Bull Nose Router Bit For Clean Edgeforming

Bull nose router bit from Amana Tool is designed for shaping edges on woodworking projects where a smooth rounded profile is needed, which helps installers produce consistent, finished edges job after job. The bit is described as ideal for shaping stair treads, window sills, table and counter edges, shelves, and making moldings, so one profile can handle a wide range of trim and furniture work on site or in the shop. The bit has a 1-1/4 inch diameter (D), which spreads the cut over a wider area for a fuller bull nose profile on thicker stock. A 3/8 inch radius (R) is specified, so the curve has a defined, repeatable shape that matches layout and design requirements when the same setting is used across multiple parts.

Key Bull Nose Bit Details For Daily Work

• The cutting height (B) is 1-5/16 inch, so the edgeforming profile can be run deep enough to cover the edge of common stair treads, shelves, and thicker tops in a single guided pass when material thickness suits that dimension.
• The shank (d) is 1/2 inch, which fits routers that accept 1/2 inch shank tooling and provides a larger mounting surface in the collet for stable running during heavier edgeforming operations.
• The overall length (L) is 2-3/4 inch, giving enough reach for standard router baseplates or router tables while keeping the cutting length concentrated near the work for controlled handling.
• The bit uses 2 flutes, which means two cutting edges engage the material and can provide a balanced cut that supports a smoother finish when feed and speed are set appropriately.
• The M dimension is listed as 3/4 inch, indicating a measured portion of the bit geometry that can be used when setting fence position or edge guide location for repeatable bull nose placement along the workpiece.

Installation And Setup For Guided Routing

The bull nose router bit must be used with an edge guide on handheld routers or the fence on a router table, so the cutting profile tracks straight along the workpiece edge and maintains a consistent reveal from end to end. The 1/2 inch shank works with routers that accept this shank size, allowing the bit to be secured firmly in the collet for steady operation when running along guides or fences. With a cutting height of 1-5/16 inch and a 3/8 inch radius, installers can set depth to place the bull nose where it is needed on the edge and keep that setup for multiple components. The 2-3/4 inch overall length supports typical insertion depth while still leaving adequate cutting projection for guided edge work in common stair, sill, and counter applications.

Using This Bit For Stair, Sill, And Edge Work

Radius Bull Nose Router Bit In Woodworking

The Amana Tool bull nose router bit is specified as ideal for shaping stair treads, where the 3/8 inch radius forms a rounded edge that transitions from tread surface to face, giving a defined profile along each step. The same radius and 1-5/16 inch cutting height suit window sills, allowing the bit to form a consistent bull nose that runs the full visible edge of the sill in a straight, guided cut. For table and counter edges, the 1-1/4 inch diameter helps produce a substantial curve that visually softens the edge while keeping the profile uniform across long runs. Shelves and moldings also benefit from this geometry, since the bit can be set once and used to repeat the same edge detail across multiple parts in a project.

Bull Nose Router Bit For Repeatable Results

The specified 3/8 inch radius (R) and 1-1/4 inch diameter (D) work together to define the exact bull nose shape, so when fence or edge guide settings are locked, every pass matches the previous one on treads, sills, or shelves. The 1-5/16 inch cutting height (B) provides enough vertical coverage to place the curve accurately on thicker stock, which supports consistent alignment of the bull nose relative to the face and top of the workpiece. With 2 flutes, the bit presents two cutting edges per revolution, helping maintain a steady cutting action along the entire guided path. The 1/2 inch shank diameter adds rigidity at the router collet, which supports smoother tracking along a fence or edge guide, especially when running longer edges on tables and counters where straight, uniform profiles are important.

Common Questions About This Bull Nose Bit

Select This Bit For Consistent Bull Nose Edges

The Amana Tool bull nose router bit combines a 1-1/4 inch diameter, 3/8 inch radius, and 1-5/16 inch cutting height to deliver a defined edgeforming profile on stair treads, window sills, tables, counters, shelves, and moldings. A 1/2 inch shank and 2 flute design support stable, guided cuts along an edge guide or router table fence. For installers and woodworkers who need a repeatable bull nose shape across multiple parts, this bit provides a clearly specified geometry that aligns with common trim and furniture dimensions.