SDMT1204AZN-D57 WKP25S Wendeplatten - Walter Tools

Combining the Tiger‑tec Silver coating with the WKP25S carbide grade delivers reliable chip control and extended tool life for steel and cast iron milling; the square 90° geometry and 15° clearance ensure stable cutting and consistent surface quality. Order directly via Metav Werkzeuge or ask our consultants for application advice.

SDMT1204AZN-D57 WKP25S milling insert – Tiger‑tec Silver for steel and cast iron (Walter Tools)

A SDMT1204AZN-D57 WKP25S indexable milling insert engineered for efficient medium-duty milling of steel and cast iron, featuring a square 90° form and specialised chip control

• Tiger‑tec Silver coated performance
• Optimised for steel and cast iron
• Square 90° geometry for stability
• Chipbreaker D57 for controlled swarf

Consistent productivity through proven coating and grade

The combination of the Tiger‑tec Silver technology and the WKP25S cutting grade provides a high level of wear resistance and stable chip formation, which translates into longer tool life and fewer interruptions on the shop floor. Coated carbide substrates balance toughness and hardness to manage the thermal and mechanical loads typical for ISO group P (steel) and K (cast iron). For production environments seeking predictable results, this insert reduces the need for excessive feed adjustments and supports continuous operation.

Geometry and clearance that improve stability and surface quality

The insert’s square 90° shape, paired with a 15° clearance angle, gives a robust cutting edge and predictable engagement in shoulder and face milling operations. The moderate clearance helps avoid rubbing while maintaining edge strength, so chatter is minimised and surface finishes remain consistent. Tolerance class M and the specified insert size 12 mm with thickness 04 contribute to repeatable tool positioning and interchangeable performance across compatible toolholders.

Chip control and application scope for fewer reworks

Equipped with chipbreaker D57, this grade is designed to produce short, breakable swarf on interrupted cuts typical for cast components and heavier sections of steel. The chip geometry supports efficient evacuation and reduces heat concentration at the cutting edge, lowering flank wear and preserving the cutting profile. Classified for ISO P and K materials, the insert is suitable for a broad range of steels and cast irons in jobbing and small-batch production while keeping setup complexity low.

Practical benefits for process reliability and planning

Integrating this insert into milling programmes enables predictable tool-change intervals and simplified tool inventory: the WKP25S grade offers broad applicability across common machining tasks, helping planners consolidate grades and streamline procurement. The robustness of the square geometry reduces toolholder sensitivity, allowing stable feeds and cutting speeds that favour both cycle-time reduction and surface conformity. For workshops aiming to balance economy and quality, the insert supports a reliable baseline for machining strategies.

Contact Metav Werkzeuge for availability and tailored milling recommendations — call +49 2822 7131930 or email info@metav-werkzeuge.com

Technical Data

• Article number: SDMT1204AZN-D57-WKP25S-WALTER
• Designation: SDMT1204AZN-D57 WKP25S
• Type: Milling insert
• Manufacturer: Walter Tools

Core specifications

• Clearance angle: 15°
• Insert size: 12 mm
• Thickness: 04
• Shape: Square 90°
• Tolerance class: M
• Chipbreaker: D57

Materials & special features

• Substrate/coating technology: Tiger‑tec Silver
• Cutting grade: WKP25S (coated carbide)
• Suitable for: Steel (P) and Cast iron (K)
• Series: Tiger‑tec Silver
• Execution: T

FAQ

What materials are best machined with this insert?
The SDMT1204AZN-D57 WKP25S insert is optimised for steel (ISO group P) and cast iron (ISO group K), reflecting the design focus of the Tiger‑tec Silver grade.

How does the chipbreaker D57 affect machining?
The D57 chipbreaker produces short, controllable swarf on interrupted and stable cuts, improving evacuation and reducing heat concentration on the cutting edge.

Is this insert suitable for finish milling or only roughing?
With its square 90° geometry and WKP25S grade, the insert is suited to medium-duty finishing and semi-finishing where stability and consistent surface quality are required.

Which toolholders are compatible with a 12 mm insert size?
Toolholders specified for the SDMT family and compatible seatings for 12 mm square inserts are appropriate; confirm holder seat dimensions and clamp method for proper fit.

How does the Tiger‑tec Silver technology benefit life and performance?
Tiger‑tec Silver coating enhances wear resistance and supports stable chip formation, which together extend service life and maintain cutting edge integrity under typical steel and cast iron workloads.

Manufacturer: Walter Tools; Walter AG, Tübingen, Germany