Whe i screw my shutter back it goes straight then at the end it tilts , but when i tighten it abit it goes back straight. The axel does not look stripped, idk if its hard screwing back on the shutter.
Is it really hard to unscrew the Shutter? And also very difficult to screw it back together again?
Because if it is, this is what might be wrong>
Think of the bearing as a âconstantâ. It is perfectly flat at the inner casing. The outer casing(the part the string rides on, never touches the yo-yo halvesâŚ. If it did, your yo-yo would not spin very long.
Now, think of the bearing seats. The slightly projected rings that the bearing tightens up to. Consider them flat and square in relationship to each other half.
If the axle is straight⌠and the seats are flat and evenâŚ. And the bearing contact surfaces are flat, then when you tighten the yo-yo together, all the parts are pulled in square to each other and the yo-yo shouldnât look or spin the least bit crooked.
Now that being said or over-explained, depending on your knowledge of yo-yos, consider this>
The small tube the yo-yo bearing slips on to(the core projection/or seat post) can fit three different ways: 1.correctly(when there is no side slop and you can put on and take off the bearing with your fingers⌠2. The bearing is very easy to put on the yo-yo half, it actually has a little side play, which might or might not affect functionâŚ. And 3. The bearing has to be PUSHED down into the yo-yo half and the fit is so tight, if you look at the yo-yo half before you even try screwing it together, the bearing will look slightly tilted.
If the seat posts are very tight, as you screw the yo-yo halves together, they may not be or look square, until you tighten the halves sufficiently until all the parts are âpulled square to each other.
As you tighten the yo-yo until it feels like any tighter may âbreak something, then the bearing and both halves are as square to each other as they will ever get.
With. O string on the yo-yo, roll the yo-yo across a granite countertop or a glass table top. Watch it from the gap view and see if it rolls straight and true?
When you attempt to unscrew the yo-yo, does it feel like itâs eating itself alive because it is so tight? Once the yo-yo halves are apart, is the bearing stuck bad enough you canât remove it?
The entire point is simple. If the seat posts are very tight(machined tight or anodize build up, etc.) the bearing will be jamming against the post and âwillâ look kinda tilted until you give it the final twist and pull the parts together.
PS⌠consider a little abstract imagery to rationalize this in your mind>
You have a new bookshelf. You decide to get all your favorite books and put them on the middle shelf. But you donât yet have enough books to fill that middle shelf from end to end. So the books just kinda lean against each other. Some sit straight up and others tilt as the lean against the thicker, heavier books.
Once you have enough books to fill that shelf completely, without enough room for even one more book, all the books will be pulled into square and look perfectly vertical.
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Is the Shutter new? Is it the factory bearing?
By design, YYF has some incredibly tight bearing seats. If it is indeed what Doc explains, before you even try and screw the second half in, look at the bearing as you have placed it on the first halfâŚ. It might not be laying flat. Sometimes you can press it all the way on with your fingers and other times I will flip it over and use a hard surface to completely get it set in place. This should loosen with time.
As Doc is explaining, as you screw the two halfâs together the bearing is making its way onto the bearing post, squaring itself until finally seated properly.
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Keep in mind that this also may be rough on your axle or, more likely, the aluminum threads in the yoyo half since itâs side-loading the axle for a bit which could prematurely wear out the threads.
Take a little flashlight and inspect the threads in the axle hole, as well as the threads in the axle itself for irregularities, damage or metal bits that ought not be there.
Also, whenever I screw a yoyo together I like to âsetâ the threads by turning the halves in reverse gently until I feel the threads âdrop inâ or line up. Simeone else can probably explain this better but it seems to prevent cross-threading.
Ivan
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Itâs a new Shutter, now I think itâs the two halfâs trying to square each other, but will it wear the axel and the internals?
But will it damage the thread internal and the axel?
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Or is it normal?
This is normal for YYF. You might hear some call it a death grip. Every mfg is a little different. Different bearing too can be tighter than others.
But Yes, itâs definitely inducing some stresses while itâs going together. Probably best to get the bearing seated all the way before you screw that halfâs together. Just flip it over and use a hard surface to get it all the way on.
Again, the bearing post will ware over time and youâll start to see some raw aluminum but the bearing will start to get easier to install.
GL! Shutter rules!! 
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Can confirm, have had a lot of YYF yoyos where the bearing was seemingly glued on and made some horrific screeching noises going back together. This is good advice, I now always pop the bearing on completely to yoyos that have tight bearing posts, and then chuck the half in the freezer when I need to get it off again. Still will be some awkwardness though getting the halves together.
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I like to put a needle-point of bearing lube onto the bearing post to prevent the squeaking.
Ivan
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