Royce Ayr 2-Flute Downcut Spiral Router Bit — 3/8 in (9.53 mm)
2-Flute Downcut Spiral
Router Bit
HW solid-carbide right-hand downcut spiral router bit designed for clean top-edge CNC routing in solid wood, wood composites, laminated materials, hardwoods, softwoods, composites, and selected plastics. Its 3/8-inch cutting diameter, 1-1/4-inch cutting edge, matching 3/8-inch shank, and 3-inch overall length support dados, grooves, pockets, profiles, and panel machining where visible-surface quality matters.
Main Product Description
The Royce Ayr 2-Flute Downcut Spiral Router Bit R57-32225 is designed for clean top-edge cutting in cabinetmaking, millwork, fixture production, and panel-processing environments. Its downcut geometry directs cutting pressure toward the workpiece, helping support the upper surface and reduce top-side breakout during dados, grooves, pockets, profiles, and laminated-panel machining.
The 0.3750-inch cutting diameter and 1.250-inch cutting edge provide useful reach for common CNC routing operations. The matching 0.375-inch shank and 3.000-inch overall length suit compatible CNC router collets and toolholders while maintaining a practical format for controlled production use.
This uncoated HW solid-carbide tool uses two downcut spiral flutes and right-hand rotation. It is listed for solid wood, wood composites, laminated material, hardwoods, softwoods, composites, and selected plastics. Correct collet condition, minimum practical projection, verified runout, suitable RPM, feed rate, depth-per-pass, workholding, and dust or chip evacuation are essential for maintaining finish quality and reliable tool life.
Best Fit Applications
Product Highlights
Downcut Top-Edge Control
The downcut spiral directs cutting pressure toward the workpiece to help reduce upper-surface breakout in laminated and composite panels.
1-1/4-Inch Cutting Reach
The verified cutting-edge length supports controlled dados, grooves, pockets, profiles, and common production-routing operations.
Verified RH Carbide Format
HW construction, two flutes, right-hand rotation, no coating, and a matching 3/8-inch shank define the supplied configuration.
Compatibility & Installation Notes
Confirm that the spindle, collet, and toolholder accept an exact 3/8-inch (9.53 mm) shank, support right-hand rotation, and provide adequate clearance for the 3-inch overall length and required projection. Verify the programmed cutting depth against the 1-1/4-inch cutting edge. Inspect and clean the collet, minimize unsupported projection, verify runout, and match spindle speed, feed rate, cut depth, workholding, guarding, and dust or chip evacuation to the selected material.
Improve Clean Top-Edge Routing
The Royce Ayr 2-Flute Downcut Spiral Router Bit R57-32225 provides an uncoated HW solid-carbide solution for clean routing in solid wood, wood composites, laminated materials, hardwoods, softwoods, composites, and selected plastics.
Its 3/8-inch cutting diameter, 1-1/4-inch cutting edge, matching shank, two-flute downcut geometry, right-hand rotation, and 3-inch overall length support controlled production machining when correctly held and operated.