The tailbone is connected to the skateboard


My daughters found my old skateboard and were playing around with it the other day. I noticed that the plate that protects the back of it for breaking was worn through.

I decided this was an excellent chance to try 1/4" acetal. I scanned in the existing part and traced the outline in Illustrator and placed 3 1/8" holes in the same locations as the old one. I was able to cut through the 1/4" acetal with no issues, it worked great.
It was a bit of a tight fit for the screws, but not too bad. However, the thickness and length of the screws wasn’t quite right.

I decided to modify the piece a bit to make it fit better. I measured the screw heads and then created a new cut/etch file that would give me 0.13" holes and 0.3" etched recesses around those holes. It was a simple shape of two circles and one filled.

I was able to copy and paste it 3 times and zoomed into the piece on the bed to align them which worked well.

I used 3 passes in the end which gave me a nice deep recess that the screw heads could countersink into and reach further through the board to the t-nuts on the other side to actually fasten it.

After that I was able to attach it in place of the old one and the kids are ready to go out and shred again :slight_smile:
(I still need a replacement for one of the screws from the original set that was sheared off)

Weekly Highlights for the week of Dec 25, 2016

The acetal version is going to outlast the original!


Wow, I can’t remember the last time I saw a skate deck with bumpers!
Great to see the zoom-place working accurately enough to do this, and the multi-pass countersink is awesome!


I don’t know about that. Judging by the classic board, the old one lasted @macphee a few decades. :grin:


yes, hopefully it’s not so slick as to prevent actual braking :slight_smile:


If it is, you could always throw in back in the forge and cut some texture into it for added grip.