Studio shot of the Freud 99-051 window sash profile router bit standing upright, featuring a red Perma-SHIELD body, carbide cutters with a curved profile, and a ball bearing guide on a 1/2 inch shank.
Technical diagram illustrating the cross-section profile created by the Freud 99-051 bit, showing a window sash profile with a 1/4 inch radius.
Informational chart titled Materials displaying the types of stock suitable for the bit, including veneered plywood, hardwoods, softwoods, and composites.
Graphic titled Tools displaying a table router, indicating the specific machinery required to safely operate the window sash profile bit.
Studio shot of the Freud 99-051 window sash profile router bit standing upright, featuring a red Perma-SHIELD body, carbide cutters with a curved profile, and a ball bearing guide on a 1/2 inch shank.
Studio shot of the Freud 99-051 window sash profile router bit standing upright, featuring a red Perma-SHIELD body, carbide cutters with a curved profile, and a ball bearing guide on a 1/2 inch shank.
Technical diagram illustrating the cross-section profile created by the Freud 99-051 bit, showing a window sash profile with a 1/4 inch radius.
Informational chart titled Materials displaying the types of stock suitable for the bit, including veneered plywood, hardwoods, softwoods, and composites.
Graphic titled Tools displaying a table router, indicating the specific machinery required to safely operate the window sash profile bit.
Studio shot of the Freud 99-051 window sash profile router bit standing upright, featuring a red Perma-SHIELD body, carbide cutters with a curved profile, and a ball bearing guide on a 1/2 inch shank.
Freud

Freud Window Sash Router Bit 99-051 1/2 Inch Shank Profile (1-11/32 Dia 1-25/64 Carbide Height Glass Stop Divided Lite Frame Joinery Tool)

Only 1 left
SKU: 99-051
$72.49 USD

Description

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Production-Grade 1/2 Inch Shank 1-11/32 Inch Diameter Window Sash Profile Router Bit

The Freud 99-051 Window Sash Profile Router Bit operates as a specialized architectural millwork shaper engineered to mill decorative sticking profiles and glass rabbet recesses along window stiles, rails, sash bars, and muntins. Designed as the sticking component of Freud's divided lite window system, this 1/2-inch shank tool pairs with the 99-050 rail end coping cutter to construct multi-pane wood window frames up to 1-3/8 inches thick. Driven by micro-grain TiCo titanium cobalt carbide flutes with a non-stick red Perma-SHIELD finish, the 1-11/32-inch overall diameter bit features a 1-25/64-inch carbide cutting height, a 1/4-inch radius, and a 22mm pilot ball bearing, executing burn-free profile passes on table routers at speeds up to 16,000 RPM across hardwoods, softwoods, plywood, and composite timber.

Best Used For:

  • Window Sash Frame Profiling: Milling decorative edge stickings and integral glass-seating rabbets on vertical stiles, horizontal rails, and muntin bars for divided lite windows.
  • Divided Lite Window Fabrication: Pairing with matching rail end coping bits to construct custom multi-pane wood sashes up to 1-3/8 inches thick.
  • Historical Millwork Reproduction: Replicating classic 1/4-inch radius window frame sticking details during interior and exterior architectural restoration.

Key Performance & Safety Features

  • Precision Frame Sticking Geometry: Shapes exact decorative profiles and glass rabbet ledges on sash bars to receive individual glass panes.
  • TiCo Micro-Grain Carbide Flutes: Specialized titanium cobalt carbide formulation maintains razor-sharp cutting edges through abrasive hardwood runs.
  • Perma-SHIELD Thermal Barrier: Non-stick red fluoropolymer coating resists resin pitch buildup, reduces cutting friction, and protects against rust.
  • Two-Bit System Compatibility: Precision-matched to pair with the Freud 99-050 coping bit for complete interlocking divided lite window joinery.
  • Router Table Fence Requirement: Engineered exclusively for safe material control and zero-chatter shaping on table-mounted routers equipped with fences.

What's Included

  • (1) Freud 99-051 1-11/32" Diameter Window Sash Profile Router Bit with 1/2" Shank
  • (1) 22mm (7/8") Precision Steel Pilot Ball Bearing Guide

Technical Specifications

Brand Name Freud Tools
Model Number SKU 99-051
Tool Classification Window Sash Profile Router Bit
Shank Diameter Track 0.50 in. (1/2 in.)
Overall Cutter Diameter (D) 1.34375 in. (1-11/32 in.)
Carbide Cutting Height (h) 1.390625 in. (1-25/64 in.)
Overall Tool Length (H) 3.4375 in. (3-7/16 in.)
Minor Profile Height (m) 0.53125 in. (17/32 in.)
Profile Radius (R) 0.25 in. (1/4 in.)
Pilot Bearing Diameter (B) 0.866 in. / 22 mm (approx. 7/8 in.)
Number of Cutters 2 Flutes
Maximum Operating Speed 16,000 RPM
Required Equipment Setup Table-Mounted Router with Auxiliary Fence
Material Applications Hardwood, Softwood, Plywood, Composition Wood

Pro-Tip: When routing long sticking profiles on thin window muntin strips, use featherboards positioned both horizontally and vertically against the table and fence. Constant down-pressure stabilizes delicate stock through the 1-25/64 inch carbide cut, preventing flutter at 16,000 RPM and delivering a glass-smooth finish.