SPMT 120408 AH6235 Wendeplatten - Tungaloy

Robust chip control and resistance to chipping combine with ISO compatibility to deliver consistent turning performance; the PVD-coated carbide grade and square 90° geometry ensure productive machining and predictable tool life. Order the insert directly via Metav Werkzeuge or ask the consultants for application advice.

SPMT120408 AH6235 indexable turning insert, PVD-coated carbide — Tungaloy

The SPMT120408 AH6235 indexable turning insert is designed for heavy-duty and interrupted turning operations, offering reliable chip control and enhanced resistance to chipping in stainless-steel applications.

• PVD-coated carbide for improved wear resistance
• Robust grade for stainless steels and interrupted cuts
• Square 90° geometry for versatile external turning
• 0.8 mm corner radius for controlled chip formation

Stable turning performance for chipping-prone operations

The combination of a PVD-coated substrate and the AH6235 grade provides a tougher, more ductile microstructure that reduces edge breakouts during unstable cuts. This indexable insert is intended to maintain a stable cutting edge where interrupted cuts or work-hardening materials would otherwise shorten tool life. The carbide construction coupled with the coating improves wear behaviour and helps preserve surface integrity, which supports longer uninterrupted production runs and fewer tool changes.

ISO-compatible system design for reliable mounting

The insert follows the ISO indexable insert system and is compatible with holders that match form, relief angle, tolerance class, fastening method, size and thickness. The square 90° geometry and the specified 0.8 mm radius deliver predictable engagement in standard toolholders, while the with hole design and single-sided countersink enable secure clamping and repeatable position indexing. Understanding the holder interface reduces setup time and avoids misfits that can cause vibration or premature wear.

Fewer interruptions, better productivity

Using a grade optimised for stainless steels and applications with increased breakout risk reduces the incidence of unexpected failures and rework. The one-sided chipbreaker geometry channels chips away from the cutting zone, improving evacuation on both external and internal turning tasks. The result is smoother production cycles, less downtime for insert changes, and a steadier surface finish—factors that together improve process efficiency and lower total machining costs.

Grade and application guidance for selecting inserts

The AH6235 grade is a PVD-coated, tougher carbide formulation aimed at ductile, work-hardening materials and interrupted conditions. Selecting a chipbreaker and corner radius to match material and stability ensures optimal performance: the supplied 0.8 mm radius balances edge strength and finishing capability, while the square shape supports a range of external turning operations. For specialised applications or tight tolerances, consult Metav Werkzeuge for recommendations on cutting parameters and holder selection.

Contact Metav Werkzeuge today to discuss Tungaloy turning inserts and secure the SPMT120408 AH6235 for production; Metav Werkzeuge’s consultants can advise on holder compatibility, cutting data and optimum chip control strategies.

Technical data

• Article number: 6903485
• SKU: 6903485-Tungaloy
• Manufacturer SKU: TUN6903485
• Model series: ISO indexable turning inserts
• Material: Carbide
• Grade: AH6235

Dimensions

• Insert size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Clearance angle: 11°
• Insert angle: 90°
• Countersink angle: 40°–60°

Design and application

• PVD coating
• Carbide substrate
• Square shape
• With hole: cylindrical hole + single-sided countersink
• One-sided chipbreaker
• Application: turning
• Suited to stainless steels
• Suitable for interrupted cuts and high chipping risk

FAQ

What materials is this insert suitable for?
The SPMT120408 AH6235 insert is particularly suited to stainless steels and other ductile, work‑hardening materials where a tougher grade and PVD coating help prevent edge breakouts.

How is the insert secured in the holder?
This ISO-format insert uses a central cylindrical hole with a single-sided countersink (40°–60°) for secure clamping in compatible holders; correct holder match is essential for stable performance.

What does the AH6235 grade mean in practice?
AH6235 denotes a tougher, PVD-coated carbide grade optimised for interrupted cuts and applications with elevated chipping risk, offering improved edge security compared with harder, more brittle grades.

Is the 0.8 mm corner radius suitable for finishing work?
A 0.8 mm radius is a compromise between edge strength and surface finish; it provides enhanced resistance to chipping while still delivering acceptable surface quality in many turning applications.

Can this insert be used for internal and external turning?
Yes—due to its square 90° geometry and one-sided chipbreaker, the insert is appropriate for both external and internal turning when paired with the correct holder and cutting 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.