Batman Joinery – Alder Wood Box

Woodworking

I’m really excited about this box! It started out as a way to create unique joinery. I was playing with basic shapes: circles, squares and such. Nothing was looking quite right, and then I had the epiphany to create a bat-shaped joint. And thus was born: the batman joinery box!

Check out the Batman Joinery build video on YouTube to see me make it.

Downloads

Bits Used

I machined this on my Tormach PCNC 1100; the machine is designed for metal, and the max speed is 5140 RPM, which is rather low for wood. My feeds and speeds are based on this max RPM; I would run different rates for a different machine. I really would love to get a dedicated wood router CNC machine!

Materials

Build Notes

I carefully designed the joints so that I could use my tapered ball tip to do the finishing operation. The joints fit really well together; well enough that they hold together without any glue and have to be pounded apart with a mallet.

The sides needed to be held stable when machining, since they are machined vertically. I clamped a vice to my fixture plate, and then squished the piece between two pieces of plywood also clamped to the piece (as seen in the video). This provided additional support for the pieces.

After cutting the joints, I cut a 1/4″ groove in the bottom for the plywood bottom piece. I did it with two passes on the tablesaw using a 1/8″ kerf blade. The location was about 1/8″ up from the bottom, which missed the end joinery and allowed me to do a full pass.

I initially wanted to emboss the top with the bat logo, but the grain orientation kept letting the bat ears and bat tail break off. After two attempts I decided to just use V-carve Pro and do a traditional engraving at about 1/8″ deep.

In my version I cut the top oversize by 1/8″ on each side. I grooved the bottom edges with a dado set in my tablesaw to provide an indentation for the top to sit. The top of the top was chamfered with a 45 degree bit on the router table; I didn’t take the time to film this, and hopefully it is easy for people to figure out.

It is finished with Osmo oil; two coats.

Leave comments and questions on the YouTube video, or post them here!

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[…] Alder wood with a satin oil finish (Osmo oil). CNC engraved bat logo on the top. Custom bat joinery. More details on my main blog. […]

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