Onsrud 52-250 Upcut Spiral Router Bit 0.1563 in Solid Carbide

Product Description

The ONSRUD 52-250 is a solid carbide upcut spiral router bit designed for precise, clean cutting in wood, plastics, solid surfaces, and wood composites. The upcut flute geometry pulls chips up and out of the cut, reducing heat buildup and keeping the work path clear. With a 0.1563-inch cutter diameter, a 0.625-inch length of cut, and a 30-degree helix angle, this bit delivers controlled material removal in narrow slot and profile operations. The double-edge design provides balanced cutting action across a range of feed rates. It is sized for a 1/4-inch shank and is part of the ONSRUD 52-200 series.

This bit is suited for CNC routing and hand-held router applications where a small-diameter, high-precision cut is required. Typical applications include slotting, profiling, and plunge cutting in natural wood, MDF, plywood, acrylic, PVC, and solid surface materials. The compact 0.1563-inch diameter makes it well suited for fine detail work, narrow channels, and intricate pattern routing in both production shop and custom fabrication environments. The 2-inch overall length provides enough clearance for most standard router collet setups with a 1/4-inch chuck.

Key Features

• Solid carbide construction for extended tool life and heat resistance
• Upcut flute geometry evacuates chips efficiently, reducing recutting and heat
• 30-degree helix angle for smooth cutting action across multiple materials
• Double-edge (2-flute) design balances cutting forces at the tip
• Uncoated finish - no coating buildup to affect tight-tolerance cuts
• Right-hand cutting direction, compatible with standard router spindle rotation

Compatibility

Designed for use with 1/4-inch collet routers and CNC spindles. Rated for natural wood, plastics, solid surfaces, and wood composites per manufacturer material application data. Part of the ONSRUD 52-200 series.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Always power down and lock out the router or spindle before changing bits. Insert the shank fully into the collet and tighten to the router or spindle manufacturer's specified torque range - do not exceed maximum shank engagement depth. Verify spindle speed and feed rate are appropriate for the material and bit diameter before running the cut.