Fine 1/16-Inch O-Flute
The compact single-flute geometry provides a 1/16-inch cutting diameter and 1/4-inch cutting height for fine CNC routing in plastics and acrylic.


Amana Tool 51441-K is a solid-carbide, single-flute, up-cut spiral O-flute CNC router bit with a 1/16-inch diameter, 1/4-inch cutting height, 1/4-inch shank, 2-inch overall length and Spektra™ nACo® ceramic coating for clean routing in plastics, acrylics, solid-surface materials and wood.
A mirror-finished solid-carbide CNC tool designed to direct chips upward while producing clean, smooth cuts in acrylic, plastics, solid-surface materials and wood.
Amana Tool specifies this bit only for CNC machines and routers with automatic feeding. Match the 1/4-inch shank to a compatible collet and observe the exact product and family operating data.
Amana Tool 51441-K is the exact Tool No. shown on its dedicated official product page in the Solid Carbide Spektra™ Extreme Tool Life Coated Spiral O-Flute Plastic Cutting CNC Router Bits family. The official specification block confirms up-cut direction, 1/16-inch diameter, 1/4-inch cutting height, 1/4-inch shank, 2-inch overall length, one flute and nACo® ceramic coating.
The single O-flute geometry is manufactured from an exclusive solid-carbide grade, polished to a mirror finish and designed to eject chips upward. Amana Tool identifies super-clean, smooth cutting in acrylic materials, other plastics and wood, with right-hand helix and right-hand cut geometry.
The mirror-finished cutting edge is intended to promote chip evacuation, reduce chip re-welding, dissipate heat and help prevent melting. The Spektra™ nACo® nanocomposite coating is a micro-thin ceramic treatment designed to retain cutting-edge sharpness and lubricity while resisting heat and oxidation.
Technical Specifications
The compact single-flute geometry provides a 1/16-inch cutting diameter and 1/4-inch cutting height for fine CNC routing in plastics and acrylic.
The micro-thin nanocomposite ceramic coating is engineered to retain edge sharpness and lubricity while resisting heat and oxidation.
The polished right-hand up-cut geometry supports clean cutting, chip evacuation and reduced chip re-welding in industrial CNC applications.
Confirm exact Tool No. 51441-K, a compatible 1/4-inch CNC collet, adequate cutter clearance and guarding, secure workholding and automatic machine feeding. Observe the exact-page 35,000 RPM maximum, use the linked family chart only as an operating reference, and account for up-cut chip direction. For polycarbonate such as Lexan™, Amana Tool recommends the slowest suggested feed rates and the shortest practical bit. Follow Amana Tool and CNC machine-manufacturer safety documentation.
Amana Tool 51441-K combines a 1/16-inch solid-carbide cutting diameter, 1/4-inch cutting height, 1/4-inch shank, 2-inch overall length, single up-cut O-flute and 35,000 RPM maximum.
Its polished cutting edge and Spektra™ nACo® coating support clean CNC routing, chip evacuation, heat control and reduced chip re-welding across acrylic, plastics, sign materials, solid surface and wood.