A working journey in bearing modifications

Yo-Yo Mods and Maintenance
1

Updated 12/4

Hi all,

I’ve come to you to note the chronicles of making a customized bearing for any of interest.

Aiming for a hybrid bearing with steel races and nylon cage with ceramic balls.

NEW Information

I have now made a hybrid using 1/16 ZrO2 balls in a magic yoyo bearing which originally spun on a bearing tool for 5-6s out of package now to 17-18s. I have a feeling the tolerances on those races aren’t as good and I think I can achieve better spin times, as the kabo bearing nylon caged steel ball bearing spins on a tool 20-21s with little to no vibration. Next I will be putting Zr02 balls inside of those races with the nylon cage and one with a steel cage swapped from a RCS bearing which will get the nylon cage and Zr02 balls.

Testing has been done by repeated spins set up on a bearing removal tool after the bearing has been cleaned with 91% Isopropyl Alcohol and a compressed air gas canister.

As soon as you add a drop of oil to a clean bearing you will notice an immediate loss of spin time by ~3-4x, if sprayed with air up to high speed removing excess in the process it makes it ~1.5-2x, oil adds friction and deceleration.

Notes:

8 ball size A bearings use 1.2mm balls.
10 ball size C bearings use 1/16" balls.

5 Likes
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Reserved

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Reserved #2

4

Neat do you have to use flats for this or are you able to get different shapes?

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5

I’m using another cheaper bearing with a concave for the race.

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6

Nice I’ve tried and failed at making a groove in a few bearings but reusing a cheap concave race is probably going to work better.

Looking forward to seeing how this progresses. Would be cool to upgrade some cheap magic yoyo bearing to hybrids

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For the nylon cage I’m also using a cheap alternative bearing. I don’t see many yoyo bearings with a nylon cage but it is definitely better than a steel crimped cage.

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8

kinda bold of them. who cares if its empty?! if amazon got paid to deliver an empty box, deliver an empty box! lol ppl are weird

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Eh it’s just my assumption, idk what happened to it actually, but the balls are so small one could think it’s an empty bubble mailer.

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I’ve also had “light” packages disappear lol, watch parts, and bike cable end crimps.

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Updated Bumper