Chair Leg Cap Bumper | Fully Customisable

We need some new things. You know those things that go on the end of the chair things.

 

That was the detailed description I received from my parents. Still easier than the time they asked me to help them solve a Captcha over the phone. 

The beauty of parametric design, though, is that I could just ask them for a rough angle of the chair leg and the diameter—I handily received this as a circumference measurement from a sewing tape, leaving me to return to the trauma of high school maths on my own—and I could essentially just generate it from those two basic dimensions. Whatever criticisms people have of MakerWorld, you can't fault their model customiser interface. It makes life so much easier for those looking for a quick print at the specs they need, in turn reducing the waste from printing incompatible models.

This model has three basic parameters:

1. Diameter: the most important. This is the diameter measurement of the chair leg that the bumper will slide over. A small tolerance is built in automatically but the bumper does need to fit very snugly so you can expect it to be tight. A little smear of dishwashing liquid helps slide it on and will evaporate over time to hold it in place (BMXers will remember this from changing their handlebar grips)
2. Angle: This doesn't need to be absolutely exact. If it's within 10° or so of the actual angle, you're not going to have any problems.
3. Height: This sets the height of the bumper, or how far up the chair leg it extends. The default is adequate unless you have a specific design in mind.
4. Thickness: The thickness of the material. Leave at default if you're unsure. A thicker setting is more robust and stiffer, while a thinner one will have more flexibility, and therefore more grip (though won't be as resilient).

Everything else is automated and there are a few maximum and minimum parameter safeguards in there to prevent the model going full Picasso. My recommended materials for this are SBS and TPU but if you find something else more suitable, upload a photo and let me know how it works out for you.