Accupro 71177927 Spiral Upcut Router Bit 1/4 Inch Solid Carbide

Product Description

The ACCUPRO 71177927 is a solid carbide spiral upcut router bit designed for precision cutting in plastic materials and engineered composites. With a 0.25-inch cutter diameter, a 1.25-inch length of cut, and a 1/4-inch shank diameter, this single-edge bit delivers clean, efficient chip evacuation on every pass. The upcut flute geometry pulls chips up and out of the cut, reducing heat buildup and preventing material gumming. At 3 inches overall length and weighing just 0.07 pounds, it is well-suited for use in CNC routers and handheld router setups. The bright, uncoated solid carbide construction provides sharp cutting edges with no coating buildup to affect dimensional accuracy.

This bit is engineered for cutting a broad range of thermoplastics and engineered plastics, including ABS, acrylic, HDPE, HIPS, PE, PET, POM, PS, polycarbonate, polypropylene, solid surfaces, and UHMW. It is a practical choice for fabrication shops, sign makers, and industrial CNC operators working with sheet plastics or composite panels. The right-hand cutting direction and 21-degree helix angle are optimized to minimize melting and delamination in these materials.

Key Features

• Solid carbide construction for rigidity and edge retention in abrasive plastics
• Upcut single-edge flute design promotes chip evacuation and reduces heat in the cut zone
• 21-degree helix angle optimized for thermoplastic materials
• Bright uncoated finish maintains precise cutter diameter with no coating variance
• Right-hand cutting direction compatible with standard CNC and handheld router spindles
• Non-piloted design for use with fixtures, fences, or CNC toolpaths

Compatibility

Designed for use with routers and CNC machines accepting a 1/4-inch shank. Material applications include ABS, acrylic, HDPE, HIPS, PE, PET, POM, PS, polycarbonate, polypropylene, solid surfaces, and UHMW. Not designed for wood, metal, or composite materials containing abrasive fiber reinforcement.

Installation Notes

Install into a clean, properly sized collet and torque the collet nut to the router or spindle manufacturer specification before operation. Inspect the shank and collet for wear or debris before each use, as even minor runout will affect cut quality in plastics. Do not exceed the maximum RPM rating of the router or CNC spindle. Secure workpieces firmly to prevent vibration and ensure safe, consistent material removal.