Royce Ayr 2-Flute Downcut Spiral Router Bit 1/4 in (6.35 mm)
2-Flute Left-Hand Downcut
Spiral Router Bit
Solid-carbide left-hand downcut spiral router bit designed for CNC routing, mortising, dado cutting, groove cutting, pocketing, and clean top-edge machining. Its 1/4-inch cutting diameter, 1-inch cutting edge, 1/4-inch shank, and 2-1/2-inch overall length suit compatible left-hand spindle and toolholding systems.
Main Product Description
The Royce Ayr 2-Flute Left-Hand Downcut Spiral Router Bit R57-22215 is designed for clean top-edge cutting in production routing applications. Its downcut geometry directs cutting pressure into the workpiece, helping reduce top-side chipping when machining laminated panels, dados, grooves, pockets, mortises, and routed features where the visible face matters.
The 1/4-inch cutting diameter, 1-inch cutting edge, matching 1/4-inch shank, and 2-1/2-inch overall length provide a compact format for panel processing, mortising, groove routing, and controlled small-diameter CNC work. This SKU is specifically identified for left-hand rotation and must be matched to a compatible spindle and toolholder.
This solid-carbide tool uses two downcut spiral flutes and is listed for supported solid wood, wood composites, laminated material, 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 reliable performance.
Best Fit Applications
Product Highlights
Verified Left-Hand Rotation
This SKU is specifically identified for left-hand cutting direction and must be used only with a compatible left-hand spindle setup.
Clean Top-Edge Downcut
The downcut spiral directs cutting pressure into the workpiece to help reduce upper-edge chipping in laminated and wood-based materials.
Compact Production Format
The 1/4-inch diameter, 1-inch cutting edge, matching shank, and 2-1/2-inch overall length suit controlled small-diameter routing.
Compatibility & Installation Notes
Confirm the machine spindle rotation before ordering or running this tool. SKU R57-22215 is a left-hand rotation bit and is not interchangeable with a right-hand tool in a standard right-hand spindle setup. Verify that the collet or toolholder accepts an exact 1/4-inch (6.35 mm) shank and provides adequate clearance for the 2-1/2-inch overall length and required projection. 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.
Control Left-Hand Downcut Routing
The Royce Ayr 2-Flute Left-Hand Downcut Spiral Router Bit R57-22215 provides a solid-carbide solution for clean top-edge routing, mortising, dado cutting, groove cutting, and pocketing in compatible materials.
Its 1/4-inch cutting diameter, 1-inch cutting edge, matching shank, two-flute downcut geometry, left-hand rotation, and 2-1/2-inch overall length support controlled production machining when correctly matched to the spindle and toolholder.