TNMA 160408 T5125 Wendeplatten - Tungaloy

Take advantage of the combination of CVD-coated T5125 grade, robust cemented carbide construction, and ISO TNMA geometry for reliable performance in interrupted turning operations; order directly via Metav Werkzeuge or consult the specialists for holder compatibility.

TNMA 160408 T5125 triangular turning insert for interrupted cuts — Tungaloy

The TNMA160408 T5125 is an ISO‑standard triangular indexable insert designed for external and internal turning, optimised for cast iron machining under interrupted cuts and less stable set‑ups.

• ISO‑standard TNMA 160408 geometry
• CVD‑coated grade T5125
• Triangular 60° insert with 0.8 mm nose radius
• Cylindrical hole for secure clamping

Improved performance for interrupted turning in cast iron

The insert delivers dependable results where interrupted cuts and unstable workholding would otherwise shorten tool life. The CVD‑coated T5125 grade, applied to a cemented carbide substrate, is a tougher composition that resists chipping and fracture during involuntary impact events. This combination promotes stable chip formation and reduces the frequency of index changes, which in turn helps maintain throughput and reduces process downtime. For shops processing cast iron, the result is a more predictable machining cycle and fewer scrapped parts.

Precise fit and secure clamping for consistent machining

Designed to the ISO TNMA form, the insert’s triangular geometry and 60° included angle provide versatility across external and internal turning operations. The cylindrical hole and standard thickness of 4.76 mm ensure repeatable clamping in compatible holders; fit is governed by form, clearance angle, tolerance class, fastening style, size and thickness. The 0° relief angle and 0.8 mm nose radius allow straightforward cutting edge engagement and predictable tool paths while preserving dimensional stability on interrupted profiles.

Durable coating and material for lower overall costs

The CVD‑coating enhances edge life by providing thermal and abrasive resistance on the cutting face, while the cemented carbide body maintains mechanical strength. In practical terms, the insert extends usable edge life under demanding conditions and minimises unplanned tool changes. This yields a favourable cost‑per‑component ratio when compared with uncoated grades in similar applications. Where surface finish and repeatability matter, the combination of coating and substrate supports longer steady‑state runs and lower overall process variability.

Integration into the tooling system and application guidance

Use of the insert requires a compatible ISO external holder or boring bar together with an underlay/clamping set and replacement screws as part of the system. The insert is supplied with a cylindrical hole and no integrated chipbreaker, so selection of a matching chip control geometry and holder stability is essential for optimal chips and surface quality. For general turning tasks and intermittent cuts in cast iron, choose a holder and assembly that provide rigid support and correct rake/clearance orientation; adjusting feeds and speeds conservatively at first will verify stability before ramping up production rates.

For guidance on holder compatibility or to acquire the Tungaloy TNMA 160408 T5125 insert for robust interrupted‑cut turning, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 for tailored advice and fast availability.

Technical data

• Article number (manufacturer): 6850296
• SKU: 6850296-Tungaloy
• Manufacturer SKU: TUN6850296
• Designation: TNMA160408 T5125 Tungaloy indexable insert

Facts

• Nose radius: 0.8 mm
• Included angle: 60°
• Thickness: 4.76 mm
• Plate size: 16 mm
• Clearance angle: 0°

Special features

• Coating: CVD‑coated
• Material: cemented carbide
• Shape: triangular
• Hole: with cylindrical hole
• Chipbreaker: without
• Series: ISO turning indexable insert series
• Typical use: turning (external and internal), interrupted cuts

FAQ

What materials is this insert suited for?
The Tungaloy TNMA160408 T5125 insert is formulated for machining cast iron, with the T5125 grade chosen for tougher performance under interrupted cuts.

How does the TNMA form affect holder selection?
ISO TNMA geometry requires a compatible triangular insert seat and clamping system; ensure the holder matches the insert’s 16 mm size, 4.76 mm thickness and cylindrical hole style for secure retention.

Is there a chipbreaker on this insert?
This insert is supplied without a chipbreaker, so chip control depends on holder design and cutting parameters; select appropriate chip control solutions for efficient evacuation.

What benefits does the CVD coating provide?
The CVD‑coating on the T5125 grade improves thermal and abrasive resistance, extending edge life and improving performance in interrupted turning of cast iron.

Which spare parts are required for assembly?
A matching ISO holder or boring bar, an underlay/clamping set and the correct replacement screws complete the system required to mount this insert securely.

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.