Corner Round Router Bit For Clean Edge Profiles

corner round router bit from Amana Tool is a basic edge-forming router bit that rounds an edge to a given radius, so you get a controlled, repeatable profile when shaping workpieces. This 1-5/8 inch diameter bit with 9/16 inch radius is designed to cut a fillet as it rounds, giving you a smooth eased edge with a defined shoulder in one pass. The 2-flute cutting design shapes the profile while supporting a steady cut path. A 3/4 inch cutting height allows you to run consistent edge treatments along boards within that profile depth. The 1/2 inch shank connects to routers that accept this size, providing the interface needed to drive the bit. An overall length of 2-5/8 inches positions the profile and shank for typical router collet engagement on many setups.

Key Edge-Forming Details For Daily Routing

• This corner-rounding bit rounds an edge to a given radius so you can produce consistent corner profiles when easing sharp edges on parts.
• The cut forms a fillet while rounding, which creates a simple decorative shoulder that can serve as a clean transition on cabinet or furniture components.
• The profile can be used to ease edges as a simple profile or integrated as one element of a more complex multi-step edge design on millwork.
• Also known as round over, rounding over, and quarter-round, this bit style supports familiar edge treatments across different routing setups.
• If a smaller pilot bearing is used, a second shoulder can be produced, in effect turning this tool into a beading bit for a more detailed edge.
• Diameter of 1-5/8 inches and 9/16 inch radius define the working curve so you can match the profile to drawings or existing parts.

Shank And Cut Dimensions For Router Setup

The 1/2 inch shank connects this router bit to routers that accept a 1/2 inch collet, giving a sized interface for driving the profile under load. A cutting height of 3/4 inch defines the vertical span of the profile, so you can plan how much of the board edge will be shaped during a pass. With an overall length of 2-5/8 inches, the bit positions the cutting edges and shank to work within common collet engagement ranges. The 1-5/8 inch cutting diameter sets the sweep of the radius and fillet, which helps lay out clearance near fences or guides.

Corner Round Bit Use In Profiling Workflows

Where This 9/16 Radius Router Bit Fits

This corner round router bit is part of the profiling router bits class, so it is suited to operations where an edge shape is formed along board or panel edges. As a basic edge-forming bit, it addresses tasks where sharp corners are turned into a rounded 9/16 inch radius, giving parts an eased feel and appearance. The 1-5/8 inch diameter and 3/4 inch cutting height align to applications that call for a moderate profile depth rather than extremely small or oversized radii. Also described as round over, rounding over, and quarter-round, this tool fits standard edge profile expectations on trim, cabinet components, and similar workpieces that benefit from a consistent curved edge.

Why These Dimensions Support Repeatable Results

The defined 9/16 inch radius means every pass produces the same curve, which supports repeatable results from part to part when running production or matching existing profiles. Because the cut forms a fillet as it rounds, the bit creates a clear shoulder that can visually separate the edge from the face, helping parts register uniformly against adjacent components. The option to use a smaller pilot bearing to produce a second shoulder effectively turns the same cutting profile into a beading bit, allowing the same tool geometry to generate a more detailed edge when needed. The 2-flute configuration provides a balanced number of cutting edges around the 1-5/8 inch diameter, which helps maintain a steady cut path as the router advances along the material. All dimensional details - including diameter, radius, cutting height, shank size, overall length, and D1 of 1/2 inch - work together to define how the bit seats in the router and how the profile tracks against bearings or guides during repeated passes.

Common Corner Round Router Bit Questions

Select This Bit For Defined Radius Edge Work

This Amana Tool 1-5/8 inch x 9/16 inch radius corner round router bit with 1/2 inch shank offers a set radius and fillet cut for reliable edge shaping. When a profiling job calls for a 9/16 inch round over or quarter-round, this 2-flute bit provides the defined dimensions needed to match that specification. Add this router bit when your workflow benefits from a consistent curved edge that can also serve as part of more complex profiles.