Mining tool with asymmetric cutting insert

EP4528068C0Active Publication Date: 2026-05-27SANDVIK MINING & CONSTR TOOLS AB
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
SANDVIK MINING & CONSTR TOOLS AB
Filing Date
2023-09-25
Publication Date
2026-05-27

AI Technical Summary

Technical Problem

Existing cemented carbide inserts in percussive drill bits face issues with anti-taper, leading to reduced drilling efficiency and shortened lifespan due to wear, and increasing the risk of insert breakage when attempting to prevent anti-taper through increased protrusion height.

Method used

Asymmetrically shaped gauge inserts with a higher volume of material on the radially external side, maintaining sufficient space for cutting removal and reducing the risk of premature fracture, combined with a specific cemented carbide composition and surface hardening treatment to enhance wear resistance and toughness.

Benefits of technology

The asymmetric design delays anti-taper occurrence, maintains drilling efficiency, and extends the drill bit's service life by reducing steel contact and insert breakage, while ensuring adequate cutting removal space.

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