Onsrud 63-720 Upcut Spiral Router Bit 0.2188 in Solid Carbide

Product Description

The ONSRUD 63-720 is a single-edge upcut spiral router bit machined from solid carbide, designed for clean through-cuts in hard plastics and engineered materials. It carries a 0.2188-inch cutter diameter, a 0.75-inch length of cut, and a 1/4-inch shank diameter, with an overall length of 2.5 inches. The 21-degree helix angle promotes efficient chip evacuation by pulling material upward and out of the cut, reducing heat buildup and extending tool life. Right-hand cutting direction suits standard spindle rotation on CNC routers and handheld router platforms. The uncoated solid carbide construction delivers the edge retention needed for abrasive thermoplastic materials without added coating thickness.

The 63-720 is rated for hard material applications including acrylic, nylon, PVC, polycarbonate, and solid surfaces. It fits residential shop, commercial fabrication, and sign-making environments where clean edge quality matters. Typical install scenarios include CNC router tables running nested-based cabinet components, plastic fabrication shops cutting sheet goods, and solid surface countertop shops performing profile and trim operations. The 1.75-inch shank length provides adequate grip depth in standard collet assemblies.

Key Features

• Solid carbide construction for edge retention in abrasive hard plastics
• 21-degree upcut helix pulls chips away from the workpiece surface
• Single-edge design reduces cutting forces and heat in gummy thermoplastics
• Right-hand cutting direction matches standard CNC and handheld router spindle rotation
• Uncoated finish maintains precise cutter diameter tolerance
• 1/4-inch shank fits a wide range of collet sizes without a reducer

Compatibility

Rated for use in acrylic, nylon, PVC, polycarbonate, and solid surface materials. Part of the ONSRUD 63-700 series. Fits any router or CNC spindle with a 1/4-inch collet.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the spindle powered down and locked out before bit changes. Seat the shank fully into the collet to the recommended engagement depth before torquing the collet nut. Verify feed rate and spindle RPM against the material manufacturer guidelines before running production cuts, as incorrect parameters accelerate tool wear and can crack brittle plastics. Eye protection and appropriate dust collection are required when routing any plastic material.