P4840P-8R-E77 WN15 Wendeplatten - Walter Tools

Benefit from a combination of stable chip control, productive uncoated carbide performance, and a geometry designed for drilling and boring that supports uninterrupted machining. Order this insert directly via Metav Werkzeuge or consult the technical team for material-specific guidance.

P4840P-8R-E77 WN15 — Drill and boring indexable insert by Walter Tools, chipbreaker 8R‑E77

The P4840P-8R-E77 WN15 is an indexable insert for drilling and boring applications, offering a robust uncoated carbide grade and a dedicated chipbreaker for controlled chip formation in a wide range of machining tasks

• Uncoated carbide grade WN15
• Chipbreaker 8R‑E77 for controlled chips
• Designed for drilling and boring applications

Stable chip control for continuous production

The integrated chipbreaker 8R‑E77 provides reliable chip control, which reduces the risk of chip-related interruptions during drilling and reaming cycles. Controlled chips contribute directly to higher process reliability by preventing entanglement and minimising manual clearing. For shops running medium to long production batches, the result is fewer stoppages and a more predictable machining rhythm, which supports efficient utilisation of machine time and operator resources.

Versatile uncoated carbide grade for predictable wear

The WN15 grade is an uncoated carbide composition intended for general-purpose cutting where robustness and consistent wear behaviour are required. Uncoated grades are often preferred when thermal shock or adhesion to coatings could be problematic; they give straightforward regrinding options and predictable tool life under suitable cutting conditions. Check the product matrix for exact workpiece material suitability, as the grade is optimised for a broad material range but requires matching to the specific application for best results.

Geometry tailored to drilling and boring for better surface quality

The geometry of this insert is developed for stable positioning in drilling and boring toolholders, delivering reproducible cutting engagement and surface finish benefits over alternative geometries. A stable cutting edge, combined with the chipbreaker, helps to maintain consistent cutting loads and reduces vibration risk in long-reach or interrupted cuts. Where dimensional accuracy and repeatability are priorities, this insert supports reliable hole quality and tool-change consistency in production settings.

Contact Metav Werkzeuge for tailored application advice on the P4840P-8R-E77 WN15 insert and to confirm availability and compatibility with specific workpiece materials

Technical data

• Article number: P4840P-8R-E77-WN15-WALTER
• Label: Bohr-/Aufbohrwendeschneidplatte P4840P-8R-E77 WN15 Walter Tools
• Manufacturer: Walter Tools
• Grade: WN15
• Geometry / chipbreaker: 8R‑E77
• Series: Walter Schneidstoffsorte - Serie offen
• Designation: P4840P-8R-E77 WN15

Facts

• No numerical specifications provided in the source data

Special features

• Uncoated carbide grade (unbeschichtetes Hartmetall)
• Chipbreaker type 8R‑E77 for controlled chips
• Intended application: drilling and boring indexable insert
• Series: Walter Schneidstoffsorte - Serie offen
• Catalogue-dependent material specifications

FAQ

What materials is this insert suitable for?
Material suitability should be verified against the product matrix; the insert is supplied in the WN15 uncoated carbide grade and is intended for a broad range of workpiece materials when matched correctly.

How does the 8R‑E77 chipbreaker affect machining?
The 8R‑E77 chipbreaker promotes predictable chip formation and removal, which reduces downtime from chip obstruction and supports continuous machining during drilling and boring operations.

Can this insert be reground or resurfaced?
As an uncoated carbide insert, the insert can typically be reground where geometry and mounting allow; follow standard practice for indexable insert reconditioning and check compatibility with the toolholder.

Is the insert suitable for high-speed cutting?
The WN15 grade is designed for robust, general-purpose performance; confirm cutting parameters and machine capability before applying high-speed strategies to ensure safe and effective results.

Which toolholders are compatible with this designation?
Toolholder compatibility depends on the insert designation and seat type; use holders specified for the P4840P geometry and ensure correct clamping to maintain repeatability and cutting stability.

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 protected trade names are mentioned solely for explanatory purposes. There is no connection between our company and the named brands. The offered item is original, factory-new merchandise of the manufacturer Walter Tools.