LNMU090404R-L55T WKP25S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the WKP25S grade for stable chip formation and extended service life in steel and cast iron machining; order directly via Metav Werkzeuge or request individual cutting data from our consultants.

LNMU090404R-L55T WKP25S — Rectangular milling insert with Tiger·tec Silver for steel and cast iron | Walter Tools

The LNMU090404R-L55T WKP25S is a rectangular milling insert engineered for productive machining of steel and cast iron, combining a Tiger·tec Silver coated carbide grade with an optimised chipbreaker for controlled chip flow.

• Tiger·tec Silver coating for long tool life
• Optimised chipbreaker L55T for controlled chips
• Rectangular negative‑rake insert, 0° free angle
• Suitable for steel and cast iron machining

Consistent productivity through advanced coating and grade

The Tiger·tec Silver series and WKP25S grade provide a balanced combination of wear resistance and thermal stability that supports continuous machining cycles. Designed as a coated carbide cutting edge, the insert improves process reliability under typical steel and cast iron cutting conditions (ISO groups P and K). This technical layering reduces flank wear and maintains cutting performance across batch production, leading to fewer tool changes and a steadier output. The result is dependable repeatability and a measurable contribution to machine uptime.

Reliable chip control for smoother process flow

Equipped with the L55T chipbreaker and a 0.4 mm corner radius, the insert ensures predictable chip formation and stable cutting forces. The 0° negative rake geometry increases edge strength for interrupted cuts and heavy engagement, while the chipbreaker channels material away from the cutting zone to prevent entanglement. These characteristics translate into improved surface quality and reduced cycle interruptions, and support safer handling during index changes. The combination of geometry and chip control is particularly beneficial for operations requiring consistent surface finish and minimal rework.

Easy integration and robust handling in machining setups

With a compact size 09 rectangular format and a plate thickness 04, the insert fits standard holders that accept this geometry and offers a tolerance class M for predictable mounting accuracy. The insert’s execution and design focus on stable clamping and repeatable positioning, which simplifies tool change procedures and helps maintain concentricity in multi‑edge tools. For workshops aiming to streamline tooling logistics, the indexable format and series compatibility of Tiger·tec Silver enable straightforward stocking and consistent performance across similar operations.

Contact Metav Werkzeuge today for tailored cutting data, application advice and a personalised recommendation for Walter Tools Tiger·tec Silver inserts, and request a quotation or technical sheet.

Technical data

• Article number: LNMU090404R-L55T-WKP25S-WALTER
• Name: Fräswendeschneidplatte LNMU090404R-L55T WKP25S
• Manufacturer: Walter Tools

Core specifications

• Plate size: 09
• Thickness: 04
• Corner radius: 0.4 mm
• Free angle: 0° (negative)
• Tolerance class: M
• Chipbreaker: L55T

Special features

• Coating/series: Tiger·tec Silver
• Grade: WKP25S (coated carbide)
• Application: Steel (ISO P) and cast iron (ISO K)
• Shape: Rectangular
• Execution: U

FAQ

What materials can this insert machine effectively?
The LNMU090404R-L55T WKP25S insert from Walter Tools is designed for machining steel (ISO P) and cast iron (ISO K), offering tailored wear behaviour for both groups.

How does the Tiger·tec Silver coating benefit cutting performance?
The Tiger·tec Silver coating on the WKP25S grade enhances heat resistance and reduces abrasive wear, which helps the insert maintain cutting edge integrity during continuous machining.

What is the purpose of the L55T chipbreaker?
The L55T chipbreaker on this rectangular insert promotes controlled chip formation and evacuation, lowering the risk of chip build‑up and improving surface finish consistency.

Is the 0° negative rake suitable for heavy cuts?
Yes, the 0° negative rake geometry increases edge strength, making the insert robust for interrupted cuts and heavier engagements while maintaining stability.

Which feature ensures repeatable seating and positioning?
The tolerance class M and the rectangular format with standardised dimensions support consistent seating and repeatable positioning in appropriate toolholders.

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

Brand names and protected trademarks are the property of their respective owners. Brand names such as Walter Tools are mentioned for identification and explanatory purposes only. There is no affiliation between our company and the named brands. The offered article is an original, factory‑new product of the manufacturer.