Product Description
CMT Roundover Bit with Bearing - 3-1/4" Diameter, 1-3/4" Cutting Height, 1-1/4" Radius, 1/2" Shank is a large-format edge profiling router bit designed for creating smooth, consistent roundover profiles on solid hardwood, softwood, and sheet goods. Built from fatigue-proof steel with carbide-tipped cutting edges, this 2-flute bit delivers clean, repeatable radius edges on furniture components, tabletops, panels, and architectural millwork. With its 1-1/4" radius, this bit falls within the range that requires router table use, making it the right choice for controlled, high-quality edge work on demanding projects. The ball-bearing guide ensures consistent piloting along the workpiece edge, producing uniform results across the full 1-3/4" cutting height.
Key Features
- 1-1/4" Radius Profile: produces a large, elegant roundover that softens sharp corners and adds a refined edge detail to furniture panels, tabletops, and cabinet components in a single pass.
- 1-3/4" Cutting Height: accommodates thicker stock and allows the full radius profile to be formed in one setup, reducing the number of passes needed on substantial workpieces.
- Ball-Bearing Guide: pilots smoothly along the workpiece edge to maintain a consistent depth of cut throughout the entire profile, eliminating guesswork and reducing the chance of uneven results.
- Carbide-Tipped Cutting Edges (HW Material): industrial-grade carbide tips maintain a sharp cutting edge longer than high-speed steel, resulting in cleaner cuts and extended bit life across a wide range of wood species and sheet materials.
- Fatigue-Proof Steel Body: the bit body is manufactured from fatigue-proof steel, which resists stress fractures under demanding router table operating conditions and contributes to long-term durability.
- 2-Flute Design: two cutting edges distribute the cutting load evenly, producing a smoother surface finish and allowing for more consistent feed rates on the router table.
- 1/2" Shank Diameter: the larger 1/2" shank provides greater rigidity and reduced vibration compared to smaller shanks, which translates directly to a cleaner edge profile and improved operator control.
- Right-Hand Rotation: compatible with all standard right-hand router tables and handheld routers, making setup straightforward for most workshop configurations.
- 3/4" Bearing Diameter: this bit uses a 3/4" bearing diameter (as specified for radius sizes of 1-1/8" and above), which is correctly matched to the large-radius geometry for accurate piloting on wide profiles.
Why This Product
- With a 1-1/4" radius and 1-3/4" cutting height, this bit is specifically suited to router table use on thicker, substantial workpieces where smaller bits simply cannot produce the full profile - making it the correct tool choice for large furniture and millwork applications.
- The combination of a carbide-tipped edge and a fatigue-proof steel body means the bit holds up to repeated use on hardwoods and composites without premature dulling or structural fatigue, supporting productive shop workflow.
- The ball-bearing pilot allows the bit to follow the natural edge of a workpiece accurately, so the roundover profile remains consistent from one end of a board to the other without relying on fences or guides alone.
- CMT offers 13 different radii in the roundover series with multiple shank options, so woodworkers building a consistent edge-profile toolkit can match this large-radius bit with smaller CMT roundover bits for a coordinated, compatible set.
Specifications
- Manufacturer Part Number: 838.994.11
- Brand: CMT Orange Tools
- Diameter: 3-1/4"
- Cutting Height: 1-3/4"
- Total Length: 3-49/64"
- Radius: 1-1/4"
- Shank: 1/2"
- Number of Teeth: 2
- Material: HW (Carbide-Tipped)
- Rotation: Right-Hand (RH)
Approved Applications
- Rounding over edges on furniture components and tabletops
- Softening sharp corners on cabinet doors, panels, and shelving
- Edge profiling on solid hardwood and softwood stock
- Decorative edge work on architectural millwork and trim
- Router table edge profiling on thicker workpieces
Frequently Asked Questions
Can this roundover bit be used with a handheld router?
No. CMT specifies that roundover bits with a radius from 1" to 1-1/2" are to be used only on a router table. Because of the large 1-1/4" radius and 3-1/4" diameter, this bit must be run on a router table - not freehand with a handheld router - for safe and controlled operation.
What bearing diameter does this bit use?
This bit uses a 3/4" bearing diameter. CMT specifies that most roundover bits in the series use a 1/2" bearing, but the larger radius sizes - including the 1-1/8" and above - use a 3/4" bearing to match the geometry of the wider profile. When reassembling the bearing, keep the black bearing washer right side up to correspond with the bearing rotation, as improper reassembly can cause the bit to unscrew during use.
How many radii are available in the CMT roundover bit series?
CMT offers 13 different radii in the roundover bit series, with the majority available in multiple shank diameter options. This allows woodworkers to select the exact profile size needed for their project while keeping a consistent tool family across their router bit set.
What materials can this roundover bit cut?
The carbide-tipped cutting edges are suited for use on solid hardwood, softwood, plywood, MDF, chipboard, melamine, laminates, and plastic. The fatigue-proof steel body and carbide tips maintain cutting performance across both natural wood species and engineered sheet goods commonly encountered in furniture and cabinetry work.
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