The CMT Ovolo Sash Bit - Profile A - 63/64" Diameter x 3/4" Cutting Height - 25/64" Radius - 1/4" Shank is a precision-ground, bearing-guided router bit engineered for crafting true divided light cabinet doors, sash bar windows, and stile-and-rail frame constructions. With its ovolo profile geometry, this two-flute hardwood-carbide bit delivers clean, consistent moulding on both straight and curved frames, making it an ideal choice for fine furniture makers, cabinetmakers, and millwork professionals who demand repeatable results in solid hardwood, softwood, and engineered wood applications.

Key Features

• Ovolo Sash Profile A Geometry - the bearing-guided ovolo profile enables routing of curved as well as straight frames, giving woodworkers the flexibility to produce true divided light doors and glazing bar window sash in a single pass without repositioning.
• Bearing-Guided Design - the guide bearing follows the workpiece edge automatically, keeping the cut consistent along curved and straight stock alike and reducing the need for fences or jigs during sash moulding work.
• 2-Flute HW (Hardwood Carbide) Construction - two cutting edges made from industrial-grade carbide maintain sharpness through extended production runs in hardwood, softwood, plywood, MDF, chipboard, laminates, and melamine, reducing downtime between sharpenings.
• 1/4" Shank - the compact 1/4" shank is compatible with a wide range of handheld routers and router tables, making this bit accessible without requiring a large-collet machine.
• 25/64" Radius - the precisely ground 25/64" ovolo radius produces a classically proportioned moulding profile suited to traditional sash windows, cabinet door frames, and cove-style drawer pull details.
• 2" Total Length - the 2" overall length provides adequate clearance above the collet for secure gripping while keeping the bit compact enough for controlled, vibration-free routing passes.
• Right-Hand Rotation (RH) - standard right-hand rotation ensures compatibility with conventional router spindle direction, so the bit mounts and runs without any special setup or reversal procedure.

Why This Product

• Purpose-built for divided light door and sash window work - the bearing-guided ovolo profile handles the curved glazing bars and straight stile-and-rail joints that define traditional and craftsman-style cabinetry, eliminating the need for multiple specialized bits.
• Works on curved frames as well as straight stock - because the bit is bearing-guided, it can follow non-linear workpiece edges, opening up design possibilities in arched window sash and radius cabinet doors that flat-only bits cannot address.
• Hardwood-grade carbide (HW material) holds a sharp edge through demanding production use in dense hardwoods and abrasive sheet goods like MDF and melamine, reducing the frequency of bit changes on longer runs.
• The 1/4" shank makes this bit usable in compact trim routers and full-size router tables alike, so woodworkers with smaller shop setups are not excluded from professional sash moulding results.

Specifications

• Manufacturer Part Number: 855.307.11M
• Brand: CMT Orange Tools
• Diameter: 63/64"
• Cutting Height: 3/4"
• Total Length: 2"
• Radius: 25/64"
• Shank: 1/4"
• Number of Flutes: 2
• Material: HW (Hardwood Carbide)
• Profile: A
• Rotation: Right-Hand (RH)

Approved Applications

• True divided light cabinet door making
• Sash bar window frame routing
• Stile and rail frame construction
• Curved glazing bar moulding
• Cove-style drawer handle profiles
• Fine furniture frame joinery