SNMA 120408 T5125 Wendeplatten - Tungaloy

Benefit from the CVD-coated T5125 grade and a 0.8 mm corner radius for greater resistance to chipping during interrupted turning. The ISO SNMA 120408 geometry and 12 mm size deliver a compact, rigid cutting edge for external and internal turning, especially in cast-iron applications. Order the SNMA120408 T5125 insert directly via Metav Werkzeuge or consult the technical advisors if needed.

SNMA 120408 T5125 SNMA turning insert by Tungaloy (CVD-coated carbide, 12 mm, 0.8 mm radius)

The SNMA120408 T5125 is an ISO-standard square indexable insert developed for precision external and internal turning; it is optimised for cast-iron machining and intermittent cuts.

• CVD-coated carbide grade T5125
• ISO SNMA 120408 square insert, 12 mm size
• 0.8 mm corner radius for robustness
• Suited for cast iron and interrupted cuts

Reliable cutting performance for interrupted turning

The insert delivers a balance between toughness and wear resistance thanks to the CVD-coated carbide T5125 grade. This composition provides improved resistance to thermal and mechanical loads commonly encountered during interrupted turning of cast iron, helping to reduce edge chipping and unplanned tool changes. The square geometry with a 90° included angle adds rigidity at the cutting zone, which stabilises the cutting process and supports consistent surface finish and dimensional control.

Practical geometry that eases setup and compatibility

Designed as an ISO SNMA 120408 type, the insert offers a compact 12 mm dimension and a thickness of 4.76 mm, with a cylindrical hole for secure clamping. The 0° relief angle and the 0.8 mm corner radius enhance edge strength while maintaining accessibility for fine turning passes. Compatibility with holders depends on form, relief, tolerance class, fastening method, size and thickness, so the cartridge-style system—insert, matching external holder or boring bar, shim/clamp set and replacement screws—ensures straightforward assembly and reproducible clamping.

Broad application scope and machining economy

The grade and design suit both external and internal turning operations where interrupted cuts or less-stable set-ups demand a tougher grade. The absence of an integrated chipbreaker in this variant provides flexibility: a suitable chip control solution can be selected according to workpiece material and process stability. Overall, the geometry and coating support longer service life and stable productivity, contributing to reduced tool-change downtime and predictable process behaviour in production environments.

For precise tool selection and to ensure optimal holder compatibility for the Tungaloy SNMA120408 T5125 insert, contact Metav Werkzeuge for technical advice or to request a customised recommendation based on the machining scenario. Email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 6850257
• Manufacturer SKU: TUN6850257
• SKU: 6850257-Tungaloy
• Model series: ISO-Drehwendeschneidplatten
• Application: Turning
• Shape: Square
• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Relief angle: 0°
• Included angle: 90°
• Hole: with hole (cylindrical)
• Coating: CVD
• Grade: T5125
• Material: Carbide
• Manufacturer: Tungaloy

Facts

• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Relief angle: 0°
• Included angle: 90°
• Hole style: cylindrical

Special features

• ISO SNMA 120408 geometry
• CVD-coated carbide substrate
• Suited for cast-iron machining
• No integrated chipbreaker
• Square insert for external and internal turning
• Compatible with standard clamping sets

FAQ

What materials is this insert intended for?
The SNMA120408 T5125 insert is specified for machining cast iron, with the tougher T5125 grade chosen for interrupted cuts and less-stable conditions.

Does the insert include a chipbreaker?
This variant is supplied without an integrated chipbreaker, allowing selection of a chip control solution that matches the workpiece and process stability.

Which holders are compatible with the SNMA120408 geometry?
Compatibility is determined by insert form, relief angle, tolerance class, fastening method, size and thickness; the SNMA120408 follows ISO standards for square turning inserts and fits matching ISO external holders or boring bars.

What does the 0.8 mm corner radius affect in practice?
A 0.8 mm corner radius increases edge strength and resistance to chipping during interrupted cuts, while still enabling acceptable surface finish for general turning tasks.

How does the CVD coating influence tool life?
The CVD coating enhances wear resistance at elevated temperatures and supports stable cutting performance, which can extend service intervals under typical cast-iron turning conditions.

Manufacturer/Responsible: Tungaloy-NTK Germany GmbH, Katzbergstraße 3a, 40764 Langenfeld - Protected trademarks and product names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanatory purposes. There is no affiliation between our company and the mentioned brands. The item offered is an original, brand-new product from the manufacturer.