Freud Straight Router Bit 12-186 1-3/8 Inch Double Flute (1/2 Inch Shank TiCo Carbide 16000 RPM CNC Slab Surfacing Grooving Plywood Joinery)

Freud 12-186 1-3/8 Inch Double Flute Straight Router Bit

The Freud 12-186 is a 1-3/8-inch overall cutting diameter double flute straight router bit engineered for wide surface flattening, slab leveling, deep dado jointing, and rapid stock removal. Built with a rigid 1/2-inch shank and a 1-1/4-inch carbide cutting height, this 2-cutter tool features end-relieved tip geometry that enables clean, burn-free plunge entries into timber stock and composite panels. Tipped with TiCo™ Hi-Density Micrograin Carbide and computer-balanced for chatter-free rotation, it operates at speeds up to 16,000 RPM across CNC machinery, router tables, or handheld routers in solid hardwoods, softwoods, plywood, and wood composites.

Best Used For:

• Live-Edge Slab & Spoilboard Surfacing: Leveling wide hardwood slabs, workbench tops, and CNC spoilboard surfaces with minimal overlap ridges.
• Wide 1-3/8-Inch Dado & Groove Milling: Cutting extra-wide dado channels, joinery slots, and rabbets in heavy timber frames and paneling.
• Plunge Pocketing & Deep Material Evacuation: Plunging directly into wood stock to route wide interior cutouts, deep pockets, and blind mortises.

Key Performance & Safety Features

• TiCo™ Hi-Density Micrograin Carbide: Custom-formulated titanium-cobalt carbide tips maintain sharpness under continuous heavy thermal loads.
• Heavy-Duty 1/2-Inch Shank: Rigid 1/2-inch steel shank diameter minimizes tool flex, runout, and cutter vibration during high-torque surfacing.
• End-Relieved Plunge Cut Tip: Precision-ground end face permits vertical drilling entry for starting internal grooves and blind mortises.
• Dual-Flute Precision Balance: Computer-balanced twin cutters distribute chip load evenly to produce smooth sidewalls and flat bottom cuts.
• Optimized Hook & Shear Angles: Shear-angled cutting geometry slices through wood fibers cleanly to minimize chip tearout and burning.
• 16,000 RPM Maximum Speed Rating: Precision-balanced body design enables stable, chatter-free rotation under demanding feed rates.

What's Included

• (1) Freud 12-186 1-3/8" Double Flute Straight Router Bit with 1/2" Shank

Technical Specifications

Brand Manufacturer Freud® Tools Model Part Number OEM SKU 12-186 Overall Cutting Diameter (D) 1.375 inches (1-3/8" / 34.9 mm) Shank Diameter (A) 0.500 inches (1/2" / 12.7 mm) Carbide Cutting Height (h) 1.250 inches (1-1/4" / 31.8 mm) Overall Tool Length (H) 3.000 inches (3" / 76.2 mm) Number of Carbide Cutters 2 Flute Carbide Cutters Cutting Style Profile Straight / Plunge Cutting Edge Maximum Operating Speed 16,000 RPM Cutter Metallurgy Material TiCo™ Hi-Density Micrograin Carbide Tipped Primary Machine Compatibility CNC Routers, Handheld Routers, Router Tables

Pro-Tip: Due to the large 1-3/8-inch cutting diameter, dial back router speed to 16,000 RPM or lower and step down pass depths to 1/4 inch or less to protect the motor and maintain control during wide surfacing passes.