SCMT09T304-MK4 WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the WKK20S grade for abrasive cast-iron machining; the square 90° geometry with a 0.4 mm corner radius delivers reliable cutting performance and easy indexability. Order the SCMT09T304-MK4 WKK20S directly via Metav Werkzeuge or ask our consultants if needed.

SCMT09T304-MK4 WKK20S square 90° indexable insert — Walter Tools (Tiger·tec Silver, for cast iron)

SCMT09T304-MK4 WKK20S is an indexable cutting insert designed for machining cast iron; it combines a wear-resistant coating with a robust geometry for secure chip control.

Tiger·tec Silver coating for wear resistance
Optimised for cast iron machining
Square 90° geometry for robust indexability
0.4 mm corner radius for stable cutting

Consistent tool life through optimised coating and grade

The combination of the Tiger·tec Silver coating and the WKK20S carbide grade is engineered for cast iron applications, where abrasive wear and short, breaking chips are common. The coated cemented carbide resists abrasive attack and maintains edge integrity over longer tool cycles, which reduces downtime for tool changes and supports predictable production planning. For shops seeking stable performance in repetitive machining tasks, this insert offers a measured balance between wear resistance and toughness, improving process reliability during finishing and medium-depth turning or boring operations.

Geometry that supports rigidity and predictable chips

A square 90° plate form with a 7° relief angle and a 0.4 mm corner radius provides a sturdy cutting edge with good shock resistance. The MK4 chipbreaker is tailored to produce short, controlled chips in brittle materials, lowering the risk of entanglement and enhancing surface quality. The plate thickness T3 contributes to torsional stiffness in the toolholder, which helps maintain dimensional accuracy and repeatable results when indexing the insert. These geometrical choices translate into fewer interruptions for regripping or part rework and make the insert a practical choice where repeatability matters.

Practical guidance for application and process stability

Classified with tolerance grade M, the insert meets medium precision requirements relevant to many workshop and production environments. Its design suits both drilling/boring and turning indexable applications where cast iron is the principal workpiece material. In practice, pairing the insert with a suitably rigid toolholder and an appropriate coolant strategy will support stable chip formation and extend tool life. The insert’s specifications—such as the square geometry, chipbreaker type and corner radius—should be matched to the workpiece grade and the intended cutting parameters to achieve the best balance between productivity and component finish.

For reliable cast-iron machining with Walter Tools’ Tiger·tec Silver grade WKK20S, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 for ordering and technical advice.

Technical data

• Article number: SCMT09T304-MK4-WKK20S-WALTER
• Product designation: SCMT09T304-MK4 WKK20S
• Manufacturer: Walter Tools
• Product type: Indexable insert (drilling/boring and turning)

Facts

• Grade/Sort: WKK20S
• Coating series: Tiger·tec Silver
• Relief angle: 7°
• Corner radius: 0.4 mm
• Plate form: Square 90°
• Plate size: 09
• Chipbreaker: MK4
• Plate thickness: T3
• Tolerance class: M

Special features

• Suitable for: Cast iron (K)
• Coated cemented carbide
• Optimised for short, breaking chips
• Robust geometry for indexability

FAQ

Is this insert suitable for machining cast iron?
Yes. The SCMT09T304-MK4 WKK20S is specifically formulated for cast iron machining; the WKK20S grade and Tiger·tec Silver coating are tuned to resist abrasive wear and to produce short chips in grey and nodular cast irons.

What does the Tiger·tec Silver finish provide?
The Tiger·tec Silver coating increases surface hardness and wear resistance compared with uncoated grades, which helps the insert maintain cutting edge integrity in abrasive cast-iron conditions.

What are the key geometry features to consider?
The square 90° plate form, 7° relief angle and 0.4 mm corner radius give a stable cutting edge and improved shock resistance; the MK4 chipbreaker promotes controlled, short chip formation for safer chip disposal.

Can this insert be used for stainless steel or general steel?
The SCMT09T304-MK4 WKK20S is optimised for cast iron; no specification for stainless steel or general steel machining is provided for this grade, so selection should follow the manufacturer’s material recommendations.

What does tolerance class M indicate?
Tolerance class M denotes a medium dimensional tolerance suitable for standard production tasks where balanced accuracy and economy are required; it supports stable seating and repeatable indexing in suitable toolholders.

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

Protected trademarks and trade names remain the property of their respective owners. Brand names and protected designations are mentioned for explanatory purposes only. There is no connection between our company and the named brands. The offered article is original, factory-new goods of the manufacturer.