I’ve been working on My OpenThrow project, one of the most important parts of OpenThrow was to be able to support all styles of yo-yo. Unresponsive, I was able to work out just by getting the bearing seat right. It only had to spin smooth and long. Modern responsive, I just needed a slightly shorter bearing support and my seat was interchangeable between styles.
When I put that c-sized bearing in, what was essentially a raider, it looped almost straight down. If I replace that with loop 360 parts, the sunrise spacer kit I have, it works, you see it in the video.
My question is, what needs to change to make a c-sized bearing work? Is it the diameter of the yo-yo? They didn’t seem that different.
I think your issue is gonna be rpm. Smaller diameter will go more turns per minute faster and unlike unresponsive you don’t need those initial high rpm to last very long with looping. Usually the issue with small bearings on unresponsive is you get nice crisp binds and high initial rpm but it quickly loses steam. However on a responsive throw and loopers you will just regen by the time that high rpm starts to fall off.
No idea how to make that physics equation different. I know larger diameter yoyo only means slower wind. We saw this live with the freshly dirty dinner plate 3d printed yoyo at Indy states. The massive diameter size of a dinner plate resulted in a comically sluggish response with a standard c bearing in a stem system. Literally you do a bind and have to wait 10 seconds for the yoyo to return to your hand.
Maybe change the weight distro to add more to the center weight? No idea how else that will affect the other characteristics but should theoretically help with rpms. Which i agree is probably the problem
Yeah, the dinner plate came to mind. Actually, the dinner plate confirmed something that I had suspected. That yo-yos behave similar to gearing on a bicycle. That is the “ratio” results in more tourque the same way as shifting to a high gear on a bike. So you can get a lot of potential power, like the dinner plate, but you need way more input power to put it down.
Yeah, this was also my thought. The first thing I did, was I had also made my design a sort of silly cylinder shape, so I tapered it more like the loop360 was and made the weight lighter as I didn’t realize I had added 10g. I thought I could move the power band so it didn’t need such a high gearing. This yo-yo does punching bags like nobody’s business, and they punch up, almost annoyingly so. I think the problem is I went from gear ratio 1, to maybe 3 and need to be in gear ratio 30 to have the loops go up.
you will see that to adjust a yoyo to loop more upwards you can shorten the string, widen the gap, or use thinner string. However, using a wider gap or thinner string lessens the response - which is already in trouble with a large bearing. So the last thing you can really tune is to use a smaller bearing design, so you can adjust the rest of the yoyo to work acceptably for looping.
I imagine you could find a sweet spot but commercially that shrinks the tolerance to get decent loops to a point most consumers wouldn’t be able to easily duplicate the required string length and thickness resulting in the need to supply specially sized string just for one YoYo which I don’t see working out. this would also mean you can’t get a c bearing s.o.s as that would add only more complexity for the end user of the product.
Obviously as a tinkering effort it could be a neat project but easiest path for usability is smaller bearing diameter. I wonder if a d bearing would be more viable but I don’t know if the effort to find out is worth it.
Thankfully k bearings like you find in loop 720 are super easy to source as they are a common RC car component.
Oh really? I didn’t know they were “k” I thought they were “a” Interesting I’ll have to check into that. I was into mini-z for a bit but those bearings are WAY too small. I need to get some d-sized to try at least if for no other reason than I would like to have a compatible bearing seat.
Size a Measures 5 x 10 x 4mm, part number MR105 Used in the loop 360 and various simi responsive Duncan throws.
Size b Measures .250 x .375 x .125 (1/4" x 3/8" x 1/8"), part number R168. Used in sunrise loopers and the layer infinity Kasm
Size c Measures .250 x .500 x .187 inches (1/4" x 1/2" x 3/16") or 6.35 x 12.7 x 4.7498mm, part number R188
Size d Measures 5mm x 11mm x 5mm. (0.196" x 0.433" x 0.196"), part number 685
Size e Measures .156" x .312" x .125" (or 3.962 x 7.925 x 3.175mm), part number R155 , Used in raiders and spintastic bearing throws
Size g used in custom products yo-yos Measures .187" x .375" x .125" (3/16" x 3/8" x 1/8") r166
Size I used in Tom Kuhn YoYos Measures .125" x .312" x .140" R133
Size k Measures 4 x 8 x 3mm, part number MR84 , Used in yyf looping yo-yos like the 720, 900, etc and the mighty flea
Mr85 measures 5x8x2.5mm and is used in rbc
there’s a bunch more mostly larger ones for stuff like ilyy and yyj and stuff that’s mostly retired but those are the ones in the small range relevant to the conversation. G is the only one that’s not all that common the rest are pretty readily available and many can be found in rc car shops in a pinch.
Ohh the bearing in the raider is different. I thought they were the same. That might be one to try, I have raiders and I think many people would have them too.
