I made the world's LIGHTEST *Speedcube*

hey guys and welcome back to z3 cubing this is the world's lightest group oh come on okay guys we have a problem a little while back i took a cheap dollar store 3x3 and turned it into this ridiculously light rubik's cube at just 30 grams this cube took nearly 10 hours of meticulous cutting and sanding and it was especially difficult because the cheap plastic would just fall apart under the tiniest stress i was kind of able to show it off in a fully functional state by the end of the last video but since then it's continued to break multiple times despite me hardly even touching it what you just saw there was me just trying to use the same amount of force i would on any other cube so today it's time to make not just the world's lightest rubik's cube like this one that didn't even have stickers and falls apart when you barely try to turn it no today i'm gonna make the world's lightest speed cube a puzzle that's just as light or hopefully even lighter than before and one that turns so well that you can actually speed solve on it but let's back up a minute to get some perspective as i've mentioned before a standard rubik's brand 3x3 weighs about 100 grams in comparison the lightest magnetic speed cube on the market the gan11m pro weighs just 63 grams and my q from the last video rest in peace weighed just over 30 grams so that'll be our target for this video and on the topic of requirements everything i said in the last video still applies the cube has to be fully functional it has to be a standard size of around 55 or 57 millimeters and the structure of the cube has to be made entirely out of plastic rather than something like paper we'll get to that in another video i'm adding in the fourth requirement that the cube must be speed solvable that means the performance and durability must be good enough to solve it in say 20 or 30 seconds at most also of course it needs to have colored sides so you can actually solve it in the first place unlike the cube from my last video which i never ended up sticking now this is the exact model of cube i used in the last video to make these pieces clearly it was not the best choice it's incredibly cheap with terrible turning and the quality of the plastic is so bad that the pieces just broke constantly as i modded them its initial weight was 67 grams which really isn't that bad but it still could get a lot better the best possible choice just might be the 63 gram gan11m pro but even if i had the money i don't think i could bring myself to mutilate a 65 dollar speed queue so that's where this cube comes in the brand new diane guhong v4m this 3x3 weighs an impressive 65 grams almost on par with the 11m pro now the interesting thing is that this cube uses a traditional screw and spring structure in its core which is a lot heavier than the style used in the 11m pro this is actually a great thing for us because it means that there's a lot more weight that we can potentially remove from this cube than there would be from this one it might actually end up lighter than the 11m pro this cube also has magnets which means even more weight savings once we take them out it's stickerless we won't have to waste time later adding custom cut stickers and best of all it's only 15 it's still gonna hurt a little to make the first cuts into what's actually a really impressive turning speed speedcube but i guess i'll just buy another one from thecubicle.com check out the link in the description and use discount code z3 cubing to get five percent off anything from their store you know what let's just commit to doing this modification on this cube right about now there we go no going back now uh anyway to begin the modification as i alluded to earlier first let's figure out how to get the core as light as possible and by core i just mean everything used to hold the six center pieces together typically a plastic core piece six springs and six screws we're not including the center pieces themselves because we'll be modifying those later now in the last video we actually eliminated all of the metal components and got our core down to a weight of just 1.4 grams again minus the centerpieces unfortunately though i fear these pieces are far too fragile to stand up to the stresses of speedcubing plus there are no springs which are a pretty necessary component if you want decent performance fortunately there are some cube companies out there like gan who have been working for years to reduce the weight and complexity of their cores so to start let's just take this cube apart see how much the four pieces weigh and then we can take a look inside of some other 3x3s to try and find the lightest possible option okay disassembly complete also this is genius a little plastic washer in between the screw and spring to reduce spring noise how come no one thought of that sooner anyway let's get the scale back out again stick all the screws and springs on there and the core piece and the grand total is 6.21 grams that's actually a little bit lighter than i thought it would be anyway the next step is to take the core of another really light cube like the 11m pro take that apart and see how much it weighs but the problem is the 11m pro isn't actually the lightest core that i know of because it actually has these cool little core magnets in them instead the lightest core that i have is in the gan xs which is pretty much exactly the same as the 11m pro except minus those core magnets so i think that this is actually the lightest option that i know of so let's get started so these are all the pieces that make up the core on the gan xs so let's put them on the scale here and see how much they all weigh and we got a total of 6.97 grams okay that's actually more than the pieces on the guhan which is kind of crazy this was not what i was expecting so i'm gonna have to think of something else uh give me a minute okay i think i have a pretty decent plan first we are gonna be using the gan core because at under 2 grams i think it's the lightest option that's still going to be able to hold up to speed cubing second if we go ahead and take a look at the center pieces of the guhong as well as the xs you can see there's a bunch of extra plastic in the middle of the guhong piece where it should just be empty space to be able to work with this core and so that means that we're gonna have to cut out all that extra plastic which is a good thing for us because we can save some more weight third if you go ahead and look at the hole in the center piece you can see that it kind of has this key design so it'll only come off if those notches are lined up perfectly with the core and so that of course means that if we want to get the core onto the centerpiece in the first place we got to make those notches on this guhong centerpiece and we also have to enlarge the hole a little bit because these stalks are a little bit bigger than the default hole and finally since we've already found that using these stock bulky spring pieces actually hurts in terms of weight more than it helps my idea is that we just make our own so basically once we got the centerpiece all modified we will stick it onto the core like this and then we will take a spring stick that onto the core as well now all we need is something to hold the spring into place i think these little blue pieces that come with the cube should work so we just stick that on there and turn it and there we go it's locked into place and we have a perfect improvised core mechanism that's going to be a lot lighter than either of the other two options of course the center piece doesn't quite flex as much as we need it to but i think if we just cut down this blue piece it should work so real quick let's get out the scale and see how much all these pieces will weigh so we need the core itself we need a spring we need the five other springs and we need the six plastic pieces and there we go 3.18 and as easy as that we're already down to about half of our original weight it'll be even less once we shave down the plastic so let's get [Music] modding [Music] so here are the modified guhong centerpieces the modified blue gan pieces the stock guhong springs as well as the gan core so as you can see inside of these center pieces we have removed most of the plastic and created this little notched hole so that it should fit perfectly right on the core so now all we gotta do is add a spring right on top just like this and then we take one of these little blue pieces and stick that right on top too to lock it into place and now we have a fully functional centerpiece that works just as well as it would with any other core as you can see it's able to spin and stretch and hopefully this radius here will be just about the same as on the original guhong but there's only one way to find out and that is by assembling the rest of the cube while the cube fits together fine which is a relief and it does seem to be able to turn which is awesome unfortunately at the current moment it is hilariously loose and if i try and do an algorithm or anything it'll just explode i think the reason behind this is that i vastly overestimated the amount i needed to trim down these blue pieces it turns out we didn't need nearly as much extra space as i thought we would so i guess we can just go back to these original dark blue pieces that came with the cube and there we go that is a lot better it did cost us a little bit of weight but i would definitely be confident speed solving on this cube now and speaking of weight let's go ahead and check out how much this cube weighs now 60.46 grams that is already lighter than any magnetic speed cube on the market even the gain 11m pro so now that we've achieved that let's just go full remove all the plastic style like we did in last video and see how much more weight we can remove let's start the time lapse [Music] alrighty guys here are the pieces of the goo hong finally finished and when i say finally i really mean it because that time lapse was over 12 hours of real time yes i spent about an entire day of my time just cutting and sanding these pieces and on the one hand i am kind of surprised that it took so much longer than last time by the way only a few pieces actually broke so i just put it back together and i'm keeping it in this box now and that's because i didn't have to deal with the fragile plastic this time in fact none of these pieces actually broke in the process despite the pretty thin plastic but i guess on the other hand there are a lot more pieces because they're split up into these little stickerless parts and so yeah i guess in the end i did have to individually sand a lot more pieces but anyway let's just go ahead and get it assembled and see how much it weighs alright so here is the finished cube now i will mention that these little blue pieces that hold the core together which i have actually painted black the first time i tried putting it together it seemed to make the cube a little bit too tight with all the plastic cut out so i actually tried using these cut down light blue ones but that seemed to just make the cube too loose so i actually cut down these black ones just a little bit not as much as the light blue ones but that seems to work a little bit better so let's do some first turns and that is incredible not only that a cube can look like this but also be fully functional at the same time it definitely is a little bit catchy on the inside it doesn't turn quite as well as i might have hoped definitely a lot worse than the original guhong before but it still is manageable i mean i don't really feel like finger tricking it i feel like that might kind of break something but i guess it is doable like i can kind of increase my speed like this and everything seems to be holding together just fine so now that the cube is all scrambled up let's go ahead and do some inspection and then we can do a quick solve and see how fast i can solve this thing so let's begin in three two one and go uh yeah anyway i still am definitely a little bit worried about this cube just holding together in the first place but yeah the plastic definitely seems to be a lot less fragile than the last one that i made i mean i guess the guhong is a lot higher quality than a cheap dollar store cube uh but even with the holes punch in it even though it was pretty thin plastic to begin with i mean it seems to be holding together the turning quality i wasn't so impressed with but i mean it seems to be at least moderately speed solvable that was probably around 30 seconds there i think i could probably get down closer to like 20 or 25 seconds if i really practiced with this thing but i mean if we're talking about a speed cube that literally has over half of the plastic removed i think this is about the best you can get but now it's time for the moment of truth how much does this thing weigh will it be less than the original one we made at just over 30 grams can we get down into the 20s i mean it sure feels pretty light let's find out 27.38 grams that is incredible okay so we not only managed to get a fully functional rubik's cube down to less than half of the weight of the lightest magnetic speed cube on the market the gan11m pro we not only managed to make it speed cubable which was our goal but we also managed to get another three grams lighter than before this is just amazing but yeah this is a huge relief for me seeing that my last 12 hours of work has paid off seeing that this cube is sort of speed solvable it looks really really cool and of course it's only 27 grams this thing is just light as a feather but yeah i really hope you all enjoyed this video let me know by hitting the like button and also let me know down in the comments what kind of other crazy mods like this do you want to see me do in the future anyway that's pretty much it and i'll see you guys next time [Music] you

Channel: Z3Cubing

Views: 5,027,845

Keywords: rubiks cube, rubiks, cube, cubing, cubes, puzzle, puzzle cube, magic puzzle, magic cube

Id: REo2wCTHNuY

Length: 12min 31sec (751 seconds)

Published: Sat Dec 19 2020