Disk Sander Circle Jig

My Bandsaw Circle Jig actually started out as an idea for a disk sander jig I saw in one of my woodworking magazines. They used a sliding arm with a screw adjuster to fine tune the diameter of the circle. I thought this was neat and it slowly evolved into the arm I made for my bandsaw jig.

I already had an arm with T-slot track in it from the bandsaw project, so I figured that would get used in both jigs. You could cut on the bandsaw, then fine tune on the disk sander. The construction method I used before applies well here too. 3D print a runner to go in the miter slot, start with a base of 1/4″ MDF, then attach 3/4″ MDF on top to guide the sliding arm. I CA glued the runner in place with it all aligned, and then screwed it in from underneath.

I don’t have any features to keep the adjustment arm locked down because the disk sander’s movement should push the work piece into the table and keep it stable. Hopefully that theory continues to work out for me.

The new thing here is the adjuster. The wood magazine had something with a T-nut and bolt. It was fine, but I figured a printer could do better. The knobs were something I had designed earlier. Each holds a 1/4″-20 coupling nut. The adjustment screw is a bit of threaded rod with a coupling nut bonded to one side. The other was rounded via a drill and bench grinder. The knob will glue on to the nut and the rounded end will push up against a hard stop. Having it rounded should mean there is only point contact and will make for smoother more even adjustment.

The adjuster uses a bolt in the t-track of the adjustment arm to clamp itself down in the rough position. I added a block to the bottom of the jig and bonded a big fender washer down for the head of the adjustment screw to contact. It should be a very firm stop and won’t wear easily.

Putting it all together, and with a few coats of polyurethane to keep the MDF stable, I tested it with another sharpening wheel. My last one was a little small, so I made a new bigger thicker one. The only thing to note is that doing heavy sanding in one spot will load up the paper badly. Sliding down the table occasionally will help even out the wear.

Modular Buffer Stand

While I was building my Anvil Stand I was also building this buffer stand. I love my bench grinder stand to death, and want to have my other grinder setup as a buffer full time. I read about a chisel sharpening technique called unicorn sharpening, and it calls for a buffer. I tried it, and it worked well for me!

I made a basic box shape out of 2x8s (pricey these days) and attached them to a piece of 2×12 left over from the anvil stand as a base.

For the top I made a template out of hard board and labeled it with the orientation and hole info. Every tool base base that goes on top will have two T-Nuts embedded in them so 5/16″ bolts can come up from underneath to attach. That way you are always 2 bolts away from taking a tool off an installing a new one. I keep the template attached to the back of the stand so I can easily add new tools in the future.

Like the bench grinder stand I clad the cavity in plywood and filled it with sand. This shot is of it 2/3rd full, I had to go back to the store and get more sand because of all the filled projects I have been working on.

So I don’t have to go to the toolbox and remember which wrench is the right one every time, I made a palm wrench that fits the bolts. The bottom is rounded to make it easy to rotate in your hand for fast installing, and the outside hex shape lets you get good torque on it. A print like this can be surprisingly strong without any modifications and only 20% infill.

The buffer is all ready to go and looks great. It is weighty and stable while in use. I only have one tool attached now, but might get another grinder or buffer in the future. When I do, I’ll make another base and hang the unused tool off the side or back of the stand. Boiled linseed oil finished everything off.