Amana Tool 49612 beading bit 3/8 radius

Amana Tool 49612 Beading Bit For Clean Edgeforming

Amana Tool 49612 beading bit is an edge forming carbide tip router bit designed to cut a quarter-round shape bounded by fillets in a single pass. This beading profile creates a defined bead that finishes an exposed edge in one routing step, which helps streamline edgeforming work on routing projects.

The bit uses a bottom mount ball bearing guide, so the bearing rides the edge of the workpiece and steers the cut. That guided contact helps keep the quarter-round and fillets aligned to the edge, supporting consistent results on repeat passes along similar stock.

This router bit belongs to the Bits, Blades and Cutters edgeforming category and uses a 1/4 inch shank, so it is sized to fit routers that accept 1/4 inch shank bits. The carbide tip cutting edges are configured as a 2 flute design, which allows the cutting height and diameter to work together for a smooth beading cut when run with a steady feed rate.

Edgeforming Details That Support Bead Control

• The cutting geometry produces a quarter-round bead bounded by fillets in one pass, so the edge receives both the radius and the small flats together, which helps deliver a finished profile without secondary shaping steps on that edge.
• The pilot bearing size fixes the width of one fillet, so that side of the bead stays consistent from piece to piece when the bearing follows the workpiece edge, which supports repeatable visual alignment along cabinet or furniture edges.
• The depth of cut governs the opposite fillet width, so changing how far the bit is set into the material adjusts that fillet dimension, giving control over how strong or subtle the bead transition appears relative to the flat field.
• The bit can be transformed from a beading bit into a corner rounding bit by changing the bearing, so the same cutting profile can serve two routing roles, which is useful when alternating between a full bead and a simple rounded corner along different edges.
• The stated diameter of 1-1/4 inch and radius of 3/8 inch define the size of the quarter-round cut, so the bead projection and curve are known, which aids layout planning when matching this edge detail to other milled profiles in a project.
• The cutting height of 5/8 inch sets the maximum vertical extent of the bead section, so edges within that thickness range can be profiled in one pass, supporting efficient processing of common panel and stock dimensions.

Router Bit Shank, Length, And Pass Setup

The 1/4 inch shank on this router bit is intended for routers and collets sized for 1/4 inch shank tooling, so it fits that common handheld and table-mounted router interface. That standard shank size allows the bit to be gripped securely in a matching 1/4 inch collet during edgeforming work.

The overall length of 2-3/16 inch defines how far the bit extends from the collet, which factors into how the router base or table fence can be set when positioning the bearing along the stock edge. Knowing the overall length also matters when adjusting bit height so the 5/8 inch cutting height fully engages the workpiece where the bead is needed.

With the bottom mount ball bearing guide, the workpiece edge serves as the reference surface, so setting the router so the bearing runs smoothly along that edge supports maintaining the 3/8 inch radius curve and fillets as described. That geometry keeps the bead shape consistent wherever the bearing tracks along a straight or smoothly curved edge.

Beading Router Bit Use In Edgeforming Workflows

Where This Beading Router Bit Is Applied

This router bit is part of the edgeforming class of router bits and is designed to cut a beading profile, so it is used wherever a quarter-round bead bounded by fillets is desired along an edge. The bit works by producing the full bead shape in a single pass, so an edge can receive its decorative or functional profile during one routing operation rather than combining multiple bits or cuts for the same shape.

The ball bearing guide is mounted at the bottom of the bit, so the bearing rolls along the workpiece edge and guides the cutting edges. In practice, this means the bit follows the existing edge contour within the limits of the bearing contact, which helps keep the bead parallel to the stock face as the router moves along the length.

The 3/8 inch radius value corresponds to the quarter-round curve of the bead, so that dimension defines how far the bead projects from the original corner. This known radius helps when matching the bead to other components machined with a similar radius, such as mating edges or trim pieces, creating a consistent look wherever the 3/8 inch radius appears.

How Bead Geometry And Bearing Support Results

The relationship between the pilot bearing size and the fillet width on one side of the bead offers a predictable outcome: as the bearing size remains constant, that fillet remains the same width each time the bit is run along a similar edge. This predictability supports repeatable results when running multiple parts in sequence, since the bearing-controlled fillet does not change when the router depth setting stays stable.

On the opposite side of the bead, the fillet width depends on depth of cut, so adjusting the bit in or out relative to the router base or fence changes how much of the radius is engaged. That adjustable fillet width lets the user fine-tune the visual strength of the bead compared to the adjoining flat surface, which matters when aligning the profile to other joinery or design details.

The 2 flute configuration means the cutting edges alternate as they remove material around the 1-1/4 inch diameter path, so the chip load is shared between two flutes. This arrangement supports a balanced cut as the bit moves along the edge, which helps the bead and fillets track the intended 3/8 inch radius without unexpected steps when the router is guided steadily.

The ability to convert this beading bit into a corner rounding bit by changing the bearing extends its role in a routing setup, since the same carbide tip cutting profile can either leave a full bead with fillets or simply round a corner without the extra fillet geometry. That versatility lets the bit support different edge treatments while keeping the underlying radius and cutting height relationships consistent across those passes.

Common Buyer Questions About This Beading Bit

Choose This Bit For Controlled 3/8 Inch Beads

This edge forming beading carbide tip bit from Amana Tool, part number 49612, combines a 3/8 inch radius, 5/8 inch cutting height, and 1/4 inch shank to form a defined bead in one pass. The bottom mount ball bearing guide and 2 flute layout support consistent beading results wherever the bearing tracks the workpiece edge.

For routing work that calls for a quarter-round bead bounded by fillets, or for setups where switching between beading and corner rounding by changing the bearing is useful, this router bit offers those specific geometry relationships.