TNMA160408-RK7 WKK10S Wendeplatten - Walter Tools

Take advantage of the high wear resistance of the Tiger·tec Silver grade together with the proven RK7 chipbreaker and triangle geometry for reliable cast-iron turning results; order the insert directly via Metav Werkzeuge or consult our specialists for application guidance.

TNMA160408-RK7 WKK10S — Indexable turning insert, Tiger·tec Silver, for cast iron (Walter Tools)

The TNMA160408-RK7 WKK10S is an indexable turning insert engineered for efficient machining of cast iron, combining a Tiger·tec Silver coated grade with a robust RK7 chipbreaker for stable, breakable chips.

• Tiger·tec Silver coated grade
• WKK10S grade for cast iron
• Triangle 60° geometry for versatile clamping
• 0.8 mm nose radius, negative 0° rake

Increase process reliability with a grade tuned for cast iron

The WKK10S grade, realised in the Tiger·tec Silver coating family, is formulated specifically for cast iron applications. Its coating and substrate balance hardness and toughness to resist abrasive wear typical of grey and ductile irons, which means longer tool life and fewer unplanned insert changes. The RK7 chipbreaker promotes consistent, short chips that reduce heat concentration at the cutting edge and improve surface finish, supporting more predictable cycle times and lower per-part costs.

Geometry and edge preparation that stabilise cutting forces

A triangle 60° insert delivers three effective cutting corners per indexable blade, while the 0.8 mm nose radius provides a good compromise between robustness and the ability to achieve acceptable surface quality. The insert’s negative 0° rake yields a strong cutting edge for interrupted cuts and heavy depths of cut often encountered in cast-iron turning. Together, these geometry choices contribute to process stability and help reduce vibration under varying cutting conditions.

Practical benefits for workshop productivity

Adopting this coated indexable insert supports higher productivity through extended edge life and predictable wear patterns. The combination of a wear-resistant coating and a chipformer optimised for brittle, abrasive chips means fewer tool changes and less machine downtime. The insert’s form factor and size code 16 allow use in a wide range of standard toolholders, simplifying inventory while maintaining machining efficiency.

Clear orientation for application and selection

This insert is categorised for the ISO group K, indicating suitability for Gusseisen (cast iron). As a coated carbide grade intended to manage abrasive wear and frequent chip breakage, it is a sound choice when prioritising reliability in batch production or finish-turning operations on cast components. For customers seeking alternatives, the Tiger·tec Silver family offers other sorts and coatings to fine-tune performance across different cast-iron alloys and process requirements.

Contact Metav Werkzeuge for tailored grade recommendations and fast supply of Walter Tools inserts via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• SKU: TNMA160408-RK7-WKK10S-WALTER
• Designation: TNMA160408-RK7 WKK10S
• Product type: Indexable turning insert
• Brand: Walter Tools
• Series: Tiger·tec Silver

Facts

• Insert size code: 16
• Corner radius: 0.8 mm
• Geometry: Triangle 60°
• Rake angle: 0° (negative)
• Thickness code: 04
• Chipbreaker: RK7
• Tolerance class: M

Special features

• Grade: WKK10S
• Coating technology: Tiger·tec Silver
• Suitable for: Cast iron (ISO group K)
• Engineered for abrasive wear and breakable chips
• Designed for stable chip formation and extended edge life

FAQ

Which materials is this insert designed for?
The TNMA160408-RK7 WKK10S insert is designed primarily for cast iron (ISO group K) and is optimised for the abrasive wear and short, breaking chips typical of these materials.

What advantages does the Tiger·tec Silver technology offer?
Tiger·tec Silver in the WKK10S grade provides a balanced coated carbide structure that improves wear resistance and tool life for cast-iron turning while maintaining sufficient toughness for stable cutting.

How does the RK7 chipbreaker affect machining?
The RK7 chipbreaker on this insert promotes short, controlled chips and reduces heat concentration at the cutting edge, which helps maintain surface quality and reduces the frequency of tool changes.

Is the insert suitable for interrupted cuts or heavy roughing?
With a negative 0° rake and a 0.8 mm nose radius, the insert offers a strong cutting edge suitable for interrupted cuts and robust roughing operations commonly required in cast-iron machining.

Can this insert be used in standard toolholders?
Yes; the triangle 60° geometry and size code 16 make the insert compatible with a wide range of common indexable turning toolholders designed for triangular inserts.

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

The Walter AG (brand: Walter Tools), headquartered in Tübingen, is a leading manufacturer of precision tools for metalworking and forms part of the Sandvik Group. Brand names and trademarks are the property of their respective owners and are mentioned here for explanation only; there is no affiliation implied between our company and the listed brands.