CMT 838.993.11 Roundover Bit with Bearing is a large-profile carbide-tipped router bit designed for creating smooth, consistent roundover edge profiles on furniture, cabinetry, and solid wood projects. With a 3" cutting diameter, a 1 1/8" radius, and a 1 1/2" cutting height, this bit is purpose-built for router table use where controlled, repeatable edge shaping on wide stock is required. The integrated bearing guide pilots along the workpiece edge to maintain a consistent depth of cut across the full length of any pass. Made from fatigue-proof steel with a 2-flute tungsten carbide cutting edge, the CMT 838.993.11 is a professional-grade solution for edge profiling, decorative detail work, and softening sharp corners on hardwood, softwood, plywood, MDF, and similar materials.

Key Features

• 3" Cutting Diameter with 1 1/8" Radius - delivers a bold, sweeping roundover profile in a single pass, reducing the need for multiple setups or progressive cuts on wide stock.
• 1 1/2" Cutting Height - accommodates thick solid wood panels and wide edge profiles, making it practical for furniture legs, tabletop edges, and heavy stock profiling.
• 2-Flute Tungsten Carbide (HW) Cutting Edges - harder and more heat-resistant than standard steel, carbide tips hold a sharper edge longer and deliver cleaner cuts across hardwood, softwood, MDF, plywood, and composite materials.
• Integrated Bearing Guide - the 3/4" diameter bearing runs along the edge of the workpiece to self-register depth of cut, eliminating the need for a fence on matching profiles and ensuring consistent results pass after pass.
• 1/2" Shank Diameter - the larger shank provides superior rigidity and vibration damping compared to 1/4" shank alternatives, resulting in smoother surfaces and reduced chatter during cuts.
• Right-Hand Rotation (RH) - compatible with all standard router tables and handheld routers using conventional right-hand collets, with no adapter or special setup required.
• Fatigue-Proof Steel Body - the bit body is manufactured from fatigue-proof steel, which resists stress fractures under repeated high-load cutting cycles, extending the service life of the tool.
• 3 1/2" Total Length - provides adequate reach and clearance above the router table surface for secure collet engagement while still allowing access to the full cutting height.

Why This Product

• The 1 1/8" radius profile is one of the larger roundover options in the CMT lineup and uses a 3/4" bearing diameter - a wider bearing specifically sized for this radius range - giving the bit added stability when profiling wide or heavy workpieces on the router table.
• At this radius size, the bit is intended for router table use only, which means it operates in the most controlled and repeatable cutting environment available - ideal for production runs, matched sets of parts, or any application where consistency across multiple pieces is critical.
• The 2-flute carbide construction balances cut quality with chip clearance, producing a smooth finished surface that minimizes the sanding and finishing work needed after routing - especially valuable on visible furniture edges and decorative trim.
• With 13 different radii available in the CMT roundover bit series - and this bit offering a 1 1/8" radius on a 1/2" shank - it fits naturally into a system of matched profile bits, allowing woodworkers to achieve complementary edge treatments across an entire project using the same brand and cutting standard.

Specifications

• Manufacturer Part Number: 838.993.11
• Brand: CMT Orange Tools
• Diameter: 3"
• Cutting Height: 1 1/2"
• Total Length: 3 1/2"
• Radius: 1 1/8"
• Shank: 1/2"
• Number of Flutes: 2
• Blade Material: HW (Tungsten Carbide)
• Rotation: Right-Hand (RH)

Approved Applications

• Roundover edge profiling on furniture and cabinetry
• Softening sharp corners on hardwood and solid wood panels
• Decorative edge detail work on tabletops and shelving
• Edge shaping on plywood, MDF, and composite panels
• Router table profiling of thick stock and wide edges