WNMG100612-MK5 WKK20S MK5 Wendeplatten - Walter Tools

Take advantage of the combination of proven Tiger·tec Silver coating and a robust MK5 chipformer for reliable productivity when machining cast iron; order directly via Metav Werkzeuge or consult our technical team for process optimisation.

WNMG100612-MK5 WKK20S turning indexable insert for cast iron – Walter Tools

WNMG100612-MK5 WKK20S is a turning indexable insert engineered for efficient, repeatable machining of cast iron components in industrial turning operations.

• Tiger·tec Silver coated carbide
• Trigon 80° insert for stable cutting
• MK5 chipformer for short chips
• 1.2 mm corner radius for robust edge

Greater productivity through wear-resistant grade and coating

The combination of the WKK20S grade and the Tiger·tec Silver coating targets the abrasive wear and short, breaking chips typical of cast iron machining. This coating technology enhances lubricant retention and reduces flank wear, which translates into longer tool life and fewer indexings. For production environments where consistent cycle times matter, the coated carbide substrate provides a measurable improvement in process reliability and overall throughput. The specified chip control features are designed to maintain stable cutting forces, reducing the risk of unexpected tool changes and downtime.

Improved cutting stability from geometry and edge design

The Trigon 80° geometry and a 1.2 mm corner radius deliver a stiff cutting edge that resists chipping under interrupted cuts common in cast iron workpieces. The insert’s 0° negative rake (noted as 0° (negative)) contributes to a strong cutting edge and predictable engagement with the workpiece. In practice, a negative rake increases edge toughness at the expense of slightly higher cutting forces; this trade-off is deliberate for abrasive materials where edge integrity is paramount. Tolerance class M ensures consistent fit in standard toolholders, supporting repeatable positioning and high process security.

Practical advantages and machining guidance for reliable results

Built with an MK5 chipbreaker, the insert shapes chips into short, manageable segments, improving evacuation and reducing risk of entanglement in automated and manual lathes. The grade is specified for material group K (cast iron) according to ISO 513, ensuring the substrate and coating are matched to the wear mechanisms encountered. Integration into existing turning systems is straightforward: the insert fits standard WNMG pockets and benefits from established clamping systems. For best results, couple the insert with stable workholding, moderate cutting speeds appropriate for cast iron, and a coolant strategy aligned to shop practice to balance tool life and surface finish.

For technical advice on inserting this Walter Tools turning insert into an existing tool setup or to request tailored cutting parameter recommendations, contact Metav Werkzeuge for prompt support and application consulting.

Technical Data

• SKU: WNMG100612-MK5-WKK20S-WALTER
• Designation: WNMG100612-MK5 WKK20S
• Type: turning indexable insert
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Facts

• Shape: Trigon 80°
• Corner radius: 1.2 mm
• Thickness: 06
• Size: 10
• Free rake: 0° (negative)
• Tolerance class: M
• Chipformer: MK5

Special features

• Grade: WKK20S
• Coating: Tiger·tec Silver
• Material group suitability: K (cast iron)
• Optimised for abrasive wear and short, breaking chips
• Stable edge for interrupted cuts

FAQ

Which materials is this insert intended for?
The WNMG100612-MK5 WKK20S turning insert is optimised for cast iron (material group K according to ISO 513) and is specifically designed to handle the abrasive wear characteristics of such materials.

What benefits does the Tiger·tec Silver coating provide?
Tiger·tec Silver improves wear resistance and heat management, resulting in longer tool life and more consistent machining performance when the WKK20S grade is used on cast iron.

How does the MK5 chipformer affect machining?
The MK5 chipformer produces short, controlled chips that improve evacuation and reduce the likelihood of chip-related interruptions, supporting safer and more stable turning operations.

Is the insert compatible with standard WNMG toolholders?
Yes, the insert matches standard WNMG pockets and tolerance class M ensures consistent seating and repeatable positioning in widely used turning toolholders.

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

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