The CMT 838.254.11 Roundover Bit with Bearing is a precision carbide-tipped router bit designed to produce clean, consistent 1/4" radius roundover profiles on wood edges and panels. Built on a 1/4" shank with a 1" cutting diameter and 1/2" cutting height, this bit pilots smoothly along workpiece edges using a ball-bearing guide, delivering repeatable results on furniture edges, cabinet parts, and decorative woodworking projects. Whether you are softening sharp corners on solid hardwood or adding a refined profile to MDF panels, this CMT roundover bit combines fatigue-proof steel construction with industrial-grade carbide cutting edges for long-lasting performance.

Key Features

• Carbide-Tipped Cutting Edges (HW Material) - industrial-grade carbide stays sharp longer through hardwood, softwood, plywood, and composite materials, reducing the need for frequent bit changes.
• Fatigue-Proof Steel Body - the bit shank and body resist stress fractures under continuous routing loads, supporting safer operation and a longer service life.
• Ball-Bearing Pilot Guide - the bearing rolls along the workpiece edge and controls cut depth automatically, eliminating the need for a fence setup and producing a consistent 1/4" radius profile on every pass.
• 1/2" Bearing Diameter - as specified for this 1/4" radius model, the 1/2" bearing diameter is matched to this bit's cutting geometry, ensuring accurate piloting and a clean decorative edge profile.
• Black Bearing Washer - Correct Orientation Matters - the bearing washer must be kept right-side up to match bearing rotation on reassembly, preventing the bit from unscrewing during use and maintaining safe cutting performance.
• 2-Flute Design - dual carbide cutting edges provide a smoother surface finish on each pass and allow efficient chip clearance, reducing heat buildup at the cutting zone.
• Right-Hand Rotation - engineered for standard right-hand router spindle direction, compatible with the vast majority of handheld routers and router tables.
• 1/4" Shank - fits standard 1/4" router collets, making this bit accessible for trim routers, compact routers, and full-size routers with 1/4" collet capacity.

Why This Product

• The 1/4" radius profile is one of the most versatile edge treatments in woodworking - it softens sharp corners just enough to improve comfort and appearance on furniture, cabinet doors, shelving, and tabletops without removing too much material.
• The integrated ball-bearing guide makes this bit practical for freehand handheld routing without a fence, letting you follow curved or straight edges with consistent depth control and minimal setup time.
• With a 2-1/8" total length and 1/4" shank, this bit fits a wide range of compact and full-size routers, giving woodworkers a go-to edge-profiling tool that works with equipment they already own.
• CMT specifies 13 different radius options across the roundover bit line, with the majority offering multiple shank sizes - this 1/4" radius model is an ideal starting point for edge work on smaller workpieces and detail-oriented furniture projects.

Specifications

• Manufacturer Part Number: 838.254.11
• Brand: CMT Orange Tools
• Diameter: 1"
• Cutting Height: 1/2"
• Total Length: 2 1/8"
• Radius: 1/4"
• Shank: 1/4"
• Number of Teeth: 2
• Material: HW (Carbide-Tipped)
• Rotation: Right-Hand (RH)
• Bearing Diameter: 1/2"

Approved Applications

• Rounding over edges on solid hardwood and softwood workpieces
• Softening sharp corners on furniture parts, cabinet doors, and shelving
• Decorative edge profiling on plywood, MDF, and chipboard panels
• Edge work on laminate and melamine panels
• Handheld freehand routing along straight and curved edges
• Router table edge profiling on smaller workpieces