Onsrud 64-018 Downcut Spiral Router Bit 3/16 in Solid Carbide

Product Description

The ONSRUD 64-018 is a downcut single-edge spiral router bit machined from solid carbide. It is designed for routing operations in aluminum, plastics, solid surfaces, and wood. The downcut flute geometry pushes chips toward the workpiece surface, reducing fraying and tearout on the top face of the material. With a 3/16-inch cutter diameter and a 21-degree helix angle, the bit suits detail work and narrow slot cutting where clean top-surface finish is required. Right-hand cutting direction and an uncoated finish make it a straightforward choice for high-RPM CNC and handheld routing applications. Installation and tool changes are handled by machinists and CNC operators working across woodworking, fabrication, and light metalworking shops.

This bit fits standard 1/4-inch collets and is well suited for CNC routers and router tables used in production and job-shop environments. Typical applications include slotting, profiling, and edge routing in sheet goods, aluminum plate, acrylic, and composite solid-surface materials. The 5/8-inch length of cut accommodates material thicknesses common in cabinetry panels and sign blanks. Its compact cutter diameter makes it appropriate for intricate cutouts and tight-radius routing paths.

Key Features

• Downcut flute type minimizes tearout and fraying on the top surface of the workpiece
• Solid carbide construction provides rigidity and wear resistance across aluminum, plastics, solid surfaces, and wood
• 21-degree helix angle balances chip evacuation and cutting edge engagement
• Single-edge router style allows aggressive feed rates relative to cutter diameter
• Right-hand cutting direction compatible with standard CNC spindle rotation
• Uncoated finish suitable for the full range of listed material applications without coating-compatibility concerns

Compatibility

Designed for use in 1/4-inch collet CNC routers and routing systems cutting aluminum, plastics, solid surfaces, and wood. Part of the ONSRUD 64-000 series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully powered down and the collet is fully released before inserting or removing the bit. Seat the shank fully into the collet and torque the collet nut according to the router or spindle manufacturer specifications. Verify RPM and feed rate settings match the material being cut before running the tool.