TNMU11T304R-G27 WKK25G Wendeplatten - Walter Tools

Benefit from a robust combination of wear resistance, stable chip control and process security for reliable cast iron milling; order directly via Metav Werkzeuge or consult the sales team for application support.

TNMU11T304R-G27 WKK25G Fräswendeschneidplatte – indexable milling insert for cast iron, Tiger·tec Gold (Walter Tools)

The TNMU11T304R-G27 WKK25G is an indexable milling insert optimised for machining cast iron, delivering consistent chip control and long tool life in industrial milling applications

• Tiger·tec Gold coating for extended tool life
• Optimised for cast iron (ISO group K)
• Triangle 60° geometry, 11 mm size
• Chipbreaker G27 for short, controlled chips

Maximum process reliability through advanced coating and grade

The combination of Tiger·tec Gold coating and the WKK25G grade offers high resistance to abrasive wear typical in cast iron machining, which translates into fewer insert changes and more productive machining cycles. The coated carbide structure provides a consistent cutting edge, reducing flank wear and maintaining dimensional accuracy over longer runs. For production environments that prioritise uptime, this cutting grade improves the cost‑per‑component ratio by extending effective tool life.

Stable cutting geometry for predictable milling results

A triangle 60° form with a 0.4 mm corner radius and T3 thickness gives structural rigidity and repeatable cutting performance in interrupted or heavy cuts. The 0° (negative) rake promotes a robust cutting edge that resists chipping under shock and vibration, supporting stable feed rates and surface finish. These geometric attributes help to maintain tool stability when taking deeper passes or when machining complex cast components that produce fluctuating cutting forces.

Chip control and shop‑floor productivity

The integrated chipbreaker G27 is designed to produce short, easily evacuated chips when machining cast iron, lowering the risk of recutting and tool damage. Better chip formation reduces cycle interruptions and improves machine cleanliness, which in turn minimises non‑productive time. The insert’s design contributes to more predictable tool life and efficient setup changes, supporting higher overall equipment effectiveness and a faster return on tooling investments.

Material suitability and practical application guidance

This indexable insert is made for the ISO group K (cast iron); the grade adapts to the abrasive nature and tendency to form short, brittle chips in grey and nodular cast irons. For best results, use stable clamping and a rigid toolholder, select coolant strategy according to the casting type, and adjust feeds to match the desired chip thickness. The insert is particularly suited to roughing and medium finishing passes where process security and repeatability are priorities.

For high‑performance cast iron milling with Walter Tools’ Tiger·tec Gold technology, contact Metav Werkzeuge for product availability and tailored application advice.

Technical data

• SKU: TNMU11T304R-G27-WKK25G-WALTER
• Article designation: TNMU11T304R-G27 WKK25G
• Series: Tiger·tec Gold
• Grade: WKK25G

Core data

• Shape: Triangle 60°
• Size: 11 mm
• Thickness: T3
• Corner radius: 0.4 mm
• Free rake: 0° (negative)
• Chipbreaker: G27
• Tolerance class: M

Special features

• Coating: Tiger·tec Gold
• Coated carbide grade
• Suited for ISO group K (cast iron)
• Robust negative rake for stability
• Designed for short, breaking chips

FAQ

What materials is this insert intended for?
The TNMU11T304R-G27 WKK25G insert is intended primarily for cast iron machining (ISO group K), offering optimised wear resistance and chip control for grey and nodular cast irons.

How does the Tiger·tec Gold coating benefit production?
The Tiger·tec Gold coating on the WKK25G grade increases resistance to abrasive wear, extending tool life and reducing insert changes during production runs.

Which chipbreaker should be used for shorter chips in cast iron?
The G27 chipbreaker integrated in this insert promotes short, controlled chips suitable for cast iron, improving evacuation and reducing the risk of recutting.

What does the 0° (negative) rake mean for cutting performance?
A 0° (negative) rake produces a stronger cutting edge that withstands shock and vibration better than positive rake geometries, favouring stability in interrupted cuts or heavy milling.

Is the insert suitable for finishing as well as roughing?
This insert is optimised for roughing and medium finishing in cast iron; selection of feeds and depths of cut should be adapted to achieve the required surface finish.

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

Die Walter AG (brand appearance: Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and product names remain the property of their respective owners. Brand names and protected trademarks are mentioned for explanatory purposes only; there is no connection between our company and the mentioned brands. The offered article is an original, factory‑new product of the manufacturer.