Onsrud 63-761 Upcut Spiral Router Bit 0.125 in Solid Carbide

Product Description

The ONSRUD 63-761 is a solid carbide upcut spiral router bit designed for precision cutting in a wide range of plastic and synthetic materials. With a 0.125-inch cutting diameter and a 0.25-inch length of cut, this bit is built for detail work and tight-tolerance routing applications. The single-edge, right-hand upcut geometry pulls chips upward and away from the cut, keeping the work surface clean and reducing heat buildup. At 2 inches overall length with a 0.125-inch shank, it mounts directly into standard 1/8-inch collet systems. Solid carbide construction delivers the hardness and edge retention needed for production routing in plastics.

This bit is engineered for routing thermoplastics and engineered polymers including ABS, acetal, acrylic, HDPE, HIPS, PE, PET, polycarbonate, polypropylene, polystyrene, solid surfaces, and UHMW. It is well-suited for CNC router applications in sign-making, plastic fabrication, and light industrial production environments. The 21-degree helix angle is optimized for clean shearing cuts in these materials without melting or gumming the cutting edge. It is appropriate for both prototype runs and higher-volume production setups where chip evacuation and surface finish quality matter.

Key Features

• Solid carbide construction for superior hardness and edge retention in abrasive plastic materials
• Upcut spiral geometry evacuates chips upward, keeping the cut path clear and reducing heat
• 21-degree helix angle optimized for clean shearing cuts in thermoplastics and engineered polymers
• Single-edge design reduces cutting forces on thin or flexible workpieces
• Right-hand cutting direction compatible with standard CNC router spindle rotation
• Uncoated finish suitable for non-ferrous plastic applications where coating is not required

Compatibility

Designed for use with CNC routers and manual routing equipment fitted with a 1/8-inch collet. Rated for cutting ABS, acetal, acrylic, HDPE, HIPS, PE, PET, polycarbonate, polypropylene, polystyrene, solid surfaces, and UHMW. Part of the ONSRUD 63-750 series.

Installation Notes

Installation should be performed by a qualified CNC operator or machinist with the spindle fully powered down and the machine in a safe, locked-out state. Insert the shank fully into the collet and tighten to the router manufacturer's specified torque using the appropriate collet wrench. Verify runout with a dial indicator before production use. Do not exceed the tool's rated depth of cut per pass for the material being processed.