Bosch roundover router bit is a profiling router bit designed to cut smooth, uniformly rounded edges on workpieces. The bit has a 1/16 inch radius, so it produces a small, precise round on corners that helps break sharp edges without removing too much material. With a 1/4 inch shank diameter, it fits routers that accept 1/4 inch shank bits, supporting common compact and mid-size router setups. The 5/8 inch cutting diameter concentrates the cut close to the edge, which helps when working on narrow stock or detail work. Overall length is 1-3/4 inches, which suits typical router collet engagement while leaving usable projection for edge profiling. A lower depth setting produces a rounded corner with a decorative bead, letting the same bit handle plain roundovers or a beaded detail depending on how deep it is set.
This router bit uses a 1/4 inch shank diameter, so it fits routers and collets sized for 1/4 inch shank bits and supports common trim and light-duty routing setups. The 1-3/4 inch length allows typical collet engagement while leaving enough bit exposed to reach the work edge, which matters when setting up for consistent profiles along longer runs. Its 5/8 inch diameter cutting head stays close to the edge, helping the bit track along straight or curved edges without reaching far into the panel. A lower depth setting creates a rounded corner with a decorative bead, so depth adjustment directly controls whether the edge reads as a simple roundover or a beaded profile.
This Bosch roundover router bit belongs to the profiling product class, so it is intended for shaping and finishing edges on woodworking projects. The 1/16 inch radius is well suited to light edge breaking on parts where a crisp but safe edge is needed, such as cabinet doors, drawer fronts, and trim details. Its 5/8 inch diameter keeps the cutting path tight to the corner, which helps maintain control on narrow rails, face frames, or small moldings that do not support larger bits. With the 1/4 inch shank diameter, the bit can be used in compact and trim routers for on-site work or shop-based production, which supports tasks where lighter tools are preferred. The 1-3/4 inch length works for common edge profiling passes on assembled pieces or parts before assembly, giving flexibility in when profiles are cut during a build.
The bit is described as producing a rounded corner with a decorative bead at a lower depth setting, so depth control is central to how the edge looks. Set shallow, the 1/16 inch radius primarily softens the corner, providing a modest roundover that keeps join lines and profiles looking crisp. As the depth setting is lowered, more of the cutting profile engages the work, forming both the roundover and the decorative bead in one pass, which saves a separate profiling step. Because the bit creates smooth, uniformly rounded edges, consistent depth settings help repeat the same appearance across multiple parts or runs. The combination of 1/16 inch radius and 5/8 inch diameter supports controlled passes that develop the full shape of the roundover or bead without requiring excessive material removal.
The Bosch 85289M router bit creates smooth, uniformly rounded edges with a 1/16 inch radius, which softens sharp corners while keeping the profile subtle.
The Bosch 85289M router bit at a lower depth setting produces a rounded corner with a decorative bead, allowing either a plain roundover or a beaded edge.
The Bosch 85289M router bit has a 1/4 inch shank diameter, so it works with router collets sized for 1/4 inch shank bits.
The Bosch 85289M router bit 1/16 inch radius eases sharp edges on cabinet doors and trim while maintaining a tight, crisp profile line.
The Bosch 85289M router bit 5/8 inch diameter keeps the cut close to the corner, which helps control passes along narrow rails or small components.
The Bosch 85289M router bit overall length of 1-3/4 inches supports normal collet engagement while leaving enough projection for edge profiling.
The Bosch roundover router bit with 1/16 inch radius, 5/8 inch diameter, and 1-3/4 inch length provides a compact profiling option for smooth, uniformly rounded edges. Its 1/4 inch shank diameter suits routers built for 1/4 inch shank tooling, aligning with many trim and shop routers. A lower depth setting that produces a rounded corner with a decorative bead lets one bit handle both subtle roundovers and more decorative edges. For projects needing controlled edge breaks or small beads, this bit gives a defined geometry that can be repeated across multiple parts.
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