EPGT 040104 J740 Wendeplatten - Tungaloy

Take advantage of the combination of an industry-proven Tungaloy J740 grade and a compact 0.4 mm nose radius to achieve reliable surface quality and consistent tool life in turning operations; order directly via Metav Werkzeuge or consult their specialists for application support.

EPGT040104 J740 Tungaloy indexable insert — ISO turning insert with 0.4 mm radius and 11° clearance

The EPGT040104 J740 Tungaloy indexable insert is an ISO-standard rhombic insert for external and internal turning, offering a balanced mix of wear resistance and edge stability for a wide range of applications.

• EPGT 040104 ISO rhombic insert
• J740 Tungaloy carbide grade for turning
• 0.4 mm nose radius for fine finishing
• Single-sided chipbreaker, hole with countersink

Faster throughput through an optimised grade and geometry

The combination of the J740 cutting grade and cemented carbide substrate is engineered for productive turning where a balance of wear resistance and toughness is required. The material selection reduces flank wear under varied cutting conditions, which in turn extends interval lengths between indexings and tool changes. As a result, cycle times are shortened and machine utilisation improves. The tested composition of the grade supports both roughing and finishing applications when paired with a suitable holder and cutting data adjusted to component geometry.

Reliable fit and repeatable accuracy with ISO compatibility

Compatibility with clamping systems is determined by form, clearance angle, tolerance class, fastening, size and thickness. The rhombic shape with a 75° cutting orientation and 11° clearance ensures predictable seating in ISO holders; the insert thickness of 1.59 mm and the cylindrical hole with a one-sided countersink (40°–60°) provide secure clamping and repeatable assembly. For shops standardising on ISO tooling, this insert eases tool inventory management and reduces setup variability, thereby improving process reliability and dimensional consistency on turned components.

Controlled chip formation and surface finish improvements

The single-sided chipbreaker and the small 0.4 mm nose radius are designed to influence chip flow and minimise vibration on light to medium cuts, producing a finer surface finish with reduced burr formation. When an appropriate chipbreaker and grade are chosen for the workpiece material and the machine’s rigidity, chip control improves and post-process cleaning is reduced. For internal turning and confined geometries, the compact nose radius helps preserve profile accuracy while still delivering good edge life under stable cutting conditions.

Practical system advice for efficient integration

This insert belongs to a system comprising the ISO insert, a matching outside holder or boring bar, a backing shim/clamp set and replacement screws. Selection of a holder with the correct geometry and rigidity is essential to exploit the J740 grade’s benefits; where stability is limited, reduce cutting depth or choose a more robust geometry. The EPGT040104 is intended for general turning operations — selecting the chipbreaker and insert grade to match workpiece material and cutting mode will yield the best balance of economy and performance. The insert’s design supports process standardisation across small-batch and serial production alike.

For tailored application advice and immediate availability, contact Metav Werkzeuge for guidance on the Tungaloy J740 insert and to secure the EPGT040104 via info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 6821733
• SKU: 6821733-Tungaloy
• Manufacturer SKU: TUN6821733
• Brand: Tungaloy
• Designation: EPGT040104

Facts

• Radius: 0.4 mm
• Clearance angle: 11°
• Insert size: 04
• Thickness: 1.59 mm
• Cutting orientation: 75°

Special features

• Material: Cemented carbide
• Grade: J740 (Tungaloy)
• Plate form: Rhombic
• Chipbreaker: Single-sided
• Hole: Cylindrical hole + one-sided countersink (40°–60°)
• Application: External and internal turning
• System components: Insert, holder/bohrstange, backing shim/clamp set, replacement screws
• Compatibility criteria: Form, clearance angle, tolerance class, fastening, size, thickness

FAQ

What materials can this insert machine effectively?
The Tungaloy J740 EPGT040104 insert is designed as a general-purpose turning grade; it performs well on a wide range of steels and common engineering materials when cutting data and chipbreaker are matched to the workpiece and operation.

Is the insert compatible with standard ISO holders?
Yes, the insert follows ISO specifications for rhombic turning inserts; compatibility depends on the holder’s form, clearance angle and tolerance class, as well as size and thickness matching.

What is the benefit of the 0.4 mm nose radius?
A 0.4 mm nose radius provides improved surface finish and profile fidelity on light to medium cuts while maintaining acceptable edge strength for general turning tasks.

How does the J740 grade influence productivity?
The J740 grade offers a balanced mix of wear resistance and toughness, which extends tool life under mixed cutting conditions and contributes to fewer indexings and longer productive runs.

Which chipbreaker should be chosen for roughing vs finishing?
For the EPGT040104, choose a more aggressive chipbreaker and higher feed for roughing; for finishing, a finer chipbreaker combined with the small nose radius will yield better surface quality.

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.