# Yoyo CAD & Prototyping Adventures **URL:** \ **Category:** Yo-Yo Mods and Maintenance\ **Created:** [August 7, 2018, 3:40pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547 "2018-08-07T15:40:59Z")\ **Posts on this page:** 20\ **Page:** 36
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [April 20, 2020, 5:01pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/722 "2020-04-20T17:01:43Z")
Which material do you have it set to? 7068 is around 2.85 g/mm^3 The weight sounds right for the drawing you sent earlier. You definitely need to beef up the dimensions! ---
**Author:** ![Legit\_yoyostrings](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/legit_yoyostrings/32/136873_2.png) [@Legit\_yoyostrings](https://forums.yoyoexpert.com/u/Legit_yoyostrings)\ **Post date:** [April 20, 2020, 5:03pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/723 "2020-04-20T17:03:13Z")
right now im making one thats 6061 and the only reason is I cant find 7068 and I don’t want 7075 ---
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [April 20, 2020, 6:36pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/724 "2020-04-20T18:36:06Z")
Make a duplicate of 7075 and adjust the density a bit in the material properties. It’s already really close to 7068. Fusion doesn’t come with 7068 since it’s not a common alloy. ---
**Author:** ![JWaugh](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jwaugh/32/42366_2.png) [@JWaugh](https://forums.yoyoexpert.com/u/JWaugh)\ **Post date:** [April 20, 2020, 7:10pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/725 "2020-04-20T19:10:17Z")
Why don’t you like 7075? ---
**Author:** ![Legit\_yoyostrings](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/legit_yoyostrings/32/136873_2.png) [@Legit\_yoyostrings](https://forums.yoyoexpert.com/u/Legit_yoyostrings)\ **Post date:** [April 20, 2020, 7:23pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/726 "2020-04-20T19:23:31Z")
I dont really know, im kinda going for a SF feel and the cadence is made of 7068 ---
**Author:** ![Legit\_yoyostrings](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/legit_yoyostrings/32/136873_2.png) [@Legit\_yoyostrings](https://forums.yoyoexpert.com/u/Legit_yoyostrings)\ **Post date:** [April 24, 2020, 7:28pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/727 "2020-04-24T19:28:07Z")
here’s a responsive yoyo that I’ve been playing with in cad width: 46mm diameter: 54.5 wight: 46 (around 48 with guts) metal: 6061 ![Screen Shot 2020-04-24 at 1.20.37 PM](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/1/5/3/1533fc4a7a1fa10892c6e66ecdfdd23e085c18e2.jpeg) ![Screen Shot 2020-04-24 at 1.20.30 PM](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/6/0/e/60ef7e46d302cee6963afd6e2d6552ff51aaac9b.jpeg) ---
**Author:** ![Legit\_yoyostrings](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/legit_yoyostrings/32/136873_2.png) [@Legit\_yoyostrings](https://forums.yoyoexpert.com/u/Legit_yoyostrings)\ **Post date:** [April 25, 2020, 1:51pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/728 "2020-04-25T13:51:29Z")
ok so I have a question about bi-metal rims, how tight should they be against the yoyo ---
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [April 25, 2020, 1:53pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/729 "2020-04-25T13:53:11Z")
A yoyo-specific machine shop knows how to create the correct interference fit, so your drawing only needs to have them touching along the same line. That line should be as long as you can manage though so it has a more solid fit. A longer, more correct answer would require calculating the fit from an interference fit table. There’s some talk about that here: [https://blog.misumiusa.com/shaft-hole-tolerances-for-clearance-interference-fits/](https://blog.misumiusa.com/shaft-hole-tolerances-for-clearance-interference-fits/) And here’s an example table for interference fits between steel parts: [Class V Locational Interference Tolerance Chart for Holes and Bolts](https://www.engineersedge.com/class_v.htm) The fit doesn’t need to be particularly strong because there isn’t much torsion between the ring and the aluminum body in a yoyo, like there would be in a power-transmitting shaft. ---
**Author:** ![hobbygod](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobbygod/32/120997_2.png) [@hobbygod](https://forums.yoyoexpert.com/u/hobbygod)\ **Post date:** [April 26, 2020, 10:21pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/730 "2020-04-26T22:21:41Z")
After reading through the ideal responsive yoyo thread, i decided to try and design my own metal responsive. As I have only played a couple modern metal responsives and own none, I decided to take inspiration from a couple different sources of yoyos that I enjoy that are close to this, as well as design cues from others. I wanted the shape to be reminiscent of a torrent or bassalope shape but in the form of a slimline. I tried to make the cup as smooth as possible leading up to a small center spike, having some inspiration from the edgeless there. Also played around with the response groove, tried to make it a flowable response, I think flowable is great and the size of the groove should be able to hold a lot of flowable for a long time. Lastly, for weight, I looked at the weight of the OD deepstate and tried to get my total weight around there. I threw in a C bearing because the knowledge for different sized bearing guts still alludes me, but I would probably try to make this a D bearing. ![The Fulcrum 1](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/7/1/d/71d0105c05f0839a87cae055dcd9c864cd16ba3d.png) ![The Fulcrum 2](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/a/8/a/a8a239344881a4f51ee10dbd40b9649e5ec1c582.png) ![The Fulcrum 3](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/3/8/6/3865d4df603b4370de807949b703b85385737ef9.png) The specs are as follows: 54mm diameter 34mm width 7075 aluminum 4mm gap 10mm axle 51 grams ---
**Author:** ![Legit\_yoyostrings](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/legit_yoyostrings/32/136873_2.png) [@Legit\_yoyostrings](https://forums.yoyoexpert.com/u/Legit_yoyostrings)\ **Post date:** [April 26, 2020, 10:32pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/731 "2020-04-26T22:32:21Z")
what type or bearing and what type of pads are for this design ---
**Author:** ![JWaugh](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jwaugh/32/42366_2.png) [@JWaugh](https://forums.yoyoexpert.com/u/JWaugh)\ **Post date:** [April 26, 2020, 10:37pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/732 "2020-04-26T22:37:56Z")
dude read the post ---
**Author:** ![Legit\_yoyostrings](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/legit_yoyostrings/32/136873_2.png) [@Legit\_yoyostrings](https://forums.yoyoexpert.com/u/Legit_yoyostrings)\ **Post date:** [April 26, 2020, 10:39pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/733 "2020-04-26T22:39:00Z")
oh I should have looked at the top lol ---
**Author:** ![hobbygod](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobbygod/32/120997_2.png) [@hobbygod](https://forums.yoyoexpert.com/u/hobbygod)\ **Post date:** [April 26, 2020, 10:45pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/734 "2020-04-26T22:45:29Z")
C bearing, flowable response. ---
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [April 26, 2020, 10:57pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/735 "2020-04-26T22:57:30Z")
Main thing I’d recommend is making the wall higher for stalls, and of course, shoot for A bearing with a narrower gap than usual. The shape and cup look great though! ---
**Author:** ![hobbygod](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobbygod/32/120997_2.png) [@hobbygod](https://forums.yoyoexpert.com/u/hobbygod)\ **Post date:** [April 26, 2020, 11:07pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/736 "2020-04-26T23:07:52Z")
Def need to figure out the bearing. Trying to design it to be good at what everyone wants as a modern responsive, but also so it can shred some longer combos as well if your technique is tight, which is why the wall is a bit lower, but I could probably make the wall a bit higher as well. ---
**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\ **Post date:** [April 26, 2020, 11:55pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/737 "2020-04-26T23:55:43Z")
I think given it’s a ball bearing design you can get longer combos even with a higher wall if the user is skilled enough at keeping everything lined up. ---
**Author:** ![FourCorner](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/fourcorner/32/122296_2.png) [@FourCorner](https://forums.yoyoexpert.com/u/FourCorner)\ **Post date:** [April 27, 2020, 12:53pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/738 "2020-04-27T12:53:15Z")
I love the shape of this yoyo! ---
**Author:** ![hobbygod](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobbygod/32/120997_2.png) [@hobbygod](https://forums.yoyoexpert.com/u/hobbygod)\ **Post date:** [April 27, 2020, 1:54pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/739 "2020-04-27T13:54:15Z")
Thank you! ---
**Author:** ![hobbygod](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobbygod/32/120997_2.png) [@hobbygod](https://forums.yoyoexpert.com/u/hobbygod)\ **Post date:** [April 27, 2020, 4:17pm UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/740 "2020-04-27T16:17:02Z")
I made the wall about 3mm higher. could probably go a tad higher, but I think its fine now. Red side has the higher wall, blue side is the original side so you can compare. Same weight. ![The Fulcrum higher wall](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/7/4/6/74609c766d01759bed99b01a00d57ec0627161f4.png) I think im gonna keep it with the higher wall, and maybe make another yoyo with the original shape that I had, its a very nice shape. Edit: more pics, even sides this time with the higher wall, and a nice cup shot, because this cup is so dope 🙂 ![The fulcrum higher wall 2](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/5/8/e/58eaf589637dc10a75ab3e0064d621688d405d9f.png) ![The fulcrum higher wall 3](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/f/e/0/fe0869e0fd7b46b7a30fa55dd782c94ae48da72f.png) ---
**Author:** ![anon5341354](https://avatars.discourse-cdn.com/v4/letter/a/3ab097/32.png) [@anon5341354](https://forums.yoyoexpert.com/u/anon5341354)\ **Post date:** [April 28, 2020, 4:16am UTC](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547/741 "2020-04-28T04:16:18Z")
That’s not half bad @hobbygod. It’s pretty close. Can I suggest that you keep the inner walls no lower than 26mm, push a little more weight to the centre if possible and shave it down to under 50g. A 50g wood yoyo that feels perfect can feel like a real thumper in metal. The gap is a little worrisome too, I’d suggest more around the 3mm mark. [Previous page](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547.md?page=35) [Next page](https://forums.yoyoexpert.com/t/yoyo-cad-prototyping-adventures/291547.md?page=37)