SPMT 120408 T505 Wendeplatten - Tungaloy

Take advantage of the combination of CVD-coated carbide grade T505 and a 0.8 mm corner radius for stable chip formation and cost-effective cast-iron turning; order directly via Metav Werkzeuge or ask the consultants for application-specific advice.

SPMT120408 T505 turning insert (ISO) — Tungaloy

A SPMT120408 T505 indexable turning insert engineered for economical and productive machining of cast iron in external and internal turning applications.

• CVD-coated carbide grade T505
• Optimised for economical cast-iron machining
• Square ISO 12 mm plate, 4.76 mm thickness
• 0.8 mm corner radius, 11° clearance angle

High-performance grade for economical cast-iron machining

The insert features a CVD-coated carbide substrate in grade T505, selected for its balance of wear resistance and edge stability when machining cast iron. This coating provides a hard, wear-resistant surface while the carbide body maintains toughness under load, resulting in longer tool life and consistent surface quality. For production environments where cycle times and tool costs are critical, the combination of coating and substrate delivers a favourable cost-per-part through extended durability and predictable wear patterns. The design supports both continuous and segmented cuts when the machine and clamping stability are adequate.

Secure ISO compatibility and robust clamping for repeatable seating

Compatibility with toolholders is governed by the insert's form, clearance angle, tolerance class, clamping method, size and thickness. This plate conforms to the ISO turning insert geometry and comes in a square form with a nominal size of 12 mm and a plate thickness of 4.76 mm, enabling straightforward replacement in standard ISO-compliant holders. The insert is supplied with a hole and a cylindrical hole plus single-sided countersink (40°–60°) which facilitates positive location and secure seating when used with the appropriate clamp set, shim and screw. Such secure fixation reduces vibration and runout, contributing directly to improved tool life and surface finish.

Reliable chip control and process benefits for productive turning

The one-sided chipbreaker geometry supports controlled chip formation for common cast-iron grades; the one-sided chipbreaker promotes breakage into short, manageable chips that clear the tool face, reducing re-cutting and heat concentration. The modest 0.8 mm corner radius gives a balance between edge strength and finish capability, while the 11° clearance angle reduces rubbing at the flank face to maintain cutting efficiency. In practice this leads to reproducible performance across batch runs and easier process set-up: fewer tool changes, improved uptime and predictable results. The insert is part of a system comprising the indexable plate, a matching external holder or boring bar, a shim/underplate and fastening hardware; choosing the correct chipbreaker and grade according to workpiece stability and interruption profile is recommended to maximise productivity.

For productive cast-iron turning with Tungaloy’s proven T505 grade, contact Metav Werkzeuge for technical advice or to place an order via info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 6831849
• Manufacturer SKU: TUN6831849
• SKU: 6831849-Tungaloy
• Model series: ISO turning indexable inserts
• Material: carbide

Facts

• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Corner radius: 0.8 mm
• Clearance angle: 11°
• Insert angle: 90°

Special features

• Grade: T505
• Coating: CVD-coated carbide
• Plate form: square
• Hole: with hole
• Hole style: cylindrical hole + single-sided countersink (40°–60°)
• Chipbreaker: one-sided
• Typical application: external and internal turning
• System components: insert, holder/boring bar, shim/underplate, clamp set and replacement screws
• Compatibility factors: form, clearance angle, tolerance class, clamping method, size, thickness

FAQ

What materials is this insert suitable for?
The SPMT120408 T505 insert is optimised for machining cast iron, using grade T505 for economical and reliable performance in most cast-iron applications.

Which holder features are required for secure mounting?
A standard ISO turning holder that matches the square 12 mm plate form, 4.76 mm thickness and accommodates the insert hole and countersink is required for correct seating and clamping.

How does the chipbreaker influence performance?
The one-sided chipbreaker on this plate promotes controlled chip formation for cast-iron machining, improving chip evacuation and reducing heat concentration at the cutting edge.

Is this insert suitable for intermittent cuts?
Intermittent cuts are feasible when the chosen grade and chipbreaker match the workpiece stability; the T505-grade insert can be used for interrupted cuts depending on machine and clamping rigidity.

Which dimensions are most relevant when replacing an insert?
When replacing an insert, check the plate form, nominal size (12 mm), thickness (4.76 mm), corner radius (0.8 mm) and clearance angle (11°) to ensure compatibility.

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.