Onsrud 52-261 Upcut Spiral Router Bit 3/16 in Solid Carbide

Product Description

The ONSRUD 52-261 is a solid carbide upcut spiral router bit designed for precise material removal in CNC and handheld routing applications. With a 3/16 inch (0.1875 inch) cutter diameter and a 30-degree helix angle, this right-hand cutting bit pulls chips upward and away from the workpiece, reducing heat buildup and improving cut quality. The double-edge geometry delivers clean, consistent results in production environments. It weighs 0.05 pounds and is part of the ONSRUD 52-200 series, built for shops and service technicians who need reliable, repeatable cutting performance in demanding material applications.

The 52-261 is suited for routing natural wood, plastics, solid surfaces, and wood composites. It is a common choice for cabinet shops, sign makers, solid-surface fabricators, and CNC operators working with sheet goods or dimensional stock. The 3/4 inch length of cut handles standard-depth passes, while the 1/4 inch shank fits the majority of CNC router collets and handheld router bases used in trade and light industrial settings. The uncoated solid carbide construction is well matched to abrasive synthetic and composite materials where coated tools may underperform.

Key Features

• Upcut flute geometry pulls chips away from the cut, reducing recutting and heat
• Solid carbide construction for durability in wood, plastics, solid surfaces, and wood composites
• 30-degree helix angle promotes smooth chip evacuation and consistent finish quality
• Double-edge (2-flute) design balances cutting speed with surface finish
• Right-hand cutting direction compatible with standard CNC and handheld router spindle rotation
• Uncoated finish - no coating buildup to manage when re-sharpening

Compatibility

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

Installation Notes

Installation is performed by a CNC operator or experienced woodworking technician. Ensure the router spindle is fully powered down and locked out before changing bits. Insert the shank fully into the collet to the recommended engagement depth - do not bottom out the shank against the collet seat. Verify runout and collet condition before operation, as worn collets accelerate tool wear on solid carbide bits.