P4840C-4R-E77 WN15 Wendeplatten - Walter Tools

Take advantage of the combination of a proven uncoated carbide grade and a precision 4R‑E77 chipbreaker for stable chip control and consistent drilling results; check the product matrix for workpiece suitability and order directly via Metav Werkzeuge or consult our specialists for application matching.

P4840C-4R-E77 WN15 drilling/reaming indexable insert — uncoated carbide, 4R‑E77 chipbreaker (Walter Tools)

The P4840C-4R-E77 WN15 is a drilling and reaming indexable insert designed for applications where predictable chip formation and reliable cutting behaviour are required

• Uncoated carbide grade WN15
• 4R‑E77 chipbreaker geometry
• For drilling and reaming applications

Consistent cutting and predictable chip control

The open-series Walter grade WN15 is an uncoated carbide composition engineered for stable cutting in indexable drilling and reaming operations. The 4R‑E77 chipbreaker is configured to promote controlled chip evacuation, reducing the risk of chip entanglement and enabling more consistent hole quality. For production environments this results in fewer interruptions and a steadier process window, because chip behaviour is a key factor in cycle-time stability and surface integrity.

Lower downtime through reliable performance

Designed as an indexable insert, this geometry supports fast replacement and repeatable seating in standard insert-style drilling heads, helping to reduce tool-change times. The material choice and chipbreaker combination aim to balance tool life and edge robustness, providing an economical option for batch production where predictable wear characteristics are valued. For customers assessing tooling strategies, the insert’s uncoated nature can be an advantage in specific machining contexts where coatings alter cutting temperatures or chip adhesion.

Compatibility guidance and application checklist

This insert belongs to Walter’s open series and carries the designation P4840C-4R-E77 WN15; compatibility with holders and the suitability for particular workpiece materials should be verified against the manufacturer product matrix. Where material or process requirements are not explicit in the dataset, refer to the Walter tooling documentation for matching holder interface and recommended cutting data. For specialised materials or high-speed scenarios, confirm whether this chipbreaker form and the uncoated grade meet the process demands before series deployment

Consult Metav Werkzeuge for application matching, availability and to secure the P4840C-4R-E77 WN15 from Walter Tools — eMail: info@metav-werkzeuge.com • Tel: +49 2822 7131930

Technical data

• SKU: P4840C-4R-E77-WN15-WALTER
• Designation: P4840C-4R-E77 WN15
• Product type: drilling/reaming indexable insert
• Grade series: Walter Schneidstoffsorte - Serie offen
• Chipbreaker: 4R‑E77
• Grade: WN15
• Manufacturer: Walter Tools

Facts

• No numerical specifications supplied in the dataset

Special features

• Uncoated carbide (WN15)
• Open series Walter grade
• Chipbreaker geometry 4R‑E77
• Intended for drilling and reaming applications
• Indexable insert format

FAQ

What materials is the WN15 grade suitable for?
The WN15 is an uncoated carbide grade; suitability for specific workpiece materials must be checked in the Walter product matrix and application sheets for the P4840C-4R-E77 WN15 insert.

Is the insert coated?
The P4840C-4R-E77 WN15 is supplied as an uncoated carbide insert (WN15), offering predictable cutting behaviour without additional coatings.

How does the 4R‑E77 chipbreaker affect machining?
The 4R‑E77 chipbreaker promotes controlled chip formation and evacuation, which supports consistent hole quality and reduces the likelihood of chip-related interruptions when using the P4840C-4R-E77 WN15.

Can the insert be used in standard indexable drill holders?
The insert is an indexable format intended for drilling and reaming systems; compatibility depends on holder type and seating geometry—refer to the tooling holder specifications and the P4840C-4R-E77 product designation.

Where to find cutting data and holder compatibility?
Cutting data and recommended holder matches for the P4840C-4R-E77 WN15 are provided in the Walter tooling documentation and the product matrix; consult these resources to determine optimal cutting parameters.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanatory purposes only and indicate no affiliation between our company and the mentioned brands. The article offered is an original, factory-new product of the manufacturer Walter Tools.