Amana 51531 Solid Carbide CNC Spiral for Glass Reinforced Plastic Cutting 1/8 Dia x 1/2 x 1/4 Shank Down-Cut ZrN Coated Router Bit

Fiberglass-impregnated materials are well known for their abrasiveness along with a tendency to fray or shred during machining along with heat created by the router bit.
Amana Tool's response to these challenges is an extremely free-cutting, multi-edge Glass Reinforced Plastic (GRP) multi-flute tool that shears the material without shredding or imparting unnecessary heat.


Excellent for cutting:

Acrylonitrile-Butadiene-Styrene (ABS)
Carbon Fiber Reinforced Polymer (CFRP)
Composite Materials
Coroplast®
Fiberglass
Fiberglass PCB Board
Fiber Reinforced Plastic (FRP)


High Impact Polystyrene (HIPS)
Low Density Polyethylene (LDPE)
Poly (methyl methacrylate) (PMMA)
Polycarbonate (Lexan™)†
Polyethylene Terephthalate Glycol-Modified (PETG / PET-G)
Thermoplastic Polyolefin (TPO)




†Recommendation: Use the slowest suggested feed rates and the shortest bits necessary for cutting and routing Lexan™.
Benefits of ZrN Coating

Creates a harder and tougher cutting edge allows for a prolonged cutting edge life and helps to prevent the build-up of material in the flutes while cutting
High resistance to wear
Extended tool life
Less friction & heat buildup
High resistance to wear