Studio product shot of the Freud 12-108 double flute straight router bit, featuring a 1/2-inch silver shank tapering to a 3/8-inch diameter red Perma-SHIELD coated cutter head.
Technical diagram showing a cross-section of a wood cut, indicating a precise slot width of 3/8 inch and a cutting depth of 1 inch for model number 12-108.
3D computer graphic showing a block of wood with a clean, rectangular channel groove cut into the top surface, illustrating the grooving profile of the bit.
Top-down diagram of the router bit profile showing the circular cutting path and the arrangement of the two grey carbide cutting flutes against a red background.
Studio product shot of the Freud 12-108 double flute straight router bit, featuring a 1/2-inch silver shank tapering to a 3/8-inch diameter red Perma-SHIELD coated cutter head.
Technical diagram showing a cross-section of a wood cut, indicating a precise slot width of 3/8 inch and a cutting depth of 1 inch for model number 12-108.
3D computer graphic showing a block of wood with a clean, rectangular channel groove cut into the top surface, illustrating the grooving profile of the bit.
Top-down diagram of the router bit profile showing the circular cutting path and the arrangement of the two grey carbide cutting flutes against a red background.
Freud

Freud 12-108 3/8 Inch Double Flute Straight Router Bit 1/2 Shank TiCo Carbide 1 Inch Cut Length General Purpose Grooving Edge Routing Wood

Only 1 left
SKU: 12-108
$17.79

Description

Cut Vibration-Free 3/8 Inch Grooves with the Freud Straight Router Bit on a Heavy-Duty Shank

Achieve flawless joinery and crisp grooves with the Freud 12-108 3/8 Inch Double Flute Straight Router Bit. This versatile tool is a workshop essential, perfectly sized for cutting 3/8-inch dados, rabbets, and mortises. Unlike standard bits of this diameter that often use smaller shanks, the 12-108 features a robust 1/2-inch shank. This "over-shanked" design significantly increases rigidity, effectively dampening vibration and preventing chatter. The result is perfectly straight walls and smooth, flat bottoms, whether you are routing hardwood, softwood, plywood, or abrasive composites.

Engineered for professional longevity, this bit is crafted from Freud's exclusive TiCo Hi-Density Carbide. This proprietary micro-grain formulation withstands high operating temperatures and retains a razor-sharp edge up to four times longer than standard carbide bits. The computer-balanced double flute geometry utilizes precise shear angles to slice cleanly through wood fibers, producing a polished finish that minimizes the need for sanding. With end-relieved tips designed for efficient plunge cutting, this bit is a reliable performer for CNC production, router table joinery, and general handheld routing tasks.

Key Features

  • Maximum Stability: 1/2-inch shank provides superior rigidity for the 3/8-inch cutter, ensuring chatter-free performance.
  • Versatile 3/8 Inch Diameter: Ideal for standard dadoes, grooves, and mortise and tenon joinery.
  • TiCo Hi-Density Carbide: Proprietary blend resists heat and wear for extended cutting life.
  • Clean Finishes: Precision-ground shear angles reduce tear-out and produce smooth edges.
  • Plunge Ready: Relieved tip geometry allows for vertical drilling and starting pockets in the center of the material.
  • Versatile Compatibility: Safe for use in CNC, table-mounted, and hand-held routers.
  • Multi-Material Performance: Cuts cleanly through hardwood, softwood, plywood, and composites.

What's Included:

  • (1) 3/8 In. Double Flute Straight Bit with 1/2 In. Shank (Model 12-108)

Specifications

Model Number 12-108
Overall Diameter (D) 3/8 In.
Shank Diameter (A) 1/2 In.
Carbide Height (h) 1 In.
Overall Length (H) 2-5/8 In.
Number of Cutters 2 (Double Flute)
Max RPM 24,000 RPM
Material TiCo Hi-Density Carbide
Bit Type Straight Plunge
Application Grooving, Dadoing, Edge Routing
Pro-Tip: The 3/8" diameter is a sweet spot for cutting dados for drawer construction or shelving. When cutting a groove this wide, aim to remove no more than 1/8" to 3/16" of material per pass. Taking lighter passes prevents the bit from overheating and results in a much cleaner bottom surface with less sanding required.