P2840S-4N-E77 WNN15 Wendeplatten - Walter Tools

Take advantage of the combination of coated carbide grade WNN15 and the 4N‑E77 chipbreaker for reliable chip control and productive drilling cycles; order the P2840S-4N-E77 WNN15 insert directly via Metav Werkzeuge or request application advice from the consultants.

P2840S-4N-E77 WNN15 indexable drill/reaming insert — Walter Tools

P2840S-4N-E77 WNN15 is an indexable insert for drilling and bore enlargement, engineered to deliver stable chip formation and consistent cutting performance in production environments

• Coated carbide grade WNN15
• Chipbreaker 4N‑E77 for stable chips
• Suitable for drilling and bore enlargement

Consistent chip control for uninterrupted production

The insert is designed around a clearly defined chipbreaker geometry (4N‑E77) that promotes predictable chip segmentation and evacuation. Predictable chips reduce the risk of chip entanglement and tool damage, which in turn helps to maintain cycle time and minimise unplanned downtime. The chipbreaker is particularly useful when running sequential drilling operations or enlarging bores where chip evacuation through the flute channel can be challenging. For machinists and production engineers, this means more stable process windows and fewer interruptions during high-volume runs.

Coated carbide grade for dependable tool life

The cutting grade WNN15 is a coated carbide formulation intended for general purpose use; the coating improves wear resistance and contributes to a longer tool life under typical drilling loads. Coated grades combine a hard substrate with a protective layer that reduces abrasive wear and helps maintain a sharp cutting edge. While the grade is optimised for a broad range of tasks, the material suitability must be verified against the product matrix to ensure the grade matches specific workpiece materials and hardness levels. This verification supports reproducible results and protects machining investments.

Easy integration and process guidance for CNC shops

The insert follows established indexable geometries and can be incorporated into existing drilling or reaming toolholders without extensive modification, simplifying tool setup. Clear designation and standardised geometry support faster tool changes and inventory management in tool rooms. Where process optimisation is required, selecting the correct insert grade and chipbreaker combination enables improvements in surface finish and reduces the frequency of regrinds or replacements. For precision or high-volume production, this stability contributes directly to predictable part quality and lower overall machining cost per hole.

Contact Metav Werkzeuge for application support and to arrange availability of the Walter Tools P2840S-4N-E77 WNN15 insert

Technical Data

• SKU: P2840S-4N-E77-WNN15-WALTER
• Article: Bohr-/Aufbohrwendeschneidplatte P2840S-4N-E77 WNN15
• Manufacturer: Walter Tools
• Series: Walter Schneidstoffsorte - Serie offen

Core specifications

• Chipbreaker: 4N‑E77
• Grade: WNN15 (coated carbide)
• Designation: P2840S-4N-E77 WNN15

Special features

• Material: Katalogabhängig
• Coating: Coated carbide (as per grade)
• Application note: Verify workpiece suitability in the product matrix

FAQ

What machining tasks is this insert intended for?
The P2840S-4N-E77 WNN15 insert is intended for drilling and bore enlargement tasks where controlled chip formation and reliable cutting performance are required.

Is the WNN15 grade suitable for stainless steel or pre-hardened steels?
The WNN15 grade is a coated carbide formulation; suitability for specific materials such as rostfreier Stahl or pre-hardened steels must be checked in the product matrix to confirm recommended cutting data and applicability.

How does the 4N‑E77 chipbreaker affect process stability?
The 4N‑E77 chipbreaker promotes segmented and controllable chips, improving evacuation and lowering the risk of chip-related interruptions, which enhances process stability in drilling sequences.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany, info@walter-tools.com

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