Angled view of the Freud 75-104 5/16 inch up spiral solid carbide router bit featuring a sharp spiral cutting edge and a silver 1/2 inch shank with laser-etched model information.
Vertical profile of the Freud 75-104 up spiral router bit showing the solid carbide construction and the high-precision spiral flute designed for rapid chip evacuation.
Technical profile diagram for the Freud 75-104 showing a 5/16 inch diameter, 1 inch carbide height, and 3 inch overall length next to an illustration of a deep mortise cut.
Material compatibility chart for the Freud 75-104 router bit indicating it is optimized for use with veneered plywood, hardwoods, softwoods, and composite materials.
Equipment compatibility graphic showing that the Freud 75-104 up spiral solid carbide bit is designed for use with hand routers, table routers, and CNC machines.
3D isometric view of a wood block featuring a clean, precise 5/16 inch wide deep groove or mortise cut created by the Freud 75-104 up spiral bit.
Application diagram showing the upward shearing action of the Freud 75-104 spiral bit which pulls chips upward to provide a better finish on the bottom surface of the material.
Angled view of the Freud 75-104 5/16 inch up spiral solid carbide router bit featuring a sharp spiral cutting edge and a silver 1/2 inch shank with laser-etched model information.
Action shot of the Freud 75-104 up spiral solid carbide router bit installed in a CNC machine actively performing high-production woodworking cuts with visible dust evacuation.
Why Freud promotional video
Angled view of the Freud 75-104 5/16 inch up spiral solid carbide router bit featuring a sharp spiral cutting edge and a silver 1/2 inch shank with laser-etched model information.
Vertical profile of the Freud 75-104 up spiral router bit showing the solid carbide construction and the high-precision spiral flute designed for rapid chip evacuation.
Technical profile diagram for the Freud 75-104 showing a 5/16 inch diameter, 1 inch carbide height, and 3 inch overall length next to an illustration of a deep mortise cut.
Material compatibility chart for the Freud 75-104 router bit indicating it is optimized for use with veneered plywood, hardwoods, softwoods, and composite materials.
Equipment compatibility graphic showing that the Freud 75-104 up spiral solid carbide bit is designed for use with hand routers, table routers, and CNC machines.
3D isometric view of a wood block featuring a clean, precise 5/16 inch wide deep groove or mortise cut created by the Freud 75-104 up spiral bit.
Application diagram showing the upward shearing action of the Freud 75-104 spiral bit which pulls chips upward to provide a better finish on the bottom surface of the material.
Angled view of the Freud 75-104 5/16 inch up spiral solid carbide router bit featuring a sharp spiral cutting edge and a silver 1/2 inch shank with laser-etched model information.
Action shot of the Freud 75-104 up spiral solid carbide router bit installed in a CNC machine actively performing high-production woodworking cuts with visible dust evacuation.
Why Freud promotional video
Freud

Freud Up Spiral Router Bit 75-104 1/2 Inch Shank Solid Carbide Cutter (5/16 Diameter 1 Cutting Length Max 24000 RPM Plywood CNC Mortising Wood)

In stock
SKU: 75-104
$45.99 USD

Description

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Freud 75-104 5/16" Solid Carbide Up-Spiral Router Bit (1/2" Shank)

The Freud 75-104 5/16-inch solid carbide up-spiral router bit evacuates chips upward out of deep mortises, blind slots, and through-cuts across dense hardwoods, softwoods, plywood, and composite sheet goods. Engineered from solid micrograin carbide with continuous upward-flute helices, this high-production routing accessory delivers clean shearing action up to a maximum rotational speed of 24,000 RPM while pulling heat and packed sawdust away from the cutting margins. Outfitted with an optimized geometry that leaves a crisp, splinter-free finish along the bottom surface of the workpiece, a rigid 1/2-inch shank that eliminates rotational chatter under heavy feed rates, and precision end-relieved plunging tips, it equips commercial CNC machinists, architectural millworkers, and custom cabinetmakers with mirror-smooth mortising throughput across automated flat-table CNC machinery, stationary router tables, and heavy-duty hand-held plunge bases.

Best Used For:

  • Deep Blind Mortising and Hardware Recesses: Clearing waste chips upward and out of deep lock mortises, tenon pockets, and architectural hardware slots in solid hardwoods without bit packing or burning.
  • High-Speed Production CNC Grooving: Milling continuous 5/16-inch dados, blind cable grooves, and perimeter cutouts on automated CNC flat-table routers with uninterrupted chip extraction.
  • Through-Cut Part Nesting and Sizing: Slicing cleanly through multi-layer cabinet-grade plywood, solid timber slabs, and MDF panels where a pristine bottom-face edge is required.

Key Performance & Safety Features

  • Continuous Up-Spiral Flute Geometry: Helical flute design pulls waste chips and abrasive timber dust upward, preventing heat buildup and maintaining cool cutting action in deep cavities.
  • Superior Underside Cut Quality: Upward shearing motion draws wood fibers against the core, producing an ultra-clean, burr-free bottom edge that reduces manual sanding.
  • 100% Solid Micrograin Carbide: Constructed entirely from premium-grade solid carbide for maximum cutting edge retention, exceptional rigidity, and extended service life.
  • Heavy-Duty 1/2" Drive Shank: Large-diameter solid steel-reinforced shank minimizes rotational deflection, eliminates tool deflection, and provides maximum collet gripping power.
  • Vibration-Free Multi-Platform Balance: Precision-balanced body rated up to 24,000 RPM ensures chatter-free operation in CNC spindles, table routers, and hand-held plunge tools.
  • Precision Plunge Routing Ability: Specially relieved end-cutting tips permit smooth vertical plunge entries for internal mortises and pocket cutouts without core scorching.

What's Included

  • (1) Freud 75-104 5/16 In. Solid Carbide Up-Spiral Router Bit with 1/2 In. Shank

Technical Specifications

Manufacturer Brand Freud Tools Inc.
Model Part Number 75-104
Product Tool Classification Solid Carbide Up-Spiral Router Bit
Overall Cutting Diameter 0.3125 Inches (5/16 in. / 7.94 mm)
Carbide Cutting Height 1.000 Inches (1 in. / 25.40 mm)
Collet Shank Diameter 0.500 Inches (1/2 in. / 12.70 mm)
Overall Tool Length 3.000 Inches (3 in. / 76.20 mm)
Flute Spiral Direction Upward Spiral (Up-Cut Evacuation)
Number of Cutting Flutes 2 Cutters (Double Helical Flute Design)
Tool Body Material 100% Solid Industrial Micrograin Carbide
Maximum Rotational Speed 24,000 RPM
Plunge Cutting Capability End-Relieved Geometry for Direct Plunge Routing
Machine Format Compatibility CNC Routers, Stationary Router Tables, & Plunge Routers
Measurement Standard Fractional Imperial (SAE) Dimensions
Suitable for material type Hardwoods, Softwoods, Plywood, Composites, & MDF

Pro-Tip: Ensure your workpiece is clamped down securely or held by a strong CNC vacuum bed; the upward-shearing helical flutes actively pull the workpiece toward the spindle, so rigid fixturing is essential to prevent part chatter and ensure perfectly vertical mortise walls.