Open O-Flute Chip Space
The open flute profile provides generous chip space for freer cutting and controlled chip formation in compatible soft and hard plastics.


Solid-carbide, right-hand, two-flute low-helix O-flute downcut router bit designed for routing soft and hard plastics. Its 1/4-inch cutting diameter, 3/4-inch cutting edge, 1/4-inch shank, and 2-1/2-inch overall length combine an open flute with controlled downcut action for clean chip formation.
A two-flute HW solid-carbide plastics-routing tool combining open O-flute chip space, low-helix downcut geometry, and right-hand rotation for compatible CNC routers.
Designed for compatible CNC routers using precision 1/4-inch collets or approved toolholding systems. Confirm plastic type, fixturing, chip evacuation, spindle direction, and cutting parameters before use.
The Royce Ayr Low-Helix O-Flute Downcut Router Bit R57-62302 is engineered for routing both soft and hard plastics. Its 0.2500-inch cutting diameter, 0.750-inch cutting edge, 0.250-inch shank, and 2.500-inch overall length provide a compact, rigid configuration for signmaking, display, clad-panel, and advanced-composite workflows.
Royce Ayr specifies an open-flute design to support freer cutting and good chip formation. The low-helix O-flute profile creates generous chip space for plastic machining, while the downcut direction applies axial force toward the work surface and can help control the top edge when fixturing and spoilboard clearance are correct.
The two-flute, right-hand tool is manufactured from HW solid carbide and carries no coating. Correct collet condition, minimum practical projection, runout control, extraction, feed rate, spindle speed, pass depth, and chip evacuation are essential for avoiding rubbing, melting, chip welding, or poor edge quality in thermoplastics and other compatible materials.
Technical Specifications
The open flute profile provides generous chip space for freer cutting and controlled chip formation in compatible soft and hard plastics.
Low-helix downcut geometry applies controlled downward axial force and can help manage the top edge when workholding and spoilboard clearance are correct.
The 1/4-inch cutting diameter and shank, 3/4-inch cutting edge, and 2-1/2-inch overall length provide a rigid, practical plastics-routing configuration.
Confirm SKU R57-62302, the exact 1/4-inch shank, 2-1/2-inch overall length, safe clamping length, right-hand spindle rotation, collet condition, tool projection, spoilboard clearance, and workholding before installation. Match spindle speed, feed rate, pass depth, extraction, and chip evacuation to the specific plastic or composite; rubbing and inadequate chip clearance can create heat, melting, rewelding, or poor finish.
The Royce Ayr Low-Helix O-Flute Downcut Router Bit R57-62302 provides a purpose-built solid-carbide solution for soft- and hard-plastic routing with a 1/4-inch diameter, 3/4-inch cutting edge, 1/4-inch shank, and 2-1/2-inch overall length.
Its two open O-flutes, low helix, and right-hand downcut action support freer cutting and controlled chip formation when the tool is correctly held and operated with suitable plastic-machining parameters.