Expandable Circle Cutting Jig for Router – Large Diameter & Multi-Router Compatible

This expandable jig allows you to cut large diameter circles using a trim router.
Thanks to the T-track system, it can also be used to refine and correct existing circles (for example, truing the edges of wooden clocks or similar round objects).

You can see it in action in the video below.

Router Compatibility

Currently compatible with:

• Makita RT0700 (wide base)
• Makita RT0700 (round base)
• Katsu / clones
• CMT10
• Festool OF1010
• Bosch GKF 600
• Parkside POFA 12V

More router models will be supported in future updates.

Components & Assembly

The jig is composed of:

• router base plate
• end piece
• 2 extensions

The extensions can be printed as needed, making the system virtually infinitely expandable.

Rotation System

Rotation is achieved through a central pivot, fixed with a Ø3 mm wood screw, allowing smooth movement along the T-track and enabling precise circular cuts.

After use, the pivot and screw can be conveniently stored inside the handle with threaded cap.

Safety

Always follow the cutting direction indicated by the arrows on the plate.

Do not move in the opposite direction risk of router kickback.

Hardware Required

• 2x M4 button head screws (12 mm) – plate assembly
• 1x M6 hex bolt (45 mm) – T-track + upper handle
• 1x M6 hex bolt (any length) – T-track + lower knob
• M6 nuts

Printing

• Printable in PLA and PETG or more.
• PETG recommended for better bed adhesion and reduced warping

Support

If you have questions or want to suggest compatibility with other routers, feel free to reach out!

Happy printing and happy making!