How to Make Bearings Spin Faster/Freely

How to make ball bearings spin faster or more freely by removing the seals and grease. Of course, the grease is there for reasons: for lubrication, as a sealant against water and dirt, and to reduce heating problems. This is not a good thing to do for skateboards or rollerblades since those involve water and dirt. But this is still useful for many cases. It turns ball bearings into dry bearings.

You'd think that fidget spinners would already have fast bearings but some have reported that this helps with theirs.

WARNING: After rinsing with water, make sure you dry it thoroughly so that it doesn't rust. It would also help further to add lubricating dry graphite powder (see lock stores) after.

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See also these things I've built which use bearings:

555 Timer Chip Music Player for Maker Faire
http://youtu.be/WM1bZgBqDl4

Gyroscopic Precession Demonstrations and Flying Saucer Fun
http://youtu.be/zrAdABFrSlI

Shadow wars/solar site survey Shade Finder tool
http://youtu.be/44NAXcA22Mg

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Music used throughout:
Bicycle Kevin MacLeod (incompetech.com)
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Видео How to Make Bearings Spin Faster/Freely канала RimstarOrg