2-1/4 x 1/2 Radius Corner Rounding Bit defines edges by rounding them to a 1/2 inch radius, so you get a consistent soft edge profile wherever the router follows the work. The Amana Tool router bit is described as a basic edge-forming bit, so it handles everyday rounding on cabinet parts, furniture components, and similar work where a clean eased edge is needed. The bit is a corner-rounding style that cuts a fillet, which means you get a small step at the base of the round, adding a clear transition line that reads cleanly after finishing. The same cut can be used simply to ease sharp edges or built into a more complex multi-step profile, giving one tool more roles in the shop. This bit is also known as a round over, rounding over, and quarter-round bit, so it aligns with common trade terminology across drawings and cut lists.
This Amana Tool corner rounding bit uses a 1/4 inch shank, so it fits routers and collets sized for 1/4 inch tooling commonly used in cabinet and trim work. The radius is specified as 1/2 inch, so the cutting profile generates a consistent 1/2 inch curve that repeats across identical passes and jigs. The overall product name lists the bit as 2-1/4 inch by 1/2 inch radius, which defines the cutter geometry that controls how far the round projects beyond the original edge. A ball bearing guide is part of the bit description, so the bearing rides along the workpiece edge to steer the cut where the template or stock face leads it.
The corner-rounding bit is described as a basic edge-forming bit, so it slots easily into standard cabinet, furniture, and millwork tasks that call for a clean, rounded perimeter. Because the bit rounds an edge to a given radius, production runs of shelves, doors, drawer fronts, or trim can share the same 1/2 inch profile, keeping visual lines consistent across a room or project. The cut can be used to ease edges, so shop teams can run exposed plywood or solid stock edges to remove sharp corners in one pass before sanding and finishing. When used as part of a complex profile, this same corner-rounding shape can combine with other router operations to build multi-step moldings, panel edges, or tabletop rims that repeat reliably whenever the same setup is used.
The ball bearing guide on this 2-flute corner rounding bit lets the bearing follow the edge or template, so the cutting edges track the workpiece consistently without separate guide fences on many operations. The bit cuts a fillet along with the round, so the resulting profile has a crisp intersection between the curved section and the remaining flat, giving a shadow line that holds up under clear or painted finishes. If a smaller pilot bearing is used, a second shoulder can be produced, effectively making the bit a beading bit, so installers and shop crews can shift from a simple round over to a more detailed bead profile while retaining the same core cutter geometry. Being also known as a round over, rounding over, and quarter-round bit, it matches common terminology on plans and parts lists, reducing confusion when selecting tooling for repeated setups.
The 1/2 inch radius on this corner-rounding bit shapes the edge into a consistent half-inch curve, giving parts a substantial eased profile that repeats wherever the bit follows the stock.
The ball bearing guide on this router bit rides the workpiece edge or template, steering the cut so the 1/2 inch radius profile follows the contour without needing separate edge guide setups.
The 1/4 inch shank matches routers and collets sized for 1/4 inch tooling, allowing this corner-rounding bit to drop into common shop and jobsite routers used for edgeforming tasks.
This corner-rounding bit can act as a beading bit when a smaller pilot bearing is used, creating a second shoulder so the edge shows a stepped bead instead of a single round.
The fillet cut from this bit leaves a small flat at the base of the round, creating a shoulder that separates the curved edge from the face and adds a defined profile line.
This bit is also known as a round over, rounding over, and quarter-round because it performs the same edge rounding function under those trade terms, aligning with common names on plans.
The Amana Tool 2-1/4 x 1/2 Radius Corner Rounding Bit with ball bearing guide and 1/4 inch shank provides a defined 1/2 inch round with fillet, so shop and field teams can standardize a clean, repeatable edge profile. As a basic edge-forming router bit that can also serve as a round over, quarter-round, or beading bit when paired with a smaller pilot bearing, it supports multiple profile needs from one cutter. Choose this 49516 router bit when a consistent 1/2 inch radius edge and straightforward bearing-guided routing fit your cabinet, furniture, or millwork runs.
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