dddd
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Haha I’m pretty sure this Rockstar is not made in China…
As for the Skyline, mine is from 2010 before they rereleased a cheap revised version and for the 401k you’re talking about the SpeedDial I think?
I think for an objective review or something it’s fair to criticize based on the stock bearing but for my personal use I only really care about how well it works with the Atmos bearings (if the stock one is bad that is).
dddd
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My experience is that 10 ball fit similarly loose to the Atmos bearings, I just don’t like flats. The average CT that comes on most yoyos is a little bit tighter than those, and then NSK are giga tight.
YYF definitely didn’t have one machine shop they would use back then, so could just be random variance based on that.
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Thank you for the good laugh.
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correct size: .0002" tolerance
correct size (.0002") + tight (0004" - press fit range): .0006" tolerance
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Only reason I can think of to be so insistent about some sort of USA manu supremacy, is to help usa made yoyos hold their value on bst. It’s just not true. The design is what determines how tight a bearing is on the post, not where they were manufactured. 
This is anecdotal but blaming 6061 is ridiculous also. All my turning point yoyos are 6061 and I have had zero issues with the posts on those getting damaged. I use them all the time and open and close them plenty with no problems at all. Kentaro is just a very good yoyo designer and designed a ton of those old yyf yoyos also.
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6061 with proper fit → no issue.
6061 with tight fit → will wear a bit faster than 7000 series aluminum alloys.
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It’s not the design. A post is just a circle. It’s the tolerance, the ability to hold that tolerance and the quality control to only keep the good ones that determines how tight a post is - that’s all manufacturing stuff, not design stuff.
And btw, we are are dealing with a few ten thousandths of an inch difference here - it’s an insane level of tolerance for a toy.
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Every machine shop that does yoyos has extremely tight tolerances. Its the designer who must design for tolerances to achieve a specific fit. As it stands now, most leave the post too large in the file and machine shops will usually fix this to match their unique machining situation, but still have it on the tighter side
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The same manufacturer can produce yoyos at different sizes to account for the tolerance though, correct? The fact that it can be adjusted to a designers preference for how tight they want the bearing on the post to be after the yoyo is produced, is why I called it a design decision.
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Doesn’t od naturally have more wiggle room bc they stick to safer mono designs?
Tolerance is just the amount of variance allowed between each copy they produce.
Yes and designers need to account for that and anno thickness bc darker or more saturated annos do add thickness, and then decide how tight they want the bearings to be on the post.
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In the case where tolerances aren’t so good they literally can’t make a loose fit seat, because then a lot of halves will come out with posts that are too loose to be usable.
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Never mind lol glaze whatever brands you want idgaf y’all gonna just believe whatever you want anyways. Hella Chinese manu is very capable. Smh
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No u
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Can this thread just get locked at this point? No more useful advice for the OP is likely to be shared at this point given the thread has been derailed with this tired debate.
This discussion has been had loads of times on here. I doubt anything new or particularly insightful will be gained from this version.
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Before this gets locked i gotta say yo the tight bearing posts is a design decision and not a tolerance thing bc like y’all pointed out, some brands like yyf, make them all giga tight. Its not like some of the yoyos are super tight and some are super loose. 
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