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7/8 x 2-1/2 right hand dovetail router bit from Amana Tool is designed for cutting stair stringers to accept stair treads, so it creates a matching dovetail profile that locks the tread into the stringer. The 7/8 inch diameter cutting profile shapes a defined dovetail, which sets the engagement area between the stringer and tread. A 7 degree angle on the bit forms the dovetail slope, which controls how the tread keys into the stringer. The cutting height of 7/8 inch matches the bit diameter, allowing a full-profile dovetail cut in one pass where the layout supports it. A 1/2 inch shank provides a solid grip in standard 1/2 inch router collets, which supports stable cuts in stair joinery work. Overall length of 2-1/2 inches keeps the tool compact, which helps with control when routing into stringer stock.
This Amana Tool dovetail router bit uses a 1/2 inch shank, so it fits routers designed for 1/2 inch shank tooling commonly used in stair and cabinet shops. The overall length of 2-1/2 inches positions the 7/8 inch cutting height close to the collet, which supports rigidity when plunging or passing along stair stringer layouts. Right hand usage works with standard router direction, so the bit tracks as expected when cutting dovetail grooves for stair treads. With a 7 degree dovetail angle and 7/8 inch cutting height, the bit shapes a consistent groove profile, which helps keep multiple stringers aligned to the same geometry across a staircase.
This router bit is specified for cutting stair stringers to accept stair treads, so it is suited to routing the dovetail sockets along stringer boards in staircase construction. The 7/8 inch diameter and 7/8 inch cutting height work together to form a dovetail groove sized around that profile, which supports consistent tread seating along the run. Right hand rotation with right hand usage coordinates with standard routing movements, which is useful when working long stringer stock on a bench or routing table. The 2-1/2 inch overall length keeps the cutting edges relatively close to the collet, which helps maintain control when guiding the bit through dense stringer material.
The 7 degree dovetail angle controls the sidewall slope of the groove, which establishes how the stair tread engages the stringer when driven into place. By combining that 7 degree angle with the 7/8 inch cutting height, the bit generates a repeatable joint geometry every pass, which is important when cutting multiple stringers for the same staircase. The two-flute design presents alternating cutting edges, which distributes the cut and supports a smoother finish in the routed groove. Right hand rotation pairs with standard router setups, so feed direction stays consistent from stringer to stringer. The 1/2 inch shank supports this geometry with a robust connection to the router, which helps the bit hold its path when cutting full-depth dovetail grooves across the length of the stringer boards.
The 45812 dovetail router bit is used for cutting stair stringers to accept stair treads, which creates dovetail grooves that hold the treads in place along the staircase.
The 7 degree angle sets the dovetail slope, which determines how the stair tread wedges into the groove and how the joint bears load along the stringer.
The 1/2 inch shank fits routers designed for 1/2 inch tooling, which provides a solid grip and supports stable cutting when forming dovetail grooves in stringers.
The 7/8 inch cutting height allows the bit to cut a full dovetail profile that matches its diameter, which can complete the groove depth in a single pass within that height.
The two-flute design provides dual cutting edges, which balances the cut and supports cleaner, smoother dovetail grooves along the stair stringer.
This dovetail router bit uses right hand rotation, which matches standard router motor direction and supports typical feed patterns in stair stringer routing.
The Amana Tool 7/8 x 2-1/2 right hand dovetail router bit is specified for cutting stair stringers to accept stair treads, so its 7 degree angle, 7/8 inch cutting height, and 1/2 inch shank all support this joinery pattern. When a staircase layout is planned around this dovetail profile, this bit shapes the matching stringer grooves for consistent tread engagement. For cabinet joinery tasks that can use a 7/8 inch diameter dovetail profile, the same geometry can be applied wherever that size and angle are appropriate.