I recently purchased a Professor Motor brand tire truing machine, and it has been getting heavy use. Heavy enough that I've noticed the mounts for the axle bushings have gotten -- to use the correct technical term -- "wallered out". The axle bushings are no longer well contained -- they can vibrate and wobble.

So I designed repair parts for my machine and printed them out. They are designed to be a close fit to the arms that support the axle, and have a small screw which can be hand-tightened to hold them firmly in place. The clip that holds the axle bushing is designed to be a snap-fit which should prevent the bushing from moving.


The axle is no longer directly over the centerline of the abrasive pads, but is still positioned over the abrasive. In the future I might shorten the axle support arms, but I'll wait on that for a bit to see if it is something I really want to do.
By-the-by, in the background of the photo above you can see my "Slideways Shifter" accessory. A rotating cam shifts the abrasive block side-to-side to help achieve a level surface on the tires. I have sold a few of them already and have a few more in stock. Message me if you have an interest.
I decided to check how much run-out I saw with this new setup. The answer to that is -- dang near none. Watch the video.
So I designed repair parts for my machine and printed them out. They are designed to be a close fit to the arms that support the axle, and have a small screw which can be hand-tightened to hold them firmly in place. The clip that holds the axle bushing is designed to be a snap-fit which should prevent the bushing from moving.
The axle is no longer directly over the centerline of the abrasive pads, but is still positioned over the abrasive. In the future I might shorten the axle support arms, but I'll wait on that for a bit to see if it is something I really want to do.
By-the-by, in the background of the photo above you can see my "Slideways Shifter" accessory. A rotating cam shifts the abrasive block side-to-side to help achieve a level surface on the tires. I have sold a few of them already and have a few more in stock. Message me if you have an interest.
I decided to check how much run-out I saw with this new setup. The answer to that is -- dang near none. Watch the video.
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