The CMT 838.190.11 Roundover Bit with Bearing is a precision carbide-tipped router bit designed to produce clean, consistent 1/8" radius roundover profiles on wood edges and corners. Built on a 1/4" shank with a 3/4" cutting diameter and 1/2" cutting height, this two-flute right-hand bit is ideal for softening sharp edges on furniture, cabinetry, millwork, and solid hardwood panels. The integrated ball bearing guide rides along the workpiece edge to maintain a uniform cutting depth with every pass, making edge profiling repeatable and accurate whether you are working freehand with a handheld router or at a router table.

Key Features

• 1/8" roundover radius with integrated ball bearing guide - the bearing pilots smoothly along the workpiece edge so you achieve a consistent, repeatable profile on every cut without the need for fences or jigs.
• 3/4" cutting diameter and 1/2" cutting height - sized to handle a full edge profile on standard lumber and panel stock in a single pass, reducing setup time and secondary sanding.
• 1/4" shank diameter - compatible with a wide range of handheld routers and compact router tables that accept 1/4" collets, making this bit highly versatile across tool types.
• Two-flute (2-tooth) carbide-tipped cutting edges - HW (hard metal / carbide) tips maintain a sharp cutting edge longer than high-speed steel, producing cleaner cuts on hardwood, softwood, plywood, MDF, laminates, and plastic with less tearout.
• Right-hand (RH) rotation - matches the standard rotation of virtually all routers on the market, so the bit installs and operates safely without any special setup.
• Fatigue-proof steel body - the bit body is manufactured from fatigue-proof steel, which resists stress fractures and maintains structural integrity during extended use, improving operator safety and tool longevity.
• 12.7 mm (1/2") bearing diameter - the standard bearing size used across the CMT roundover series (excluding the largest radius options) provides a consistent bearing reference surface for predictable edge following.
• 2 1/8" total length - a compact overall length that keeps the bit stable in the collet and reduces vibration during routing operations.
• Black bearing washer orientation matters - keeping the black bearing washer right side up during reassembly ensures the bearing rotates correctly and prevents the bit from loosening during operation, an important safety consideration.

Why This Product

• A 1/8" radius is one of the most commonly used roundover profiles in furniture making and cabinetry - this bit handles that task with a built-in bearing guide that eliminates the guesswork of manual depth setting, making it a practical everyday choice for woodworkers of all skill levels.
• The carbide-tipped, fatigue-proof steel construction means the cutting edges stay sharp through hardwood, softwood, MDF, plywood, laminates, and plastic - so you can move between materials without swapping bits or re-sharpening after every session.
• The 1/4" shank fits a broad range of compact and full-size routers, giving this bit flexibility across a shop's tool inventory without requiring a dedicated machine or collet adapter.
• CMT's design note about the 1/16" radius roundover bit being excellent for finishing laminates applies here as well - this 1/8" radius bit is equally at home on laminated panels where a clean, chip-free edge is essential for a finished appearance.

Specifications

• Manufacturer Part Number: 838.190.11
• Brand: CMT Orange Tools
• Bit Type: Roundover Bit with Bearing
• Diameter: 3/4"
• Cutting Height: 1/2"
• Total Length: 2 1/8"
• Radius: 1/8"
• Shank: 1/4"
• Number of Teeth: 2
• Rotation: Right-hand (RH)
• Material: HW (Carbide-Tipped)
• Bearing Diameter: 1/2"

Approved Applications

• Rounding over and softening sharp edges on solid hardwood and softwood
• Edge profiling on furniture components, cabinet doors, and drawer fronts
• Decorative edge work on plywood, MDF, chipboard, and melamine panels
• Clean edge finishing on laminates and plastic sheet materials
• Freehand routing with a handheld router (1/8" radius and below are well suited for handheld use)
• Router table operation for guided, repeatable edge profiles