Alternative bearing removal method


#1

I’ve seen a lot of threads about stuck bearings lately and it got me thinking. After some time, I came up with another method for removing them that seems to work well. I mentioned this on another thread, but I now have pictures and a diagram that explains how it works and why it’s better than the pliers method as a last resort.

First, what is needed? A pair of strong pliers, a 6mm spring pin (see pics), and a stuck bearing (obviously.)

The key difference between this method and others is that the gripping force on the bearing is applied from INSIDE the bearing. This offers a few advantages. First, there is no way the outside of the bearing will get damaged even the smallest bit; so, assuming the bearing survives, there will still be a pristine surface for the string. Second, the griping force pushes outward which actually helps the situation somewhat. Finally, if it came down to this or pliers, this keeps those steel jaws far from your yoyo reducing the chances that you’ll slip and ruin your finish.

This first pic should clarify the idea…

As you can see, the round shape of the spring pin provides another benefit. It applies it’s force in a uniform way on the inside of the bearing. This helps to prevent taking it out-of-round, or making it egg shaped as can happen if force is applied at two points.

The next few pics show the actual process. This wasn’t staged; I have a YYJ speed bearing that gets stuck hard on my shutter EVERY TIME I install it. I learned quickly not to install it, but for this I did it purposely. Also, notice that the pin is hollow (it wouldn’t work otherwise! haha.) There is enough room inside the pin to let it slip over the axle. So, if it happened to be the axle side that was stuck, you wouldn’t have to remove it first as in the 1/4" drill bit method.

Just compress the pin and insert it into the bearing… then release the pin

After a little wiggling and circle motions… POP! off it comes! No pulling strings, freezing yoyos, or using pliers dangerously close to your throw!

Afterward, I installed the bearing back in my DM2 where it fits normally. It played the same as expected. It occurred to me later that if the pin isn’t gripping the bearing strongly enough, there’s a couple things you could try. Using some sandpaper on the end of the pin that goes into the bearing to make it more rough could increase friction during extraction. Also, the pin could be forced open wider after it is inserted into the bearing with the same result.

I’m not sure that this method would work in every case, but I am certain that its worth trying before putting the pliers directly to the bearing. If nothing else, I believe this to be a really good second-to-last resort. If anyone puts this method to use I’d like to hear your story…

Thanks for reading


Useful modification & maintenance guides -- clean, repair, tune, fix yoyos
#2

Nicely done!

Perhaps a pin to the top is in order for the 4 million annual bearing threads.


#3

I agree, that’s a great method, you should make your own kit and sell them on yye for mula lol


#4

What would come in the kit? A single 37¢ spring pin? Haha

And thanks for the props guys!


#5

same as buying a yoyo axle for 3 lol when you can go buy a set screw for .15


#6

You make a strong point.

Bearing removal kits for sale:


#7

Added to: Useful modification and maintenance guides - Clean, repair, tune, fix yoyos

Very nice work.


#8

PM me ill buy one for $20 lol Jk but anyways where would one aquire this? Hardware store? And how do the sizes go on those?


#9

They usually have assortment boxes at hardware stores, but they can be found online also.

Check fastenal.com

There you can search by diameter, length, etc… And you can buy single sizes.

They are sized by diameter and length. So, M6x40mm is 6mm in diameter and 40mm long. SAE sizes are available also. So, 1/8"x1/2" would be common.

The one I used in the pics was a M6x20 I think. Length doesn’t matter so much; diameter is the important spec.


#10

this is pretty clever, cool idea.

Kyle


#11

this didin’t work on my valor although i’m sure it would on most others but my beaing seems to be stick hard i think i might break the bearing to get it off.


#12

This makes so much sense. I really wish I had seen this earlier.