P4840C-5R-E77 WNN15 Wendeplatten - Walter Tools

Benefit from the combination of coated carbide grade WNN15 and the 5R‑E77 chipbreaker for consistent chip control and process stability; this insert supports productive drilling and reaming cycles and is available through Metav Werkzeuge — contact the technical team for application advice or to place an order.

P4840C-5R-E77 WNN15 drilling/reaming indexable insert — coated carbide, chipbreaker 5R‑E77 — Walter Tools

The P4840C-5R-E77 WNN15 is a drilling and reaming indexable insert engineered to provide stable chip formation and extended tool life in general cutting tasks, offered in an open Walter grade series for flexible use.

• Coated carbide grade WNN15 for wear resistance
• Optimised chipbreaker 5R‑E77 for controlled chips
• Designed for drilling and reaming operations
• Open series for flexible application choices

Greater process stability through controlled chip formation

The insert’s chipbreaker 5R‑E77 is designed to shape and evacuate chips reliably during drilling and reaming, reducing the risk of clogging and tool vibration. Controlled chip flow directly improves cycle consistency and reduces downtime from chip-related issues. For machining processes where repeatability matters, the optimised chip geometry contributes to process reliability and a steadier feed, which in turn supports predictable component quality.

Coated carbide grade for extended tool life and economy

The WNN15 designation indicates a coated carbide cutting material tailored for broad application ranges. A coated substrate increases resistance to abrasion and thermal degradation compared with uncoated grades, which typically translates into longer edge life and fewer tool changes. In practical terms, this means more productive cutting time per tool and potentially lower tooling costs per part when the grade is matched correctly to the workpiece material.

Versatile use and improved surface results

Forged from the Walter open-series strategy, the insert supports flexible selection across different machining tasks. The combination of the indexable insert format and a robust coating offers advantages in repeatable seating, quick replacement, and maintenance of a stable cutting edge, which helps to achieve consistent surface quality. Where fine surface finish and dimensional stability are priorities, the insert’s geometry and grade work together to reduce rework and finishing cycles.

Selection guidance and integration into the machining process

Because the WNN15 grade is part of a broader Walter assortment, suitability for specific workpiece materials should be verified against the manufacturer’s product matrix. Terms such as “coated carbide” refer to a carbide substrate with a thin, engineered coating applied to improve wear resistance and thermal performance. When integrating this insert into tooling systems, verify the seat type and clamping method to ensure correct engagement and indexing; mismatched seats can impair performance regardless of insert grade.

Contact Metav Werkzeuge to discuss how the Walter Tools P4840C-5R-E77 WNN15 insert fits specific applications and to arrange a tooling recommendation tailored to production needs — eMail: info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: P4840C-5R-E77-WNN15-WALTER
• Name / designation: P4840C-5R-E77 WNN15
• Manufacturer: Walter Tools
• Product type: Drilling/reaming indexable insert
• Grade/series: WNN15 / Walter Schneidstoffsorte - Serie offen

Facts

• Chipbreaker: 5R‑E77
• ISO designation: P4840C-5R-E77 WNN15
• Material specification: Katalogabhängig

Special features

• Coated carbide cutting material
• Open series for flexible assortment options
• Designed for controlled chip formation
• Suitability: check product matrix for workpiece match

FAQ

What materials is this insert suited for?
The P4840C-5R-E77 WNN15 is a coated carbide insert; suitability for specific materials must be checked against the Walter Tools product matrix to select the optimal cutting parameters.

How does the 5R‑E77 chipbreaker improve drilling performance?
The 5R‑E77 chipbreaker shapes chips for reliable evacuation during drilling and reaming, which reduces the risk of clogging and vibration and supports consistent cycle times with the Walter Tools insert.

Can this insert be used for both drilling and reaming?
Yes, the insert is specified as a drilling/reaming indexable insert and its geometry supports both operations when mounted in compatible holders and used with appropriate feeds and speeds.

Is the WNN15 grade coated or uncoated?
WNN15 is specified as a coated carbide grade within the Walter Tools open series, designed to enhance wear resistance and thermal stability during cutting.

Manufacturer/Responsible: AB Sandvik Coromant, Mossvägen 10, 811 34 Sandviken, Sweden, support.coromant@sandvik.com

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are cited for explanation only. There is no affiliation between our company and the mentioned brands. The offered item is an original, factory-new product of the manufacturer.