Onsrud 63-718 Upcut Spiral Router Bit 3/16 in Solid Carbide

Product Description

The ONSRUD 63-718 is a single-edge upcut spiral router bit machined from solid carbide, designed for cutting hard plastics and engineered materials in CNC routing applications. It features a 3/16 inch (0.1875 inch) cutter diameter, a 5/8 inch length of cut, and a 1/4 inch shank diameter with a 1-3/8 inch shank length. The upcut flute geometry pulls chips upward and out of the cut, helping to keep the cut path clear and reducing heat buildup at the tool tip. The 21-degree helix angle and right-hand cutting direction are matched to the material properties of rigid thermoplastics and solid surface materials.

This bit is suited for CNC routing operations on acrylic, nylon, PVC, polycarbonate, and solid surfaces. It performs well in both production and prototyping environments where clean edge quality and accurate dimensional control are priorities. Typical applications include profiling, slotting, and through-cutting of plastic sheet goods and solid surface panels. The uncoated solid carbide construction is appropriate for non-ferrous and abrasive synthetic materials where a sharp, uncoated edge outperforms coated alternatives.

Key Features

• Solid carbide construction for rigidity and edge retention in hard plastics
• Single-edge upcut flute design promotes chip evacuation during through-cuts
• 21-degree helix angle tuned for hard thermoplastic materials
• Right-hand cutting direction, compatible with standard CNC router spindles
• Uncoated finish maintains a sharp cutting edge on non-ferrous materials
• 1/4 inch shank fits common CNC router collets without adapters

Compatibility

Designed for use with CNC routers equipped with a 1/4 inch collet. Material applications include acrylic, nylon, PVC, polycarbonate, and solid surfaces as specified by the manufacturer.

Installation Notes

Installation and tool changes should be performed by a qualified CNC operator or machinist with the spindle fully powered down and locked out. Ensure the collet and collet nut are clean and free of debris before seating the shank to the full depth. Follow the router or CNC machine manufacturer's guidelines for proper collet torque and runout tolerances. Confirm feed rate and spindle speed settings are appropriate for the workpiece material before beginning a cut.