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Circle, Corner & Flute Cutting

(6 products)

Circle Cutting Jigs and Corner Radius Templates for Router Work

Cutting accurate circles and consistent rounded corners freehand is difficult — even for experienced woodworkers. Circle-cutting jigs and corner radius templates act as guides that constrain the router to a precise arc, producing smooth, repeatable results whether you are cutting tabletops, decorative panels, or cabinet doors with radiused corners.

Circle and Oval Cutters

The Oval Circle Cutter with Vacuum Base uses a vacuum chuck to hold the jig in place without screws or clamps, making it ideal for finished workpieces or situations where you cannot mark the center. The Jasper Pro Circle Making Jig and Milescraft Router Circle Guide Kit pivot from a fixed center pin to cut circles of varying diameters, giving you precise control over the finished size.

Corner Radius Templates

Corner radius templates clamp over the corner of a workpiece to guide the router in a fixed arc. The Kreg Corner Radius Guides and 4-piece Corner Radius Guide Set cover multiple radius sizes so you can match the corner profile to your project's design. The Circle Radius Cutting Template handles both concave and convex arcs in a single tool.

For additional router guidance tools, see the full router jigs and guides collection. Pair with flush trim and pattern router bits for the cleanest arc cuts.

Frequently Asked Questions

What is a circle-cutting jig for a router?

A circle-cutting jig mounts to a router's base plate and pivots around a center pin to guide the bit in a perfect arc. By adjusting the distance from the pivot pin to the bit, you set the radius of the circle to be cut.

What sizes of circles can I cut with these jigs?

The cutting range depends on the specific jig. Pivot-style jigs like the Jasper Pro Circle Making Jig typically cover a wide range of diameters. Check each product listing for the minimum and maximum diameter range supported.

Can I cut a circle without drilling a center hole in my workpiece?

Yes. The Oval Circle Cutter with Vacuum Base uses a vacuum chuck to secure the jig without a center pin, making it suitable for finished panels or surfaces where a center hole would be visible or unwanted.

What router bit should I use with a circle-cutting jig?

A straight or upcut spiral bit is the standard choice for circle cutting because it produces a clean kerf around the arc. A flush trim bit can be used with a template-following approach. See the carbide router bits collection for compatible bit options.

What are corner radius templates used for?

Corner radius templates guide the router in a fixed arc to soften the corners of workpieces such as tabletops, cabinet doors, and drawer fronts. Using a template ensures that all corners on a project are identical, which is difficult to achieve consistently freehand.

How many radius sizes does the 4-piece Corner Radius Guide Set cover?

The 4-piece Corner Radius Guide Set provides four distinct radius options in a single kit, allowing you to choose the corner profile that best suits your project. Check the product listing for the specific radius values.

Can I use these jigs with a plunge router?

Yes. Plunge routers work well with circle-cutting jigs because they allow you to start the cut at full depth inside the workpiece. Fixed-base routers can also be used when making cuts from the edge inward.

Are these jigs compatible with any router brand?

Most circle-cutting jigs use a center pin or attach to a router sub-base and are compatible with most standard routers. Check each product listing to confirm fit. For routing tools and compatible accessories, see the full routing collection.

How do I cut a smooth arc without tearout?

To minimize tearout on arc cuts, move the router in the correct climb-cut or conventional direction for your setup, use a sharp straight or spiral bit, and take multiple light passes to reach full depth rather than one heavy pass. Visit the Infinity Tools blog for routing technique guides.

Does Infinity Tools offer support if I have questions about which jig to choose?

Yes. You can reach the Infinity Tools team through the contact page for product selection advice and compatibility questions.