The CMT 838.817.11 Roundover Bit with Bearing is a precision carbide-tipped router bit designed to produce smooth, consistent 3/8" radius roundover profiles on wood edges and surfaces. Built from fatigue-proof steel with a 2-flute cutting configuration and a 1/2" shank, this bit delivers repeatable results on solid hardwood, softwood, plywood, MDF, and more. The integrated ball-bearing guide pilots along the workpiece edge to maintain consistent cutting depth throughout every pass, making it a reliable choice for furniture edge profiling, corner softening, and decorative edge work on a router table.

Key Features

• 3/8" Roundover Radius with Integrated Bearing Guide - the bearing rides along the material edge to maintain consistent cut depth automatically, reducing the need for manual adjustments and ensuring uniform profiles across every workpiece.
• Carbide-Tipped Cutting Edges (HW Material) - industrial-grade carbide tips stay sharp longer than standard high-speed steel, reducing downtime between sharpenings and maintaining clean cuts through hardwood, softwood, plywood, MDF, and laminates.
• Fatigue-Proof Steel Body - the bit body is manufactured from fatigue-proof steel, which resists stress fractures and deformation under repeated use, extending the working life of the bit.
• 2-Flute Cutting Configuration - dual cutting edges deliver a smooth, balanced cut with less vibration, producing cleaner edge profiles and reducing tearout on sensitive materials.
• 1/2" Shank Diameter - the full 1/2" shank provides a secure, stable grip in the router collet, minimizing deflection and chatter during cutting for improved accuracy and finish quality.
• Right-Hand Rotation - designed for standard right-hand rotation compatible with most handheld routers and router tables, making setup straightforward and predictable.
• 1/2" Bearing Diameter - the standard 1/2" bearing diameter on this 3/8" radius bit is consistent with the CMT roundover series design, ensuring proper pilot contact and reliable edge-following performance.
• Black Bearing Washer - Correct Orientation Required - the black bearing washer must be kept right-side up to match bearing rotation when reassembling; correct reassembly prevents the bit from unscrewing during operation, an important safety consideration.

Why This Product

• Router Table Recommended for Larger Profiles - bits featuring a radius from 1" to 1 1/2" are designed for router table use; this 3/8" radius bit offers versatility for both handheld routers and router table setups, giving woodworkers more flexibility across different project setups.
• Carbide and Steel Construction Built for Longevity - with carbide-tipped cutting edges and a fatigue-proof steel body, this bit is engineered to withstand repeated cuts through dense hardwoods and composite materials without premature wear, reducing the total cost of ownership over time.
• Consistent, Repeatable Results Across Multiple Passes - the integrated bearing guide removes guesswork from edge-following, so each pass produces the same 3/8" profile - critical for matching edges across furniture panels, cabinet doors, or tabletops.
• Wide Material Compatibility - the hardened carbide tips handle a broad range of materials including solid hardwoods, softwoods, plywood, MDF, chipboard, laminates, and melamine, making this a single bit capable of serving many different woodworking and cabinetmaking applications.

Specifications

• Manufacturer Part Number: 838.817.11
• Brand: CMT Orange Tools
• Diameter: 1 1/4"
• Cutting Height: 5/8"
• Total Length: 2 1/2"
• Radius: 3/8"
• Shank: 1/2"
• Number of Teeth (Flutes): 2
• Material: Carbide-Tipped (HW)
• Rotation: Right-Hand (RH)
• Bearing Diameter: 1/2"

Approved Applications

• Rounding over edges on solid hardwood and softwood
• Edge profiling on plywood, MDF, chipboard, and melamine panels
• Softening sharp corners on furniture components and cabinet doors
• Decorative edge work on tabletops and shelving
• Edge treatment on laminates and plastic sheet materials