Diamond Flute Router Bits

Diamond flute router bits, also called diamond-cut router bits, are designed for routing abrasive laminate materials such as FR-4, G10, fiberglass, phenolic laminates, and PCB materials. They are a good choice when clean edges, reduced chipping, and controlled cutting are important.

For carbon fiber: Due to its extreme abrasiveness, diamond-coated routers are the recommended choice for longer tool life and reduced edge wear.

Diamond-Flute Routers explained — materials, tip styles, and when to use them →

Chip Breaker vs Diamond Flute Routers — when to use each →

Diamond-Cut Router Bits for Abrasive Materials

Diamond flute routers use a fine, multi-edge cutting pattern that is gentler on brittle and fracture-prone materials than more aggressive router geometries. They are commonly used for PCB routing, fiberglass laminate routing, composite work, and other applications where edge quality matters.

  • Best for: FR-4 PCB material, G10, fiberglass, phenolic laminates, abrasive composites, and similar brittle materials
  • Why choose it: Helps minimize chipping, delamination, and material fracture while maintaining edge durability
  • Common uses: PCB board outlines, slots, cutouts, laminate trimming, and composite routing
  • Tip options:
    • Fish Tail tips are often preferred for delicate entry into brittle materials
    • Drill Point tips are commonly used where repeated plunging or added tip strength is required

Use the filters below to narrow results by diameter, flute geometry, plunge tip type, and cut direction to find the exact router bit you need.

PCD Upgrade: For carbon fiber and the most abrasive composites, explore our PCD diamond-coated router lineup →

Looking for value-priced tooling? Browse our Value Tool Deals collection for lightly used routers, factory resharpened tools, and surplus carbide tooling offered at reduced prices.