Onsrud 52-574 Upcut Spiral Router Bit 3/8 in Solid Carbide

Product Description

The ONSRUD 52-574 is a solid carbide upcut spiral router bit engineered for precision cutting in foam materials. With a 0.375-inch cutter diameter and a 3.5-inch length of cut, this bit handles deep passes in soft foam substrates where clean wall finish and chip evacuation matter. The upcut flute geometry pulls chips upward and out of the cut, reducing heat buildup and keeping the workpiece clear of debris. The 25-degree helix angle balances aggressive material removal with stable cutting action. At 0.18 pounds, the bit is lightweight and suited for high-speed CNC router spindles.

This bit is designed for industrial and production environments where foam fabrication is a regular operation, including sign-making shops, packaging fabricators, and specialty CNC routing operations. The 3/8-inch shank diameter fits standard collets on most CNC routers and manual routing setups. The 5-inch overall length and 2.5-inch shank length provide clearance for fixturing in typical foam cutting applications. Right-hand cutting direction is standard for conventional CNC router configurations.

Key Features

• Solid carbide construction for extended tool life in foam cutting applications
• Upcut flute geometry promotes efficient chip evacuation and clean cut walls
• 25-degree helix angle balances cut stability with material removal rate
• Double-edge router style for smooth finish on foam substrates
• Uncoated finish - no coating buildup concerns when cutting foam or similar soft materials
• Right-hand cutting direction compatible with standard CNC router spindle rotation

Compatibility

Designed as an OEM-style production router bit from the ONSRUD 52-550 series, optimized for foam material applications on CNC routers equipped with a 3/8-inch collet.

Installation Notes

Installation should be performed by a qualified CNC machinist or tooling technician. Power down and lock out the router spindle before changing tooling. Insert the shank fully into the collet to the recommended engagement depth and torque the collet nut according to the router manufacturer specifications. Inspect the bit for chips or cracks before each use and replace any bit showing visible wear or damage.