# Delrin and POM **URL:** \ **Category:** General Yo-Yo\ **Created:** [May 30, 2019, 11:13am UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994 "2019-05-30T11:13:32Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![beeebon](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/beeebon/32/30672_2.png) [@beeebon](https://forums.yoyoexpert.com/u/beeebon)\ **Post date:** [May 30, 2019, 11:13am UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/1 "2019-05-30T11:13:32Z")
Are Delrin and POM the same thing? Sorry for the stupid question! ---
**Author:** ![RyoCanCan](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/ryocancan/32/163437_2.png) [@RyoCanCan](https://forums.yoyoexpert.com/u/RyoCanCan)\ **Post date:** [May 30, 2019, 11:19am UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/2 "2019-05-30T11:19:40Z")
> [@Show some plastic yoyos you made](https://forums.yoyoexpert.com/t/show-some-plastic-yoyos-you-made/301570/95): > > [There are some differences, but in most situations the difference is so small it won’t matter.](https://www.lionep.com/uploads/files/Acetal-vs-Delrin.pdf) ---
**Author:** ![YoYoExpertGarrett](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yoyoexpertgarrett/32/1543_2.png) [@YoYoExpertGarrett](https://forums.yoyoexpert.com/u/YoYoExpertGarrett)\ **Post date:** [May 30, 2019, 11:31am UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/3 "2019-05-30T11:31:44Z")
> [@The Google Machine](#): > > Acetal and Delrin® are both engineering plastics more properly known as polyoxymethylene (POM) and are members of the thermoplastics family. POM is available in 2 different resins: Acetal Copolymer (POM-C / Ertacetal C®) and Acetal Homopolymer (POM-H / Ertacetal H®). The latter is commonly referred to as Delrin®. > > Delrin® is a registered trademark of DuPont 😀 ---
**Author:** ![beeebon](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/beeebon/32/30672_2.png) [@beeebon](https://forums.yoyoexpert.com/u/beeebon)\ **Post date:** [May 30, 2019, 11:35am UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/4 "2019-05-30T11:35:15Z")
Thanks 😃 ---
**Author:** ![codinghorror](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/codinghorror/32/8052_2.png) [@codinghorror](https://forums.yoyoexpert.com/u/codinghorror)\ **Post date:** [May 31, 2019, 2:39am UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/5 "2019-05-31T02:39:24Z")
Huh interesting > In most applications, Delrin® and acetal copolymer can be interchanged because many material properties are within approximately 10% of each other. Notably, the most significant difference between Delrin® and copolymer acetal relates to what is commonly known as centerline porosity – an inherent characteristic of Delrin®. It is most prominent in thick slab and large diameter rod stock. Visually, it is clearly evident around the center portion of a rod, which extends down the entire length. In sheet, porosity appears as a line along the center of each cut edge. In some cases, the slab may appear to be laminated or glued together. ---
**Author:** ![noodles](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/noodles/32/36467_2.png) [@noodles](https://forums.yoyoexpert.com/u/noodles)\ **Post date:** [June 1, 2019, 12:46pm UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/6 "2019-06-01T12:46:33Z")
Delrin is a softer plastic that can be machined like aluminium. Since it is softer it does not crack as easily as other plastics, but it does show gashes more readily if you slam it on the ground. POM is kind of the equivalent of non-name-brand Delrin. It is very similar except in most cases (but not all) POM yoyos are molded. Polycarbonate is a harder plastic so it has a greater tendency to crack, but it does not show gashes as much as the other plastics. Delrin and POM are also slightly heavier than Polycarbonate. All are good for yoyos, but for different reasons. ---
**Author:** ![vegabomb](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/vegabomb/32/199_2.png) [@vegabomb](https://forums.yoyoexpert.com/u/vegabomb)\ **Post date:** [June 1, 2019, 6:44pm UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/7 "2019-06-01T18:44:24Z")
> [@noodles](#): > > POM is kind of the equivalent of non-name-brand Delrin. It is very similar except in most cases (but not all) POM yoyos are molded. Delrin _is_ POM. Not kind of. ---
**Author:** ![zslane](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/zslane/32/19816_2.png) [@zslane](https://forums.yoyoexpert.com/u/zslane)\ **Post date:** [June 1, 2019, 6:46pm UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/8 "2019-06-01T18:46:14Z")
POM-C vs. POM-H. Both POM. ---
**Author:** ![RyoCanCan](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/ryocancan/32/163437_2.png) [@RyoCanCan](https://forums.yoyoexpert.com/u/RyoCanCan)\ **Post date:** [June 1, 2019, 6:49pm UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/9 "2019-06-01T18:49:26Z")
> [@noodles](#): > > It is very similar except in most cases (but not all) POM yoyos are molded. Tbh I’ve yet to see an injection molded POM yoyo. PC yoyos sure, but no POM afaik. ---
**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:** [June 1, 2019, 7:14pm UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/10 "2019-06-01T19:14:40Z")
YYF Whip and Loop360 and One are all injection molded POM. ---
**Author:** ![RyoCanCan](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/ryocancan/32/163437_2.png) [@RyoCanCan](https://forums.yoyoexpert.com/u/RyoCanCan)\ **Post date:** [June 1, 2019, 7:27pm UTC](https://forums.yoyoexpert.com/t/delrin-and-pom/302994/11 "2019-06-01T19:27:05Z")
Oh they are? Neat. No wonder they’re indestructible.