The Festool HW R4-OFK 500 Roundover Cutter is a dedicated roundover router bit for edge routing with Festool OFK-series routers. This is a roundover cutter designed for rounding and finishing edges in plastic and solid wood. Model Number: 490094. If your work is trimming, easing, and finishing exposed edges instead of general-purpose routing, this bit is built for that exact job.

What sets this cutter apart is how purpose-built it is. Festool designed it specifically for the OFK 500 and OFKC 500, and the special hollow shaft cutter fits right on the spindle. In practical terms, that direct fit helps deliver high run-out accuracy, which is what you want when the goal is a smooth, even profile that does not look wavy or inconsistent from one pass to the next.

The cutting geometry is straightforward and job-focused. You get a 27 mm cutting diameter, a 4 mm radius, and a 2-tooth double-bladed cutter design. The two carbide edges are there for longer life, which matters if you do repeated edge treatment on trim, shelving, cabinet parts, or glued edging. Carbide holds up better in regular use, especially when you are moving between different edge materials.

Festool also calls out that the cutter radius is precisely matched to the ball bearing arrangement. That matters because edge routing is only as good as the guidance. When the profile and bearing relationship are right, you spend less time fixing uneven transitions and more time moving through parts. The cutter is also designed with a low installation height thanks to the flush ball bearing mount, which makes it useful when routing in rebates or working on stacked panels where clearance can get tight.

There is another practical detail here that is easy to overlook: the radius transitions into a 5 degree run-out on the router blade to help protect the work surface. For finish work, that is a useful design choice. It helps the edge break cleanly instead of leaving a harsh transition that needs extra sanding or cleanup.

Compatibility is simple and specific. This roundover cutter is for the Festool OFK 500 and Festool OFKC 500. It is not trying to be a universal router bit. That is a good thing if you already own one of those edge routers and want the bit matched to the machine, the spindle interface, and the kind of edge work those tools are made for.

This is a strong fit for cabinet installers, finish carpenters, shop users, and serious DIY woodworkers who want consistent edge easing on visible parts. It also makes sense for anyone routing plastic edging as well as solid wood. If you need one bit to handle general plunge routing jobs, look elsewhere. If you need a dedicated router bit for clean roundovers and edge finishing, this one is built with a clear purpose and does that job well.

Festool HW R4-OFK 500 Roundover Cutter is the right call for dedicated edge work

This is a purpose-built edge router bit for users who want clean, repeatable roundovers on visible parts without fighting setup or profile inconsistency.

• Who it's for: OFK 500 and OFKC 500 owners doing cabinet edging, trim finishing, solid wood edge easing, or plastic edge work.
• Why it stands out: Direct spindle fit, high run-out accuracy, a 4 mm roundover profile, and two carbide cutting edges give it a more specialized feel than a generic roundover bit.
• Worth knowing: This is a dedicated cutter, not a general-use router bit, and it comes without the ball bearing.

• What is this cutter used for? It is used for rounding plastic or solid wood edging and for finishing off solid wood.
• Which routers is it made for? It is designed for the Festool OFK 500 and OFKC 500.
• What size profile does it cut? The cutter has a 4.00 mm radius and a 27.00 mm cutting diameter.
• How many cutting edges does it have? It uses a 2-tooth, Z2 double-cut design.