Composite Plastic

Fiberglass-reinforced plastic (FRP), carbon fiber composites, and G10/FR4 laminate are abrasive enough to wear a standard bit fast — the glass or carbon fiber itself acts almost like sandpaper against the cutting edge, which is...

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V-Bit
Onsrud 63-000 Series Solid Carbide Upcut Spiral Router Bit – Single Flute
Onsrud 63-000 Series Solid Carbide Upcut Spiral Router Bit – Single Flute
From
$44.55

LMT Onsrud

LMT Onsrud 52-000 Series – Solid Carbide Upcut Spiral for Plastics, Aluminum & Fiberglass
LMT Onsrud 52-000 Series – Solid Carbide Upcut Spiral for Plastics, Aluminum & Fiberglass
From
$40.20

LMT Onsrud

Onsrud 56-000 Series Solid Carbide Straight Router Bit
Onsrud 56-000 Series Solid Carbide Straight Router Bit
From
$36.37

LMT Onsrud

Onsrud 67-200 Series Solid Carbide Phenolic Cutter Router Bit, UPCUT
Onsrud 67-200 Series Solid Carbide Phenolic Cutter Router Bit, UPCUT
From
$125.81

LMT Onsrud

Amana Tool - 51404-K Solid Carbide CNC Spektra™ Extreme Tool Life Coated Spiral 'O' Flute, Plastic Cutting
Amana Tool - 51404-K Solid Carbide CNC Spektra™ Extreme Tool Life Coated Spiral 'O' Flute, Plastic Cutting
$91.43

Amana Tool

Onsrud 67-300 Series Solid Carbide Compression Spiral Router Bit
Onsrud 67-300 Series Solid Carbide Compression Spiral Router Bit
$154.68

LMT Onsrud

Onsrud 56-000P Series Solid Carbide, 2 Flute, Straight V Flute Router Bit
Onsrud 56-000P Series Solid Carbide, 2 Flute, Straight V Flute Router Bit
From
$35.31

LMT Onsrud

Onsrud 67-250 Series Solid Carbide Fiberglass CNC Router Bit
Onsrud 67-250 Series Solid Carbide Fiberglass CNC Router Bit
From
$239.26

LMT Onsrud

Onsrud 67-200 Series Solid Carbide Phenolic Cutter Router Bit, DOWNCUT
Onsrud 67-200 Series Solid Carbide Phenolic Cutter Router Bit, DOWNCUT
From
$224.40

LMT Onsrud

Amana Tool - 51405-K Solid Carbide CNC Spektra Extreme Tool Life Coated Sprial 'O' Flute
Amana Tool - 51405-K Solid Carbide CNC Spektra Extreme Tool Life Coated Sprial 'O' Flute
$106.17

Amana Tool

Amana Tool 46092 Solid Carbide Up-Cut Spiral 3/16 Dia x 5/8 x 1/4 Shank x 2-1/2 Inch Composite, Fiberglass & Phenolic Cutting ZrN Coated Router Bit
Amana Tool 46092 Solid Carbide Up-Cut Spiral 3/16 Dia x 5/8 x 1/4 Shank x 2-1/2 Inch Composite, Fiberglass & Phenolic Cutting ZrN Coated Router Bit
$71.89

Amana Tool

Onsrud 67-500 Series Solid Carbide CG Router Bit (Carbon Graphite)
Onsrud 67-500 Series Solid Carbide CG Router Bit (Carbon Graphite)
From
$145.66

LMT Onsrud

Onsrud 67-400 Series Solid Carbide Un-Ruffer CNC Router Bit
Onsrud 67-400 Series Solid Carbide Un-Ruffer CNC Router Bit
From
$55.23

LMT Onsrud

Onsrud 86-100 Series Diamond Film Coated Solid Carbide Parabolic Drill CNC Router Bit
Onsrud 86-100 Series Diamond Film Coated Solid Carbide Parabolic Drill CNC Router Bit
From
$229.48

LMT Onsrud

Fiberglass-reinforced plastic (FRP), carbon fiber composites, and G10/FR4 laminate are abrasive enough to wear a standard bit fast — the glass or carbon fiber itself acts almost like sandpaper against the cutting edge, which is the main reason these materials need dedicated tooling rather than a general-purpose plastic bit.

Solid carbide construction holds up to that abrasion better than coated alternatives, with geometry aimed at clean cuts without delamination — composite panels separate into layers under the wrong cutting approach, which a standard wood or plastic bit doesn't account for.

Common in aerospace, marine, and industrial fabrication where composite panels are structural, not just decorative.