Clean Top-Edge Downcut
The downcut spiral directs cutting pressure toward the workpiece to help reduce top-edge lifting in laminated and finished materials.


General-purpose solid-carbide downcut spiral router bit designed for clean top-edge CNC routing in solid wood, wood composites, laminated materials, and selected plastics. Its 5/8-inch cutting diameter, 2-1/8-inch cutting edge, 5/8-inch shank, and 4-inch overall length support heavier grooves, dados, profiles, and production routing work.
This production tool combines HW solid-carbide construction, two right-hand downcut spiral flutes, and a rigid 5/8-inch shank for controlled routing where top-surface edge quality matters.
Designed for compatible CNC routers using precision 5/8-inch collets or approved toolholding assemblies.
The Royce Ayr 2-Flute General-Purpose Downcut Spiral Router Bit R57-32238 is designed for CNC routing applications where a clean top edge is important. Its downcut spiral geometry directs cutting pressure toward the workpiece, helping reduce top-edge lifting during dados, grooves, profiles, and laminated-material routing.
The 0.6250-inch cutting diameter and 2.125-inch cutting edge support heavier and deeper routing work in solid wood, wood composites, laminated sheet goods, and selected plastics. The matching 0.625-inch shank provides a rigid machine interface for compatible CNC router toolholding systems.
This uncoated HW solid-carbide tool uses two flutes, right-hand rotation, and a 4.000-inch overall length. Correct collet condition, minimum practical projection, verified runout, suitable spindle speed, feed rate, depth-per-pass, workholding, and chip evacuation are essential for maintaining finish quality, dimensional control, and tool life.
Technical Specifications
The downcut spiral directs cutting pressure toward the workpiece to help reduce top-edge lifting in laminated and finished materials.
The 5/8-inch cutting diameter and matching shank provide a rigid configuration for compatible heavier-duty CNC routing work.
The long cutting edge supports deeper grooves, dados, profiles, and production routing passes when chip evacuation is controlled.
Confirm that the spindle and toolholder accept an exact 5/8-inch (15.88 mm) shank and provide sufficient clearance for the 4-inch overall length and required projection. Inspect and clean the collet, collet nut, and tool shank, minimize unsupported projection, verify runout, and confirm right-hand rotation before machining. Match RPM, feed rate, depth-per-pass, workholding, and chip evacuation to the selected material and machine conditions.
The Royce Ayr 2-Flute General-Purpose Downcut Spiral Router Bit R57-32238 provides a rigid HW solid-carbide solution for routing solid wood, wood composites, laminated materials, and selected plastics.
Its 5/8-inch diameter, 2-1/8-inch cutting edge, 5/8-inch shank, right-hand rotation, and 4-inch overall length support clean top-edge machining when correctly held and operated within suitable cutting parameters.