# delrin
**URL:** https://forums.yoyoexpert.com/t/delrin/46902
**Category:** General Yo-Yo
**Created:** [December 21, 2012, 10:12pm UTC](https://forums.yoyoexpert.com/t/delrin/46902 "2012-12-21T22:12:39Z")
**Posts on this page:** 14
**Page:** 1
### Author:  [@merger3](https://forums.yoyoexpert.com/u/merger3)
#### Post date: [December 21, 2012, 10:12pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/1 "2012-12-21T22:12:39Z")
I searched the forums and didn’t find an answer, so I’ll just ask. what is delrin? I know it’s some kind of plastic, but how does it vary from normal plastic, or even metal?
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### Author:  [@anon12742582](https://forums.yoyoexpert.com/u/anon12742582)
#### Post date: [December 21, 2012, 10:18pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/2 "2012-12-21T22:18:37Z")
It is a higher quality plastic it is more dense
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### Author:  [@Jake\_Elliott](https://forums.yoyoexpert.com/u/Jake_Elliott)
#### Post date: [December 21, 2012, 10:24pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/3 "2012-12-21T22:24:16Z")
Delrin is a very hard, dense, and smooth plastic. It’s a difficult plastic to machine (yes, it’s machined, not injection molded), which is why delrin yoyos tend to be more expensive.
However, Delrin yoyos can play on the same level as metals. Don’t be afraid of them.
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### Author:  [@daniel0731ex](https://forums.yoyoexpert.com/u/daniel0731ex)
#### Post date: [December 21, 2012, 10:33pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/4 "2012-12-21T22:33:31Z")
It’s hype.
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### Author:  [@jhb8426](https://forums.yoyoexpert.com/u/jhb8426)
#### Post date: [December 21, 2012, 10:55pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/5 "2012-12-21T22:55:48Z")
It’s just another polyformaldehyde plastic, which also includes Celcon…
> **[Polyoxymethylene](https://en.wikipedia.org/wiki/Polyoxymethylene)**
>
> Polyoxymethylene (POM), also known as acetal, polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability. Short-chained POM (chain length between 8 and 100 repeating units) is also better known as paraformaldehyde (PFA). As with many other synthetic polymers, polyoxymethylenes are produced by different chemical firms with slightly different formulas and sold as Delrin, Kocetal, Ultraform, PO...
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### Author:  [@Patrick\_M](https://forums.yoyoexpert.com/u/Patrick_M)
#### Post date: [December 21, 2012, 11:15pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/6 "2012-12-21T23:15:31Z")
> [@jhb8426](#):
>
> It’s just another polyformaldehyde plastic, which also includes Celcon…
>
> [Polyoxymethylene - Wikipedia](http://en.wikipedia.org/wiki/Polyoxymethylene)
Pretty good explanation in that article. ‘Delrin’ is just a commercial/product name for a type of plastic. The type of plastic is sold under many names, including ‘Celcon.’ In the yo-yo community, many yo-yos are referred to as ‘Delrin,’ even though they may not necessarily be manufactured of Delrin brand plastic.
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### Author:  [@daniel0731ex](https://forums.yoyoexpert.com/u/daniel0731ex)
#### Post date: [December 21, 2012, 11:19pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/7 "2012-12-21T23:19:16Z")
There _is_ a difference in chemical composition between Celcon and Delrin, though that’s not really what divided them as yoyos.
The Chinese-speaking yoyoing community actually refer to them as “Numerical-control plastic yoyos” instead of “Delrin yoyos”
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### Author:  [@Jake\_Elliott](https://forums.yoyoexpert.com/u/Jake_Elliott)
#### Post date: [December 21, 2012, 11:24pm UTC](https://forums.yoyoexpert.com/t/delrin/46902/8 "2012-12-21T23:24:18Z")
Celcon and Delrin aren’t exactly the same plastic. Celcon is injection molded, where as Delrin is machined. Of course, injection molding is not as precise as machining, meaning that Delrin yoyos tend to be higher quality than their Celcon counterparts.
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### Author:  [@anonyo](https://forums.yoyoexpert.com/u/anonyo)
#### Post date: [December 22, 2012, 1:02am UTC](https://forums.yoyoexpert.com/t/delrin/46902/9 "2012-12-22T01:02:35Z")
> [@Jake Elliott](#):
>
> Celcon and Delrin aren’t exactly the same plastic. Celcon is injection molded, where as Delrin is machined. Of course, injection molding is not as precise as machining, meaning that Delrin yoyos tend to be higher quality than their Celcon counterparts.
This becomes very apparent when you have both celcon and delrin yoyos available to you at the same time. I agree. Delrin yoyos feel much higher quality than celcon. But properly done, celcon, delrin and metal can all be used to make amazing yoyos.
The Trigger kind of bridges the celon/Delrin gap. It’s celcon, it’s injection molded, but I think it’s over-molded(thicker and larger than it should be) so the rest can be machined for precision construction. The end result is a lower cost product.
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### Author:  [@The\_Machinist](https://forums.yoyoexpert.com/u/The_Machinist)
#### Post date: [December 22, 2012, 4:37am UTC](https://forums.yoyoexpert.com/t/delrin/46902/10 "2012-12-22T04:37:39Z")
> [@merger3](#):
>
> I searched the forums and didn’t find an answer, so I’ll just ask. what is delrin? I know it’s some kind of plastic, but how does it vary from normal plastic, or even metal?
“normal plastic”? Right now there are more than 77,000 varieties of plastic. Not sure which one you’re calling normal.
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### Author:  [@daniel0731ex](https://forums.yoyoexpert.com/u/daniel0731ex)
#### Post date: [December 22, 2012, 4:48am UTC](https://forums.yoyoexpert.com/t/delrin/46902/11 "2012-12-22T04:48:00Z")
> [@The\_Machinist](#):
>
> > [@merger3](#):
> >
> > I searched the forums and didn’t find an answer, so I’ll just ask. what is delrin? I know it’s some kind of plastic, but how does it vary from normal plastic, or even metal?
>
> “normal plastic”? Right now there are more than 77,000 varieties of plastic. Not sure which one you’re calling normal.
No need to be a technical Nazi cat here. You get his point.
But if you must, it’s primarily PC or injection-molded POM.
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### Author:  [@dynikus](https://forums.yoyoexpert.com/u/dynikus)
#### Post date: [December 22, 2012, 4:53am UTC](https://forums.yoyoexpert.com/t/delrin/46902/12 "2012-12-22T04:53:17Z")
> [@Jake Elliott](#):
>
> Celcon and Delrin aren’t exactly the same plastic. Celcon is injection molded, where as Delrin is machined. Of course, injection molding is not as precise as machining, meaning that Delrin yoyos tend to be higher quality than their Celcon counterparts.
celcon and delrin are the exact same thing. They’re different brands of POM. Delrin can be injection molded, it’s just usually machined.
Nevermind that, turns out delrin is a homopolymer, while celcon is a copolymer.
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### Author:  [@daniel0731ex](https://forums.yoyoexpert.com/u/daniel0731ex)
#### Post date: [December 22, 2012, 5:00am UTC](https://forums.yoyoexpert.com/t/delrin/46902/13 "2012-12-22T05:00:04Z")
> [@dynikus](#):
>
> > [@Jake Elliott](#):
> >
> > Celcon and Delrin aren’t exactly the same plastic. Celcon is injection molded, where as Delrin is machined. Of course, injection molding is not as precise as machining, meaning that Delrin yoyos tend to be higher quality than their Celcon counterparts.
>
> celcon and delrin are the exact same thing. They’re different brands of POM. Delrin can be injection molded, it’s just usually machined.
They are _practically_ the same, but not _exactly_. Delrin is homopolymer while Celcon is copolymerized for easier injection molding. The reason for this is due to the dramatic shrinkage that homopolymer POM undergoes during injection molding. The copolymer version still shrinks like hell, though, just a bit more managable.
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### Author:  [@dynikus](https://forums.yoyoexpert.com/u/dynikus)
#### Post date: [December 22, 2012, 5:05am UTC](https://forums.yoyoexpert.com/t/delrin/46902/14 "2012-12-22T05:05:29Z")
> [@daniel0731ex](#):
>
> > [@dynikus](#):
> >
> > > [@Jake Elliott](#):
> > >
> > > Celcon and Delrin aren’t exactly the same plastic. Celcon is injection molded, where as Delrin is machined. Of course, injection molding is not as precise as machining, meaning that Delrin yoyos tend to be higher quality than their Celcon counterparts.
> >
> > celcon and delrin are the exact same thing. They’re different brands of POM. Delrin can be injection molded, it’s just usually machined.
>
> They are _practically_ the same, but not _exactly_. Delrin is homopolymer while Celcon is copolymerized for easier injection molding. The reason for this is due to the dramatic shrinkage that homopolymer POM undergoes during injection molding. The copolymer version still shrinks like heck, though, just a bit more managable.
yeah, I actually found out a few minutes after posting that that they were a little bit different.