# Duncan Pro Z Bearing

**URL:** <https://forums.yoyoexpert.com/t/duncan-pro-z-bearing/298084>\
**Category:** General Yo-Yo\
**Created:** [January 26, 2019, 10:32pm UTC](https://forums.yoyoexpert.com/t/duncan-pro-z-bearing/298084 "2019-01-26T22:32:53Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![eternalmetal](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/eternalmetal/32/44877_2.png) [@eternalmetal](https://forums.yoyoexpert.com/u/eternalmetal)\
**Post date:** [January 26, 2019, 10:32pm UTC](https://forums.yoyoexpert.com/t/duncan-pro-z-bearing/298084/1 "2019-01-26T22:32:53Z")

</div>

Just picked up another Pro Z when I was out and about, and it says on the back “concave bearing patented by Dif-e-Yo is used under license by Duncan Toys Co.” I havent opened the box yet, but to me it looks like a regular C size bearing. Does anyone know if this bearing is an actual Dif-e-Yo Konkave bearing, or is just a knockoff that Duncan has made? It comes unshielded and has 10 ball bearings inside.

---

<div class="post-metadata">

**Author:** ![Smurf88](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/smurf88/32/299375_2.png) [@Smurf88](https://forums.yoyoexpert.com/u/Smurf88)\
**Post date:** [January 26, 2019, 11:34pm UTC](https://forums.yoyoexpert.com/t/duncan-pro-z-bearing/298084/2 "2019-01-26T23:34:51Z")

</div>

It’s the same one that came with my echo 2. Honestly I think it’s the same bearing. They play the same and look the exact same. I also picked up the pro z and wondered the same thing. Compared them and they seem to be.

---

<div class="post-metadata">

**Author:** ![eternalmetal](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/eternalmetal/32/44877_2.png) [@eternalmetal](https://forums.yoyoexpert.com/u/eternalmetal)\
**Post date:** [January 26, 2019, 11:51pm UTC](https://forums.yoyoexpert.com/t/duncan-pro-z-bearing/298084/3 "2019-01-26T23:51:15Z")

</div>

Interesting, since the Echo 2 is advertised to have the KonKave, but they are much more subtle about it with the Pro Z. Considering that the bearing normally costs $15, it is quite a bargain to spend $5 less and have it bundled with a yoyo. I have some stuff to do in the meantime, but ill play around with it later. So far the bearing spins nice and smooth on top of a pen, but I might clean it before I throw it. Thanks for the insight!

---

<div class="post-metadata">

**Author:** ![eternalmetal](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/eternalmetal/32/44877_2.png) [@eternalmetal](https://forums.yoyoexpert.com/u/eternalmetal)\
**Post date:** [January 27, 2019, 2:00am UTC](https://forums.yoyoexpert.com/t/duncan-pro-z-bearing/298084/4 "2019-01-27T02:00:20Z")

</div>

Well, after further examination, the bearing isnt up to snuff. It is visibly scratched and the bearing seat doesn’t line up as well as other bearings. When thrown, the yoyo has a significant amount of vibe. Im guessing they ship this yoyo with Dif-e-Yo rejects or something, which would explain why a.) they dont advertise it, and b.) why someone else could have a positive result.