I have a Craftsman T2500 Lawn Tractor and I noticed that the steering was becoming erratic on it. It was gradually getting worse over time. Well I was doing maintenance this week on the tractor and noticed the front left tire was leaning to the left and the tractor was a little lower on that side. Upon inspection of the front tire I noticed that it was only being held on by a clip and two washers and that it was hanging directly on the axel. Well I took the tire off and the bushing was missing. It must of deteriorated over time and just fell out. I went online and they don't just sell the bushing that goes into the center of the tire. You have to buy a whole new tire for around $100. Well I figured I could just print a new one with some flexible filament on my 3D printer. So I measured the cavity of the wheel where the bushing goes and found out that its smaller on one end then the other (a cone shape). I measure the axel and created the bushing.
After printing this you may want to sand the outside and the inside as well. I did mine and then I greased it up and slid it on.
3DSolutech Flexible Filament
I printed at speed 35mm, 100% infill and a temp for my filament of 220. I also used a Brim.
Prep for installation
I sanded the outside and the inside hole for the axel. I then used some grease and greased up the outside and the inside. I banged it into the Wheel to make sure it buts up against the other side of the axel hole in the wheel(See pic).
I then put the tire on and made sure it could spin. It was a little resistant when I first put the wheel on, but after cutting the grass it was fine as it wore in.
I used my caliber to get measurement of axel rod, and then the opening in the tire as well as depth of the bushing area. I noticed that the openings at either end were different and realized it was a cone shape. I measure both ends and design the bushing on Tinkercad