Yes, a standard MR85 would be way too narrow for unresponsive play. This design uses a 4mm wide version of the MR85.
I had to have those made for me. The only way it would become more widely available is if other companies use them in their designs and had some produced too.
Yes, the Flying Lemon uses this bearing.
Here it is on top of a C bearing.
If there are any concerns about the longevity of such a small bearing, i have been throwing my lemon solidly for 6 months and there have been zero issues so far.
Something you might be interested in. It’s a small sacrifice in diameter going from 8 mm wide to 9 mm wide but 684 bearings are 4 mm ID 9 mm OD and come in both 2.5 mm width and 4 mm width. Makes them narrower and a little more flexible that A bearings.
I am kicking around early designs for a convertible that uses both widths so you can go responsive and unresponsive.
I had a 20-pack of the 4mm wide 684 delivered last week, but haven’t had a chance to design and print something to use them yet. Didn’t realize there was a 2.5mm narrow option too, good to know!
But wouldn’t Mr. 105 be weaker than Mr. 85?(This is a joke. Please ignore me).
Mr.105 would indeed be weaker than Mr. 85!
Y’all have no idea how happy I am that you understood that reference. I was 95% sure I was just going to sound like an idiot.
what is the best should i use for 3d modeling a yoyo?
Best free CAD softwares would probably be Fusion 360, FreeCAD, or Onshape.
Agreed! A lot of people really like OpenSCAD too, which is syntax based. Personally, of the free options I prefer Fusion 360.
Mini design I’ve been working on (49x45mm, D bearing)
Mega design (62x62)
Really hard to do any aesthetic work at this size. the entire mass ends up being used to get the material out there.
That little D looks sweet! Any definite production plans?
First one looks awesome!
With the wide boi you can always go heavier to get the moi that you’re looking for since it’s proportional to the diameter and width.
the MMOI is already too high, is the thing. Anyhow it’s undercooked and I know it, which is why I posted it here
No production plans for either of these.
What’s the MMOI? Is too high a bad thing?
The moment of inertia is part of mass calculations and it calculates the amount of angular resistance based on the axis. In regards to yoyo designs it can help determine if something will precede or go off plane and out of control easily as well as how it will play compared to another yoyo with known moi. Speaking of moi calculations I haven’t figured out how to get calculations in fusion for multiple bodies like a bi-metal, I always have to transfer it to solidworks, has anyone else had that issue or figured out how to do it.
Sorry I phrased my question poorly, I do know what MMOI is. I was curious what the MMOI for the specific yoyo @MarkD was talking about.
As to your problem I’m not sure. In Onshape I select multiple bodies then click the weight tool for MMOI and weight but I haven’t encountered that problem. I know @MarkD used to use Fusion. Maybe he knows?
20k per half. maybe not too out of the ordinary but it’s higher than any other design i’ve released by a good margin.
