I picked up an odd variety of Workmate-like portable table a few years back at a Habitat for Humanity Restore, I hadn’t seen one like it before and can’t find another like it now. It has two clamp threads that go forward and back like most Black and Decker Workmates, but it also has side-to-side clamping as well. Sometimes it comes in handy holding oddly shaped items. The front pads do not pivot but the back ones do.
Fun little clamping table with 3/4″ dog holes.
The dog holes on it use all my standard 3/4″ dogs, but what I found is that just clamping front to back between dogs would start to loosen up enough that the work-piece could could shift left and right. To combat that I enlisted the skill of my son to create the model for and 3D print a set of dogs that had big mouths to hold at the corners.
The dog has a 90 degree mouth with a small relief hole at the corner.
The dog prints on its side so that the grain /lines of the print provide strength along the length of the dog where the shear forces are the strongest.
Each face on the dog has a small chamfer ti give it a little downward bite to keep things from shifting up and out.
Chamfered in this direction too. The dog has some bite, and is only 1/4″ thick.
Here the corner dogs hold 3/4″ maple for sanding.
My son did a great job implementing what I described to him. He opensourced the corner dog model here. If you choose to print it, make sure to set it on its side and add supports so that strength of the filament lines run the length of the post.