Close-up of the Freud 85-050 drainboard router bit, showing the carbide cutting head, the $1/2$ inch shank, and the engraved product number.
A profile diagram illustrating the exact shape of the cut made by the Freud 85-050 drainboard bit: a flat bottom with a $1/8$ inch radius (R $1/8"$).
A 3D cross-section illustration showing the drainboard router bit cutting parallel grooves into a solid surface countertop near an integrated sink basin.
Close-up of the Freud 85-050 drainboard router bit, showing the carbide cutting head, the $1/2$ inch shank, and the engraved product number.
A profile diagram illustrating the exact shape of the cut made by the Freud 85-050 drainboard bit: a flat bottom with a $1/8$ inch radius (R $1/8"$).
A 3D cross-section illustration showing the drainboard router bit cutting parallel grooves into a solid surface countertop near an integrated sink basin.
Freud

Freud Router Bit 85-050 1/8 Inch Radius (Solid Surface Countertop Drainboard Grooving Carbide Tipped 1/2 Inch Shank 24000 RPM Handheld Routing)

Only 2 left
SKU: 85-050
$29.95 USD

Description

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Freud 85-050 1/8-Inch Radius Solid Surface Drainboard Grooving Router Bit

The Freud 85-050 1/8-Inch Radius Solid Surface Drainboard Grooving Router Bit is a specialty countertop fabrication tool engineered to mill shallow, water-channeling drainboard grooves into solid surface materials like Corian, granite composites, and acrylic slabs. Operating at speeds up to 24,000 RPM with a 1/2-inch shank, 1/2-inch cutting height, and 2-7/8-inch overall length, this 1/2-inch diameter dual-cutter bit features a flat-bottom profile bounded by 1/8-inch radius corners and TiCo hi-density carbide tips. Optimized for handheld portable routers, this drainboard bit solves water pooling, material chipping, and inconsistent channel depth challenges in custom kitchen and bath installations.

Best Used For:

  • Solid Surface Drainboard Run-Off Channels: Milling sloped, water-draining grooves adjacent to undermount kitchen sinks in Corian and composite acrylic countertops.
  • Custom Vanity & Wet Bar Slope Grooving: Shaping decorative flat-bottom run-off channels on wet bar tops and commercial laboratory sinks.
  • Handheld Portable Router Template Grooving: Routing precise 1/2-inch wide channels using sloped straightedge templates and 1/2-inch collet routers.

Key Performance & Safety Features

  • Specialized Drainboard Flat-Bottom Profile: Features a flat cutting base bounded by 1/8-inch radius corners to facilitate smooth water run-off and simple cleaning.
  • TiCo Hi-Density Micro-Grain Carbide Tips: Premium titanium-cobalt carbide formulation maintains razor sharpness against abrasive acrylic resins and composite fillers.
  • 24,000 RPM Maximum Speed Rating: Dynamically balanced dual-flute cutter body delivers smooth, chatter-free cuts at high router spindle speeds.
  • Heavy-Duty 1/2-Inch Steel Shank: Precision-ground round shank provides maximum clamping surface area in collets to prevent bit slippage during deep channel cuts.
  • Perma-SHIELD Non-Stick Thermal Coating: Protective red fluoropolymer coating prevents resin buildup, pitch adhesion, and cutter drag.

What's Included

  • (1) Freud 85-050 1/8 in. Radius Solid Surface Drainboard Router Bit (1/2 in. Shank)

Technical Specifications

Manufacturer Brand Freud
Model Part Number (OEM) 85-050
Groove Radius Size (R) 1/8 in. (3.18 mm) Corner Radius
Overall Bit Cutting Diameter (D) 1/2 in. (12.7 mm)
Shank Interface Diameter (A) 1/2 in. (12.7 mm) Round Shank
Carbide Cutting Height (h) 1/2 in. (12.7 mm)
Overall Bit Length (H) 2-7/8 in. (73.03 mm)
Number of Cutters / Flutes 2 Carbide Cutters
Maximum Rotational Speed 24,000 RPM
Cutter Material Composition TiCo Hi-Density Micro-Grain Carbide
Surface Thermal Shield Coating Perma-SHIELD Non-Stick Red Fluoropolymer
Power Tool System Compatibility Handheld Portable Routers with 1/2 in. Collet
Primary Target Substrates Corian, Granite Composites, Acrylic Solid Surface, Man-Made Materials
Pro-Tip: Use a sloped wooden routing jig with your router's guide bushing to pitch the groove depth incrementally deeper toward the sink basin for optimal gravity-fed water drainage.