How to build a simple domino shaping jig out of 9mm plywood:
- Cut two pieces of plywood the width of the router base and about 30mm longer than the router base lengthwise.
- Locate the edge of the ball bearing of the router bit and then cut a piece of plywood that is as broad as from that point to the opposing side of the router base.
- Measure 22mm away from that point then cut another length the distance from here to the closest edge of the base.
- Glue the pieces together so that you have a channel running through the jig which, when the bit is positioned correctly, the wood blank will meet the bit and round over the corner.
- Using a forstner bit, cut a hole through the jig exactly in the middle, so that when the jig is mounted on the router, the bit is exposed.
- Joint then thickness down an old plank of hardwood, then rip it into 10mm sheets, thickness these down to 8mm then rip these into 2000mm x 22mm x 8mm lengths.
- Feed these badboys into the router jig.
- Tape all these lengths together then bandsaw them into 30mm dominoes ready for your next project.