Weed Trimmer Wheel Assembly

thingiverse

** Note: I have no idea why my STLs and some of the photos are not rendering. I've tried re-uploading a few times with no luck. If anyone has an idea, please reach out. This is a weed trimmer attachment similar to ones they are selling with new models. Mine, however, is a Black and Decker GrassHog XP. I also don't like how cheap the wheels are and so have been thinking about this for a while. You'll need 5/16" all-thread (or similar size in mm) and 2 nuts. I'm including a knob I melted the nuts into. I cut the 5/16" bolt 4 inches long. You'll also need 2 M3 x 25 screws and nuts. To secure the pins, I just cut a paper clip and bend it on both sides of the pin to hold it in place. You'll need 2 knobs, pins and washers, and one of everything else. I printed everything with high infill and 6 wall layers using standard PLA. It might take a little bit effort to work the fork through the clamps, and the all-thread bolt through the fork, wheel and shield. Don't tighten the nuts too hard or the wheel won't spin. The wheel was just a mock up and not complete, and the spokes print separate from the wheel. That is, it is two parts in one. I was planning to design it with bearings, but it works so well as is, I just glued the spokes to the wheel and went with it. The shield is needed if your soil is wet when you trim as the trimmer will throw mud and grass into the wheel and it will lock up.