated carbide, optimised for cast iron (K)
• Chipbreaker: G27
• Designed for abrasive wear conditions of cast iron
• Stable cutting edge for interrupted cuts
• Suitable for production and versatile machining tasks

FAQ

What materials is this insert intended for?
The WKK25G grade is formulated for machining cast iron; it is optimised for the abrasive nature and short-chip behaviour of cast materials.

How does the Tiger·tec Gold coating affect performance?
The Tiger·tec Gold coating on the WKK25G grade increases wear resistance and supports stable edge life under typical cast iron cutting conditions.

Is the insert suitable for interrupted cuts and roughing?
Yes, the triangle 60° geometry combined with a negative 0° rake and the G27 chipbreaker offers robust performance in interrupted cuts and roughing operations.

Which toolholder type is recommended for this insert?
A rigid, correctly sized seat for the TNMU series with proper clamping torque is recommended to ensure secure engagement and repeatable positioning.

Where can one obtain cutting data for specific cast iron grades?
Cutting parameters and feed recommendations can be provided by Metav Werkzeuge; they can match machine and workpiece characteristics to the WKK25G grade.

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

Walter AG (branded as Walter Tools) is part of the Sandvik Group and is recognised as a leading manufacturer of precision tools for metalworking, offering high process security, precise machining and reliable tool life. Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanatory purposes. There is no connection between our company and the mentioned brands. The offered article is original factory-new goods of the manufacturer.