Studio product photograph of the Freud 12-178 double flute straight router bit, featuring a substantial 1/2-inch silver shank and a wide, red Perma-SHIELD coated cutter head designed for heavy stock removal.
Technical diagram specifying the dimensions of the Freud 12-178 bit: 1/2 inch shank diameter, a wide 1-1/8 inch cutting diameter, and a 1-1/2 inch carbide cutting height.
3D illustration showing a wooden block with a wide, deep, square channel groove cut into the top surface, demonstrating the heavy material removal profile of the bit.
Top-down profile diagram of the router bit showing the large circular cutting path and the arrangement of the two carbide cutting flutes with relieved tips for plunge cutting.
Studio product photograph of the Freud 12-178 double flute straight router bit, featuring a substantial 1/2-inch silver shank and a wide, red Perma-SHIELD coated cutter head designed for heavy stock removal.
Technical diagram specifying the dimensions of the Freud 12-178 bit: 1/2 inch shank diameter, a wide 1-1/8 inch cutting diameter, and a 1-1/2 inch carbide cutting height.
3D illustration showing a wooden block with a wide, deep, square channel groove cut into the top surface, demonstrating the heavy material removal profile of the bit.
Top-down profile diagram of the router bit showing the large circular cutting path and the arrangement of the two carbide cutting flutes with relieved tips for plunge cutting.
Freud

Freud 12-178 1-1/8 Inch Double Flute Straight Router Bit 1/2 Inch Shank TiCo Carbide for Heavy Mortising Grooving Wood Plywood Composites

Only 1 left
SKU: 12-178
$26.98

Description

Master Heavy Stock Removal and Wide Grooves with the Freud 1-1/8 Inch Straight Router Bit

Tackle wide dados, deep mortises, and heavy surfacing tasks with the Freud 12-178 1-1/8 Inch Double Flute Straight Bit. This robust cutter is engineered for substantial material removal, featuring a massive 1-1/8 inch cutting diameter and a 1-1/2 inch cutting height. Constructed with a heavy-duty 1/2-inch shank, it provides the stability necessary to minimize vibration during demanding cuts. The bit is crafted from Freud's exclusive TiCo Hi-Density Carbide, a specially formulated blend that offers superior hardness and heat resistance, ensuring the cutting edge stays sharp up to four times longer than standard carbide bits even in abrasive composites and plywood.

Precision and finish quality are paramount in the 12-178's design. The computer-balanced double flute geometry utilizes precise hook and shear angles to slice cleanly through hardwood and softwood fibers, leaving a smooth surface that often requires no sanding. This bit also features a specialized "Eclipse Grind" on the tips, which relieves the center of the bit to allow for efficient and safe plunge cutting. This makes it an excellent choice for pocketing, bowl routing, and CNC spoilboard surfacing. Whether used in a CNC machine, a table-mounted router, or a heavy-duty hand-held router, this tool delivers professional-grade results.

Key Features

  • Large Cutting Diameter: 1-1/8 inch width is ideal for wide grooves, mortising, and surface planing.
  • TiCo Hi-Density Carbide: Proprietary blend maximizes hardness and edge retention for extended tool life.
  • Heavy-Duty Shank: 1/2-inch shank provides maximum stability and reduces chatter during heavy cuts.
  • Plunge Cutting Ready: Eclipse grind relieved tips allow for vertical drilling and pocketing applications.
  • Deep Cutting Capacity: 1-1/2 inch carbide height handles thick stock and deep dadoes.
  • Precision Geometry: Optimized shear angles reduce cutting resistance and prevent burning.
  • Versatile Compatibility: Engineered for use in CNC, hand-held, and table-mounted routers.

What's Included:

  • (1) 1-1/8 In. Double Flute Straight Bit with 1/2 In. Shank (Model 12-178)

Specifications

Model Number 12-178
Overall Diameter (D) 1-1/8 In.
Shank Diameter (A) 1/2 In.
Carbide Height (h) 1-1/2 In.
Overall Length (H) 3 In.
Number of Flutes 2 (Double Flute)
Max RPM 18,000 RPM
Material TiCo Hi-Density Carbide
Bit Type Straight Plunge
Application Material Wood, Plywood, Composites
Pro-Tip: Due to the large 1-1/8" diameter of this bit, the rim speed is much higher than standard bits. It is critical to lower your router's speed to a maximum of 18,000 RPM. Running this bit at standard 24,000 RPM speeds can cause excessive vibration, burning of the wood, and potential safety hazards.