Design Handbook - Power Transmissions - Motion Components Page

[toaster-person]

wrote the page on motion components, final draft 4 review. may add section on spacers later if needed :D

there's only 1 commit cause i thought commits were the same as pull requests.

[Revision-0]

Both normal flanged and non-flanged bearings are types of radial bearings, just with a modified outer race in the case of the flanged variety. I'd change some wording and titles to reflect that. https://www.ggbearings.com/en/resources/bearings-resources/faq/what-difference-between-radial-bearings-and-axial-bearings

I'd mention that in terms of reducing friction and supporting load, bearings are most of the time better than bushings, but bushings can gain the upper hand in places that are low speed by being lighter and smaller than bearings.

Your shaft material explanation is a little weird. Most hex shafts are 7075 aluminum, churro is 6061, and large diameter tubes are usually 6061 as well. Steel hex shafts are never great to design for, but works well as swap-in replacements when the aluminum proves to be not strong/rigid enough after you've built the robot.

I would mention as well in the diameter section that most of the strength of a shaft comes from its outer diameter, which is why large hollow tubes are really strength-to-weight efficient.

I would mention somewhere (maybe this goes on the transfer of rotational motion page though) that the farther away from the shaft you transfer the torque, the better it is at transferring that torque (take for example bolting the sprocket directly to the mechanism instead of trying to use a hex shaft and hub to transfer all the torque). I said that poorly but you get the idea.

For shaft retention, I'd include the 2910 2025 tech with the single shaft collar in the middle of a spaced off axle between two bearings with flanges faced to the inside. Take a look at their 2025 climber axles I think.

Overall the page looks really good, thank you!