I’m curious how much weight variance there is in yo-yos from the factory. Take the Skyva family, as an example. Per the YYE stats on each page:
Plastic
Delrin
6061
7075
Weight
65.8g
67.2g
64.2g
66.2g
I am assuming these weights include the yo-yo proper (two halves, axle, bearing) but NOT a string.
I like the Skyva, so I happen to have each one of these! What happens when I measure them on my (finally reasonably accurate) gram scale I got for $10 off Amazon?
Plastic
Delrin
6061
7075
Weight
66.7g
67.5g
65.0g
66.7g
these are quite different in some cases. Granted my sample size is ONE, but these are the differences I measured:
Plastic
Delrin
6061
7075
Weight
0.9g
0.3g
0.8g
0.5g
That made me wonder. What about the same yo-yo? I happen to have a bunch of standard Shutters courtesy @smonuts so let’s see if those vary much by weight. These are all solid color Shutters
1
2
3
4
5
6
Weight
64.58g
64.59g
64.55g
64.42g
64.56g
64.52g
I have one fade Shutter as well, it is 64.66g
Bearing in mind the scale is accurate to ±0.03g, I would say all the solid color Shutters are indeed the same weight. Maybe splashes and fades add a tiny bit of weight due to the extra anodization layers?
They indeed seem consistent with each other but not so much what the store pages say they are supposed to weigh.
For example if you bought a plastic or 6061 skyva, you’ll get something almost 1g heavier than what the store said it should weigh… at least based on my measurements!
(I would also assume there is more weight variance in plastic and delrin models than metal?)
Within 1 gram doesn’t seem accurate enough to me, at least for metal.
Maybe what happens is there are differences in weights between batches of metal yo-yos? As in, one made in 2015 versus one made in 2016 (from a different machine or factory?) would vary somewhat, even if it’s the same exact yoyo in shape and dimension and material?
I don’t recall ever having a yoyo that was more than half a gram difference(not even sure if I’ve ever measured one that was half a gram difference) from the listed weight when I weighed them
I agree that that’s a pretty big difference from factory specs to actual measurement.
I don’t see why weight should vary each “batch” either. One would assume that the programming of the CNC mill would be exactly the same, so it would have to be a difference in density/weight in the starting material (aluminum, titanium, etc ). That seems unlikely, but maybe possible? The manufacturer may have difference I. Their “batches” of alloys, ores, or whatever the hell they use to forge the metals.
I wonder what it is that would produce such significant differences though.
I also have an … unusual… number of OneDrop Deep States. Let’s see what they weigh. This time for additional spiciness I will dissasemble them, remove the side effects + bearing, and weigh each half independently.
monkeyfinger ano 1
23.33g, 23.25g
monkeyfinger ano 2
23.24g, 23.28g
solid 1
23.20g, 23.17g
solid 2
23.23g, 23.25g
saturday market
23.11g, 23.13g
splash
23.14g, 23.10g
acid wash
23.19g, 23.15g
copper (new in box)
23.97g, 24.04g
nickel half-swap (with patina)
23.75g
copper half-swap (with patina)
24.35g
It does look like copper coating (and probably nickel too) adds about a gram per half, so maybe ~1.5g heavier in total?
I should have some solids to test in a bit, I’m doubting they’ll be any different than the splash or acid wash results.
Go to El Pollo Chicken and buy 5 loco salads from the dollar menu. Count the number of pieces of each ingredient and also weigh each salad right there on the table. To make sure they are the same.
Go to in and out and buy 6 vanilla shakes. Place a straw dead vertical in the first shake. Mark the fluid line at the straw with a Sharpie. Then check the other 5 for consistency before I call my Lawyer.
Line up each yoyo model I have at least 6 of. Then weigh each one and find it somewhat of concern; that they may weigh in at possibly 1/4 of a gram different. And ponder why such things can happen? And seriously consider that very slight weight discrepancies may inflict irreversible damage to the Reputation of the Makers that allow this kinda stuff to transpire.
Much to doc’s chagrin, I have updated my post with 3 more Deep States (two of them were for a half swap I am giving to two friends). I feel like I have enough data points to be confident now on that model.
Which is kind of a jerk thing to say, anyhow… but people being jerks has never stopped me from doing what I enjoy, and today ain’t no different in that regard.
these are quite different in some cases. Granted my sample size is ONE, but these are the differences I measured:
I will dissasemble them, remove the side effects + bearing, and weigh each half independently.
