Clean Top-Surface Finish
The downcut geometry directs cutting pressure into the material to help reduce upper-edge lifting and surface tear-out.


Solid-carbide downcut spiral router bit designed for clean top-surface CNC routing in solid wood, wood composites, laminates, veneers, plywood, hardwoods, softwoods, and selected plastics. Its 1/4-inch cutting diameter, 1-inch cutting edge, 1/4-inch shank, and 2-1/2-inch overall length support nested parts, dadoes, grooves, pockets, profiles, and general routing.
This production tool combines solid-carbide construction, two downcut spiral flutes, and a precision 1/4-inch shank for routing applications where upper-edge quality and controlled cutting pressure are priorities.
Designed for compatible CNC routers and routing equipment using a precision 1/4-inch collet or approved toolholding assembly.
The Royce Ayr 2-Flute Downcut Spiral Router Bit R57-22214 is designed for CNC routing applications where the top face of the workpiece requires a clean, controlled finish. Its downcut geometry directs cutting pressure into the material, helping reduce upper-edge lifting and surface tear-out during routing.
The 1/4-inch cutting diameter, 1-inch cutting edge, matching 1/4-inch shank, and 2-1/2-inch overall length provide a practical format for cabinet shops, millwork operations, CNC departments, and panel-processing environments producing nested parts, dadoes, grooves, pockets, profiles, and general routed components.
The supplied source identifies solid-carbide construction and lists solid wood, wood composites, laminates, veneers, plywood, hardwoods, softwoods, and some plastics as compatible applications. Rotation, coating, RPM limit, and country of origin are not specified by the supplied source and should be verified before ordering, programming, or production use.
Technical Specifications
The downcut geometry directs cutting pressure into the material to help reduce upper-edge lifting and surface tear-out.
The 1/4-inch diameter, 1-inch cutting edge, and matching shank provide a practical format for common CNC routing operations.
The supplied data lists solid wood, composites, laminates, veneers, plywood, hardwoods, softwoods, and selected plastics.
Confirm that the spindle, collet, and toolholder accept an exact 1/4-inch (6.35 mm) shank and provide adequate clearance for the 2-1/2-inch overall length and required projection. Rotation, coating, RPM limit, and country of origin are not specified by the supplied source, so verify those details before ordering, programming, or installation. Inspect and clean the collet, minimize unsupported projection, verify runout, and match spindle speed, feed rate, cut depth, workholding, and dust or chip evacuation to the selected material.
The Royce Ayr 2-Flute Downcut Spiral Router Bit R57-22214 provides a solid-carbide solution for clean top-surface routing across compatible wood, composite, laminate, veneer, plywood, and selected plastic applications.
Its 1/4-inch cutting diameter, 1-inch cutting edge, matching shank, two-flute downcut geometry, and 2-1/2-inch overall length support practical CNC production when correctly held and operated.