A studio product shot of the Freud 77-604 three-flute mortise compression spiral router bit, featuring a solid carbide body with a polished silver shank and a dark blue-black coated spiral cutting tip.
A technical diagram of a wood profile created by the Freud 77-604 bit, illustrating a 3/8-inch cutting width, a 1-inch deep mortise, a 3-inch overall bit length, and a 3/8-inch shank.
An informational graphic titled Materials, displaying 3D samples of veneered plywood, hardwoods, softwoods, composites, and melamine or laminate to indicate the compatible surfaces for this compression router bit.
An informational graphic titled Tools, showing a handheld router, a table-mounted router, and a CNC machine spindle to demonstrate the different equipment compatible with this mortise bit.
A studio product shot of the Freud 77-604 three-flute mortise compression spiral router bit, featuring a solid carbide body with a polished silver shank and a dark blue-black coated spiral cutting tip.
Freud Black Ice CNC Bits promotional how to video
A studio product shot of the Freud 77-604 three-flute mortise compression spiral router bit, featuring a solid carbide body with a polished silver shank and a dark blue-black coated spiral cutting tip.
A technical diagram of a wood profile created by the Freud 77-604 bit, illustrating a 3/8-inch cutting width, a 1-inch deep mortise, a 3-inch overall bit length, and a 3/8-inch shank.
An informational graphic titled Materials, displaying 3D samples of veneered plywood, hardwoods, softwoods, composites, and melamine or laminate to indicate the compatible surfaces for this compression router bit.
An informational graphic titled Tools, showing a handheld router, a table-mounted router, and a CNC machine spindle to demonstrate the different equipment compatible with this mortise bit.
A studio product shot of the Freud 77-604 three-flute mortise compression spiral router bit, featuring a solid carbide body with a polished silver shank and a dark blue-black coated spiral cutting tip.
Freud Black Ice CNC Bits promotional how to video
Freud

Freud Mortise Compression Router Bit 77-604 3/8 Inch Solid Carbide Spiral (3 Flute 24000 Max RPM Double Sided Melamine Plywood Cabinet Joinery)

Only 1 left
SKU: 77-604
$78.99 USD

Description

Freud precisely the best logo Logout

Industrial Three-Flute Black I.C.E. Mortise Tooling for Splinter-Free Double-Sided Laminates

The Freud 77-604 3/8-Inch Three-Flute Mortise Compression Spiral Router Bit delivers high-density machining accuracy for processing double-sided materials under 5/8-inch thickness. Engineered with a short 0.203-inch upcut length, this solid carbide cutter combines upward and downward shearing forces to compress structural fibers toward the core, preventing top and bottom edge chip-out at up to 24,000 RPM. The premium micro-grain TiCo high-density solid carbide core provides double the operating life of standard steel bits, while a proprietary non-stick Black I.C.E. industrial coating forms a critical thermal protective shield that accelerates chip evacuation and lowers localized friction temperatures. This heavy-duty production tool ensures clean tracking and a chatter-free finish across high-speed CNC machinery, table-mounted configurations, and portable handheld platforms.

Best Used For:

  • Double-Sided Melamine Milling: Grooving and dadoing delicate laminate panels without edge chipping or flaking on either finish face.
  • Cabinet Dado Fabrication: Routing shallow mortises and joints in high-grade veneered plywood sheet goods under 0.625 inches thick.
  • High-Feed CNC Nesting: Cutting through thin composite materials at rapid travel rates while maintaining premium edge quality.

Key Performance & Safety Features

  • Precision Mortising Design: Shortened upcut height ensures the downward flutes engage the surface immediately, preventing face splintering on thin stock.
  • Three-Flute Geometry: Triple cutter configuration increases cuts-per-minute, facilitating faster machinery feed speeds and smoother tracking.
  • Black I.C.E. Coating: Industrial Cooling Element surface limits mechanical heat build-up and blocks localized wood adhesive resin accumulation.
  • TiCo High-Density Carbide: Specialized tungsten micro-grain carbide structural core offers 2X the tool durability and wear resistance of untreated bits.
  • Triple Machine Adaptability: Micro-balanced balancing configuration operates safely in automated CNC centers, handheld setups, and heavy table units.

What's Included

  • (1) Freud 77-604 3/8" Three Flute Mortise Compression Spiral Bit

Technical Specifications

Specification Value
Brand Freud
Model Number 77-604
Bit Type Mortise Compression Spiral
Material Construction Premier Solid Carbide
Overall Diameter 0.375 in
Shank Diameter 0.375 in
Carbide Height 1 in
Upcut Length 0.203 in
Overall Length 3 in
Number of Cutters 3
Coating Type Black I.C.E.
Maximum Speed 24,000 RPM

Pro-Tip: To ensure absolute chip-out protection on both top and bottom material faces, verify your introductory plunge depth exceeds the 0.203-inch upcut section on the first pass. This ensures the opposing downward flutes actively engage the top surface sheet immediately, forcing waste fibers downward into the cut core instead of pulling them upward.