SPMT 120404 T505 Wendeplatten - Tungaloy

The combination of a CVD-coated carbide substrate and a precise 0.4 mm corner radius delivers economical, repeatable turning results on cast iron; the ISO format ensures straightforward integration into existing tool systems. For reliable supply and technical advice, order directly via Metav Werkzeuge or consult their application specialists.

SPMT 120404 T505 turning insert for Drehen — Tungaloy

SPMT120404 T505 is an ISO‑standard indexable insert designed for external and internal turning, optimised for economical machining of cast iron.

• ISO SPMT120404 format, square with 90° angle
• CVD-coated carbide grade T505 for cast iron
• 0.4 mm corner radius for accurate profiles
• Single-sided chipbreaker; hole with countersink

Improved productivity for cast-iron turning with CVD-coated grade

The SPMT120404 insert combines a CVD-coated hardmetal grade T505 with a geometry tailored for cast-iron applications, delivering stable cutting and consistent tool life. The CVD layer enhances wear resistance while the carbide core retains toughness, so the result is an improved cost-per-part ratio without sacrificing process reliability. This configuration supports higher material removal rates in stable setups and reduces downtime for insert changes, which benefits production-focused workshops.

Predictable fit and secure clamping across ISO systems

Designed to ISO dimensions, the square format with a nominal 90° profile and a clearance angle of 11° makes this insert compatible with a broad range of external holders and boring bars when form, tolerance class, fastening and thickness match. The 4.76 mm plate thickness and the central hole with a cylindrical bore plus one-sided countersink (40°–60°) ensure reproducible seating and torque transmission in clamping systems. Clear specifications reduce setup variation and simplify toolholder selection for mixed machine parks.

Better chip control and surface integrity for finished parts

The single-sided chipbreaker promotes predictable chip formation and evacuation when turning cast iron, lowering the risk of workpiece damage and helping to achieve consistent surface quality. The 0.4 mm corner radius supports accurate profile reproduction and provides a balance between edge strength and detail definition. These characteristics contribute to reduced rework and a more reliable production flow, especially on parts requiring tight dimensional tolerances.

Coating and substrate explained for informed tooling decisions

The insert uses a carbide substrate with a uniform CVD coating, a combination that separates abrasive wear resistance and bulk toughness into optimised layers. For users unfamiliar with coating technologies: the CVD (chemical vapour deposition) process produces a hard, wear‑resistant outer layer that is particularly effective on abrasive grey and nodular cast irons. The carbide core absorbs cutting shocks and preserves edge integrity during interrupted cuts, making the grade suitable for a wide range of stability conditions.

Practical application guidance for workshop selection

Choose this ISO indexable plate when turning cast iron components where a reliable balance between economy and performance is required. Match the insert to a suitable square holder or boring bar, check that the 90° nose and 11° clearance align with the intended tool geometry, and select cutting data according to machine rigidity and workholding. Where interrupted cuts or instability occur, opt for more conservative feed and depth settings to preserve edge life and part consistency.

For technical advice or to order Tungaloy SPMT120404 T505 inserts directly, please contact Metav Werkzeuge — info@metav-werkzeuge.com or call +49 2822 7131930 — the team can advise on holder compatibility and application parameters

Technical data

• Article number: 6831848
• SKU: 6831848-Tungaloy
• Manufacturer SKU: TUN6831848
• Manufacturer: Tungaloy

Core technical data

• Format: SPMT120404
• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Corner radius: 0.4 mm
• Clearance angle: 11°
• Insert angle: 90°
• Hole: with hole
• Hole style: cylindrical hole + one-sided countersink (40°–60°)

Special features

• CVD-coated carbide grade T505
• Single-sided chipbreaker
• ISO indexable turning insert series
• Square plate for external and internal turning
• Recommended for cast iron applications

FAQ

What materials is this insert intended for?
The insert is optimised for cast iron machining; the CVD-coated T505 grade provides wear resistance suited to grey and nodular cast irons while the carbide core handles intermittent cutting.

How does the insert secure in the toolholder?
Clamping relies on ISO dimensions: the 4.76 mm thickness, central hole and countersink ensure reproducible seating and torque transmission when matched to a compatible square holder or boring bar.

Is the corner radius suitable for finishing operations?
The 0.4 mm corner radius offers a compromise between edge strength and profile accuracy, making it suitable for fine profiles where a modest radius improves surface integrity without compromising detail.

Can this plate be used for internal turning as well as external turning?
Yes, the ISO geometry and square form allow use in appropriate boring bars for internal operations as long as holder geometry and clearance permit the required cutting angles.

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.