2-1/4" x 7/8" Radius Corner Round Router Bit, 2-Flute, 1/2" Shank

Corner Round Router Bit For Clean Edgeforming

corner round router bit from Amana Tool is a basic edge-forming bit that rounds a workpiece edge to a set radius, so you can produce consistent, repeatable profiles on trim, furniture parts, or cabinet components. The 7/8 inch radius design cuts a defined fillet as it rounds the edge, which adds a clear transition line that reads cleanly on finished parts. This bit is also described as a round over, rounding over, or quarter-round bit, so it fits common edge-shaping terminology used in many shops. The 2-1/4 inch cutting diameter creates a substantial profile in a single pass, which helps you build bolder edges without stacking multiple operations. A cutting height of 1-1/4 inches gives vertical coverage for thicker stock, so the profile tracks fully along the edge instead of tapering out mid-face.

Key Corner Round Bit Details For Shop Use

• The 7/8 inch radius corner-rounding design shapes a generous round over, which is useful when you want a softer, more substantial edge rather than a slight ease on cabinet or furniture parts.
• The fillet produced at the edge of the radius creates a crisp land, which visually separates the profile from the flat face and helps minor sanding stay away from the main curve.
• The 2-1/4 inch diameter body presents a wide cutting circle, which allows the full radius and fillet to be formed in one pass on suitable stock thickness, simplifying your routing workflow.
• The 1-1/4 inch cutting height supports shaping along taller edges, which helps maintain a consistent profile on thicker tops, rails, or other deep edge components in one continuous run.
• The 1/2 inch shank is sized for routers that accept 1/2 inch bits, which supports stable grip and reduces deflection as the large 2-flute cutting edges engage the material.
• The 2-flute layout provides two cutting edges in rotation, which evens out the cut load and supports a smoother edge profile compared to a single-flute configuration.

Corner Round Router Bit Fit And Setup Details

This 1/2 inch shank corner round router bit fits router collets designed for a 1/2 inch shank, so it can be secured firmly before shaping edges. The 2-1/4 inch diameter and 3-1/16 inch overall length define how the bit extends from the collet, which helps you plan height and fence positions for the desired profile. A 1-1/4 inch cutting height allows you to bring the full 7/8 inch radius and fillet into the cut while still having shank length available for a solid grip. The part designation D1 at 1/2 inch references an additional dimension on the bit, which can help when matching setup sheets or aligning the bit to existing profiles in repeat jobs.

Using This Edgeforming Bit In Real Projects

Where This 7/8 Radius Corner Round Bit Fits

This 2-1/4 inch x 7/8 inch radius corner round router bit is suited to edgeforming where a larger round over is desired, such as thicker tops or wider rails that benefit from a fuller profile. The 7/8 inch radius sets how much material is removed at the edge, so you can match this bit to stock thickness where that amount of rounding leaves a strong shoulder. Because the design is also known as a round over, rounding over, or quarter-round, it aligns with common shop language when specifying tooling for edge work. The defined fillet built into the cut means every pass establishes a transition line between the curved edge and the flat face, which is useful when multiple parts need to match across a run.

Why These Dimensions Support Repeatable Results

The 2-1/4 inch diameter of this Amana Tool router bit governs the sweep of the cutting edges, so once you set fence and height, the 7/8 inch radius and fillet repeat from part to part without re-measuring the curve itself. The 1-1/4 inch cutting height provides enough vertical reach for typical edge thicknesses, which keeps the full round over on the cutting portion of the bit for a consistent finish. A 1/2 inch shank holds securely in compatible router collets, which supports steady tracking of the bearing or fence along the workpiece. The D1 dimension of 1/2 inch gives an additional reference point when recording setups, so returning to a proven edge profile is straightforward on future batches using manufacturer part 49521.

Common Questions About This Corner Round Router Bit

Select This Bit For Consistent 7/8 Radius Edges

The Amana Tool 2-1/4 inch x 7/8 inch radius corner round router bit with 1/2 inch shank and 2-flute design provides a defined round over with a clean fillet for edgeforming work. With a 1-1/4 inch cutting height, 3-1/16 inch overall length, and D1 dimension of 1/2 inch, the bit offers clear reference measurements for repeat setups tied to part number 49521. For projects that call for a consistent 7/8 inch radius profile described as round over, rounding over, quarter-round, or even a beading option with a smaller pilot bearing, this cutter gives a focused solution for shaping cabinet and woodworking edges.