I know it's off topic, but some of you guys are really inventive. Besides, it does have some stuff about electric motors. By the way. What's the typical rpm of a modern powerful cordless drill motor? One of mine appears to be somewhere between 9,000 and 10,000 rpm.
Here's the project. See my big wheel skates.
I've used a roller in various ways before. The following configuration that didn't require bearings (unless you consider misalignment) was the most encouraging. The ride felt good and propelled me at almost 18 mph. I posted about it before.
(An ultrasmall ultralight motor would be wonderful, but that's a different subject.)
Something I haven't considered in other efforts when using bearings to hold the roller pressed against the wheel is the rpm of the motor versus the maximum rpm of the bearings. Ordinary skate wheel bearings are plentiful here and I like to use them, but apparently they max out at much less than a typical cordless drill motor that spins at maybe about 10,000 rpm.
Apparently what I need is something like an ordinary 608 ball bearing, but able to handle at least 10,000 rpm with maybe 40 pounds of downward/radial pressure on the bearing. Any bearing less than two inches in diameter is okay.
Discussion, suggestions, and keywords appreciated.
Thank you.