Surface Grinder Wheel Balancer

I needed a grinding wheel balancing jig for my Doall surface grinder. I was looking at machining and welding one up, but this is a much simpler way to make one and it works just as well. Please ignore the multi colors as I was using up the filament I had and figured it will be all black in a couple of months out in the shop anyways. Also before anyone says it, Yes that wheel is all used up. I just used it for designing.

The files for the actual grinding wheel are obviously for my model grinder, but i included them so that you can get an idea of how the wheel is mounted.

First the base gets printed and then i purchased these linear rail from amazon and cut them to fit.

https://www.amazon.ca/SBR12-700MM-Supported-Bearings-Automated-Equipments/dp/B09VC5TJ7Q/ref=sr_1_16?crid=TR0EQLP7M9H6&dib=eyJ2IjoiMSJ9.adaJfn1EPfYLBeZiOTUAt29SOI6qZ5CzH_6bHkd96SHl0kXTgnCQ9GOtbIjWoR4qQbZiiw8ZvtIeJA2RE1HnSZquazRp_scyu-jC9Co0zJxtWRJAvqNy0_joJd5F8r5aFvwNDzL6DoIEBtHDbSlhyBdCoBIAeQ6P5K2nxTSBD9-oiS_PkajgTu1wjQBbn5s2ROcc3Zt8iROXcXu00mNvt7dphNHH5cejHCP-REUCIHzvfdJ4uF9_MoYR-XZ1DwirojqqfxHYUiwvjykfpkHHKER4XR4pKf7squLi2vWPtvc._dUVj1VaHw7G6ZW3w77mzOJVPy1yTStXNnFqenAcw18&dib_tag=se&keywords=linear%2Brails&qid=1709242509&sprefix=linear%2Brails%2Caps%2C118&sr=8-16&th=1

The holes in the top of the base walls are spaces so that they should bolt right on. I used M4 bolts as that was what I had on hand. If you wish to use different ones the Fusion 360 files are included. I made the base higher than it needed to be as I may have other uses for it in the future.

I also made 3 holes in the base that are for adjusting feet which are again M4 bolts because that's what I had. There are feet that I just threaded the bolts into when I had it screwed into the base and epoxied them in place. There are also caps that again i epoxied into place. they are a pretty tight push fit and may work without the epoxy.

I also had some small bubble levels laying around I had left over from another project that I epoxied onto the base so that I could adjust the leveler to prevent the Grinding wheel from rolling off due to gravity.

Once the base is assembled, I took a piece of 5/8" hardened round stock that I had and used it for the center shaft of the wheel adapter. The grinding wheel is mounted onto the center shaft and is held in place with the stop and adapter. again mine are sized for the machine I have but the files are included so it should be a simple matter of adapting it to whatever wheel you have and what you choose for the center shaft.

From here its just a matter of placing the assembled grinding wheel on the center shaft on top of the linear rails and the heavy part of the wheel will roll to the bottom.

I printed everything in PLA with 15% infill no supports were needed, maybe just reorient the parts.