LNHU090404R-L55T WKP25S Wendeplatten - Walter Tools

Benefit from the combination of long tool life and stable chip control offered by the Tiger·tec Silver WKP25S grade together with a negative 0° rake and 0.4 mm corner radius for reliable milling of steel and cast iron. Order the LNHU090404R-L55T WKP25S insert directly via Metav Werkzeuge or request application advice from our consultants.

LNHU090404R-L55T WKP25S — Milling indexable insert, Tiger·tec Silver, 0.4 mm radius (Walter Tools)

LNHU090404R-L55S WKP25S is a rectangular milling indexable insert designed for productive machining of steel and cast iron in demanding industrial applications

• Tiger·tec Silver coating for longer tool life
• Optimised for steel and cast iron machining
• Negative 0° rake for stable cutting forces
• 0.4 mm corner radius for controlled surface finish

High-performance coating and robust grade for consistent productivity

The Tiger·tec Silver coating paired with the WKP25S coated carbide grade delivers a balance of wear resistance and toughness specifically engineered for machining steel and cast iron. As a milling indexable insert with a rectangular form and a sturdy geometry, it helps maintain cutting-edge stability under variable cutting conditions. The coated substrate reduces abrasive wear and improves heat resistance, which in turn supports longer tool life and fewer tool changes during production runs. The result is a measurable increase in machine uptime and process reliability.

Predictable chip formation and surface quality thanks to geometry

Equipped with the chipbreaker L55T and a corner radius 0.4 mm, this insert promotes controlled chip formation and consistent surface finish. The negative 0° rake produces stable cutting forces, which is advantageous when machining interrupted cuts or heavier engagement depths. For users less familiar with insert geometry: a smaller corner radius concentrates cutting forces for robust material removal while still enabling acceptable surface finish; the chipbreaker channels and breaks chips to avoid entanglement and protect the component surface. These design elements combine to reduce rework and improve first-pass part quality.

Designed for process security in serial and jobbing work

With tolerance class H and a rectangular plate form, the insert supports repeatable clamping and positioning in modern milling holders, aiding precise batch-to-batch performance. The size and thickness codes correspond to standard toolholder systems, allowing straightforward integration into existing tool sets. Where stable repeatability and reduced downtime are priorities, the combination of coated carbide grade, negative geometry and optimised chip control contributes to predictable tool behaviour and consistent component finish—even across mixed-series production or varying workpiece alloys.

For precision milling in steel and cast iron, specify the Walter Tools Tiger·tec Silver insert LNHU090404R-L55T WKP25S and contact Metav Werkzeuge for tailored application guidance at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: LNHU090404R-L55T-WKP25S-WALTER
• Designation: LNHU090404R-L55T WKP25S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Core data

• Insert size: 09
• Plate thickness: 04
• Corner radius: 0.4 mm
• Free angle: 0° (negative)
• Tolerance class: H

Special features

• Coating: Tiger·tec Silver
• Grade: WKP25S
• Chipbreaker: L55T
• Applicable materials: steel (P), cast iron (K)
• Plate form: rectangular
• Geometry: negative rake

FAQ

What materials is this insert suitable for?
The LNHU090404R-L55T WKP25S insert is formulated for machining steel (P) and cast iron (K), reflecting the WKP25S grade’s balance between wear resistance and toughness.

What does the WKP25S designation indicate?
WKP25S identifies the Walter Tools carbide grade within the Tiger·tec Silver family, a coated carbide designed to combine abrasion resistance with reliable performance on steel and cast iron.

How does the 0.4 mm corner radius affect the finished part?
A 0.4 mm corner radius offers a compromise between robust cutting edge strength and surface finish quality; it supports stable material removal while delivering a controlled edge profile on the workpiece.

Why is a negative 0° rake used for this insert?
The negative 0° rake increases edge strength and supports stable cutting forces, which is particularly useful for interrupted cuts, heavy engagement or tougher workpiece conditions.

Which chipbreaker should be chosen for general-purpose milling?
The L55T chipbreaker integrated with this insert is tuned for effective chip control in steel and cast iron, reducing the risk of long, stringy chips and improving machining safety.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected designations are mentioned for explanation only. There is no connection between our company and the named brands. The offered article is an original factory-new product of Walter Tools.