# Out of curiosity....
**URL:** https://forums.yoyoexpert.com/t/out-of-curiosity/80418
**Category:** General Yo-Yo
**Created:** [May 11, 2016, 12:40pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418 "2016-05-11T12:40:47Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@ShockFaktor](https://forums.yoyoexpert.com/u/ShockFaktor)
#### Post date: [May 11, 2016, 12:40pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/1 "2016-05-11T12:40:47Z")
Might be a silly question but would a SideEffect yoyo equipped with brass side effects be considered a “bi-metal” yoyo since it’s main purpose is as a weight system?
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### Author:  [@French](https://forums.yoyoexpert.com/u/French)
#### Post date: [May 11, 2016, 1:55pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/2 "2016-05-11T13:55:14Z")
Funny you should ask, I had a similar conversation last week. We decided that technically a yoyo that has 2 different metals as part of the yoyo body (not including bearing or steel axle) is a bi metal by definition. However, in the yoyo world, bi metal implies weight rings to help improve spin time without making the whole yoyo heavy.
My personal feeling is the weight of the brass side effects is noticeable, but, it is hub weight, not rim weight. I’m not sure the brass side effects extend spin at all over the Aluminium side effects on my MarkMont. Classic. However, the yoyo plays more relaxed and slower with the brass.
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### Author:  [@Kristiawan](https://forums.yoyoexpert.com/u/Kristiawan)
#### Post date: [May 11, 2016, 4:07pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/3 "2016-05-11T16:07:50Z")
Interesting, but I consider side effect as an option part, I think bi-metal yoyo is more like to make a single, individual yoyo part using two different metal, and not to be taken apart.
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### Author:  [@DarkStar3](https://forums.yoyoexpert.com/u/DarkStar3)
#### Post date: [May 11, 2016, 4:32pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/4 "2016-05-11T16:32:03Z")
This is a really good question to which I have to say I have no idea. I feel it’s like a yes and no. While there’s 2 medals the side effects can be taken out make it a singe metal yoyo. So yes it’s technically a bi metal but no because the side effects can be taken out where bi metal yoyos dont have that ability.
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### Author:  [@Zorro](https://forums.yoyoexpert.com/u/Zorro)
#### Post date: [May 11, 2016, 4:33pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/5 "2016-05-11T16:33:29Z")
Aren’t all SEs made of steel or is that wrong?
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### Author:  [@Zorro](https://forums.yoyoexpert.com/u/Zorro)
#### Post date: [May 11, 2016, 4:34pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/6 "2016-05-11T16:34:21Z")
Either way, I’ve had that thought before as well, but I decided that you might as well call all yoyos a bimetal because the axle is also made of steel and that is what the Side effect is. It’s just a really cool way to put an axle in a yoyo.
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### Author:  [@NathanC](https://forums.yoyoexpert.com/u/NathanC)
#### Post date: [May 11, 2016, 4:36pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/7 "2016-05-11T16:36:00Z")
> [@Zorro](#):
>
> Aren’t all SEs made of steel or is that wrong?
Completely wrong… Not even in the ballpark.
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### Author:  [@anonyo](https://forums.yoyoexpert.com/u/anonyo)
#### Post date: [May 11, 2016, 5:31pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/8 "2016-05-11T17:31:40Z")
i for myself define that:
Oxygene yoyo with titanium core and alu rims is a bimetal
OD with brass/steel/titan side effects are not bimetal
just a subjective definition, not a rational one. have fun
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### Author:  [@French](https://forums.yoyoexpert.com/u/French)
#### Post date: [May 11, 2016, 5:56pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/9 "2016-05-11T17:56:50Z")
> [@Zorro](#):
>
> Aren’t all SEs made of steel or is that wrong?
I thought they were 7075 aluminium, but, I don’t remember the source of my thinking that.
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### Author:  [@The\_Machinist](https://forums.yoyoexpert.com/u/The_Machinist)
#### Post date: [May 11, 2016, 6:23pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/10 "2016-05-11T18:23:39Z")
SideEffects are either 7075 or brass. I consider BiMetal to mean two metals making up the body of the yoyo. A typical mono-metal will have an aluminum body, a stainless bearing, and an alloy steel axle - I wouldn’t consider that a tri-metal though. We’re working on an Delrin with Ti rings, what the hell do I call that?!?
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### Author:  [@yyfben2.deactivated](https://forums.yoyoexpert.com/u/yyfben2.deactivated)
#### Post date: [May 11, 2016, 6:26pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/11 "2016-05-11T18:26:09Z")
> [@The\_Machinist](#):
>
> We’re working on an Delrin with Ti rings, what the heck do I call that?!?
a good time ;D
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### Author:  [@persson](https://forums.yoyoexpert.com/u/persson)
#### Post date: [May 11, 2016, 6:44pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/12 "2016-05-11T18:44:06Z")
> [@leop999](#):
>
> i for myself define that:
>
> Oxygene yoyo with titanium core and alu rims is a bimetal
>
> OD with brass/steel/titan side effects are not bimetal
>
> just a subjective definition, not a rational one. have fun
never felt this way define a oxygene
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### Author:  [@yoyodoc](https://forums.yoyoexpert.com/u/yoyodoc)
#### Post date: [May 11, 2016, 6:47pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/13 "2016-05-11T18:47:30Z")
[quote=“The\_Machinist,post:10,topic:80418”]
Bi-Polar?
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### Author:  [@yoyodoc](https://forums.yoyoexpert.com/u/yoyodoc)
#### Post date: [May 11, 2016, 6:56pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/14 "2016-05-11T18:56:49Z")
So… Based on a few theories here; a Nobunaga Hideyoshi would then be considered a Quad-metal?
Because if you count the metal axle, the Hideyoshi contains 4 metals😳
Distorting the ‘general understanding’ of what constitutes a Bi-metal, Tri-metal, etc.; is about as silly as thinking you could put a few pieces of pork between two cow pies and calling it a Ham sandwich🤔
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### Author:  [@French](https://forums.yoyoexpert.com/u/French)
#### Post date: [May 11, 2016, 7:15pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/15 "2016-05-11T19:15:53Z")
> [@The\_Machinist](#):
>
> We’re working on an Delrin with Ti rings, what the heck do I call that?!?
I would call that a very cool yoyo!
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### Author:  [@Odercra](https://forums.yoyoexpert.com/u/Odercra)
#### Post date: [May 11, 2016, 7:34pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/16 "2016-05-11T19:34:07Z")
[quote=“The\_Machinist,post:10,topic:80418”]
You could say… It is a plasTIc…
(okay, that was terrible ;D)
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### Author:  [@creature212](https://forums.yoyoexpert.com/u/creature212)
#### Post date: [May 11, 2016, 7:43pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/17 "2016-05-11T19:43:52Z")
> [@](#):
>
> We’re working on an Delrin with Ti rings, what the heck do I call that?!?
> Posted on: Today at 01:56:50 PM Posted by: French
that’s called
[http://i151.photobucket.com/albums/s149/creature212/shut\_up\_and\_take\_my\_money-t2.jpg](http://s151.photobucket.com/user/creature212/media/shut_up_and_take_my_money-t2.jpg.html)
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### Author:  [@ShockFaktor](https://forums.yoyoexpert.com/u/ShockFaktor)
#### Post date: [May 11, 2016, 8:14pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/18 "2016-05-11T20:14:30Z")
Okay so after reading and thinking for a little about this I’m gonna lean more on the side that it would in fact be a bimetal. For one simply because it implements two types of metal in the over all construction of the yoyo body. Brass side effects are way more than just an axle, or an insert pressed into the bearing seat, it’s the entire bearing seat and hub area. And second, the idea of a bimetal is to increase weight but keep the overall mass of the yoyo to a minimum and that’s exactly what a brass side effect would do. MarkMont for example comes with alum and brass eff3cts. Both are the same exact shape and size and design but the denser brass adds much more weight to the yoyo without adding any additional mass. I’m still not convinced that a true “bi metal” ABSOLUTELY has to have the second metal material placed on the rims for it to actually be considered a “bimetal”
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### Author:  [@Lex](https://forums.yoyoexpert.com/u/Lex)
#### Post date: [May 11, 2016, 8:32pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/19 "2016-05-11T20:32:18Z")
> [@ShockFaktor](#):
>
> the denser brass adds much more weight to the yoyo without adding any additional mass.
Just an fyi, I believe you mean volume, not mass as the brass side effects do add mass (hence why they weigh more).
In my opinion, the side effects don’t make the yoyo bi-metal as the term is meant to reference a certain type of yoyo: those with rims of a different material to the body or a weight ring of a different metal than the body. While the side effect yoyos are technically multi-metal yoyos, they aren’t part of the same category as something like a Masamune or Draupnir and so referring to them as bi-metals, is misleading for no reason other than semantics. If someone asked you for a recommendation for a good bi-metal and you told them to try the One Drop 54, I don’t think they would appreciate it.
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### Author:  [@ShockFaktor](https://forums.yoyoexpert.com/u/ShockFaktor)
#### Post date: [May 11, 2016, 8:40pm UTC](https://forums.yoyoexpert.com/t/out-of-curiosity/80418/20 "2016-05-11T20:40:35Z")
> [@Lex](#):
>
> Just an fyi, I believe you mean volume, not mass as the brass side effects do add mass (hence why they weigh more.
Ha yes, stupid me. I did mean volume my mistake friend.
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