# What does ABEC mean? also what's the difference between YYJ speed and spec? **URL:** \ **Category:** General Yo-Yo\ **Created:** [May 16, 2010, 10:15pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485 "2010-05-16T22:15:19Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Johnny\_rocks](https://avatars.discourse-cdn.com/v4/letter/j/49beb7/32.png) [@Johnny\_rocks](https://forums.yoyoexpert.com/u/Johnny_rocks)\ **Post date:** [May 16, 2010, 10:15pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/1 "2010-05-16T22:15:19Z")
I was looking at bearings and was saying something about ABEC, what does that mean? and what’s the difference between YYF speed and spec bearings? ---
**Author:** ![hubstack](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hubstack/32/7912_2.png) [@hubstack](https://forums.yoyoexpert.com/u/hubstack)\ **Post date:** [May 16, 2010, 10:26pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/2 "2010-05-16T22:26:05Z")
i think abec is the grade i think like abec 7 is good and abec 1 is bad yyj makes the speed bearing and yyf makes the spec imo i like the speed bearing between the two but overall i like 10 balls or ckks the best( i despise ct bearings) ---
**Author:** ![anonyo](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@anonyo](https://forums.yoyoexpert.com/u/anonyo)\ **Post date:** [May 16, 2010, 11:51pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/3 "2010-05-16T23:51:31Z")
Abec is a rating that has absolutely nothing to do with yoyo’s. I don’t want to type it so just read here. [http://www.seskate.com/technical/ABEC.html](http://www.seskate.com/technical/ABEC.html) ---
**Author:** ![yoyojamben](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yoyojamben/32/289780_2.png) [@yoyojamben](https://forums.yoyoexpert.com/u/yoyojamben)\ **Post date:** [May 16, 2010, 11:58pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/4 "2010-05-16T23:58:43Z")
Isn’t it just a rating of how smooth and long spinning a bearing is? Abec7’s are nice, smooth, and long spinning, as Abec 1’s arent? ---
**Author:** ![UnstoppableWalnut](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/unstoppablewalnut/32/512_2.png) [@UnstoppableWalnut](https://forums.yoyoexpert.com/u/UnstoppableWalnut)\ **Post date:** [May 17, 2010, 12:14am UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/5 "2010-05-17T00:14:06Z")
[http://www.skatelog.com/bearings/abec.htm](http://www.skatelog.com/bearings/abec.htm) > **[What does ABEC rating mean for skateboard bearings?](https://vandemlongboardshop.co.uk/pages/abec-ratings-explained)** > > Everything you need to know regarding ABEC ratings as they relate to standard 608 skateboard and longboard bearings. Way more info than you probably need, but worth a read!! > **[What ABEC Tells You About Skateboard Bearings](https://www.liveabout.com/abec-bearings-ratings-3002421)** > > The ABEC rating system is the American method for rating the accuracy and tolerance of skateboard bearings. [http://skateboard.about.com/od/gear/f/ABEC\_Bearings.htm](http://skateboard.about.com/od/gear/f/ABEC_Bearings.htm) Read those links (and link from those links). ABEC 1 can handle 38,000 RPMs. Which you won’t get anywhere near with a yoyo. ---
**Author:** ![Yummy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yummy/32/14065_2.png) [@Yummy](https://forums.yoyoexpert.com/u/Yummy)\ **Post date:** [May 17, 2010, 12:22am UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/6 "2010-05-17T00:22:45Z")
To paraphrase the link icthus gave, the ABEC rating has to do with tolerances. How close to spec the inside and outside diameter are. That really isn’t important with yo-yos. The rotating accuracy of bearings is extremely important in a precision tool such as a lathe but doesn’t matter on a yo-yo. ---
**Author:** ![newbee](https://avatars.discourse-cdn.com/v4/letter/n/5f8ce5/32.png) [@newbee](https://forums.yoyoexpert.com/u/newbee)\ **Post date:** [May 17, 2010, 11:41am UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/7 "2010-05-17T11:41:11Z")
That ABEC rating makes me feel dizzy. ---
**Author:** ![Big\_Andrew](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/big_andrew/32/384_2.png) [@Big\_Andrew](https://forums.yoyoexpert.com/u/Big_Andrew)\ **Post date:** [May 17, 2010, 11:57am UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/8 "2010-05-17T11:57:02Z")
you forgot to say that YYJ speed bearing is stainless steel…it is a good thing:P ---
**Author:** ![CaliBuddha](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/calibuddha/32/156_2.png) [@CaliBuddha](https://forums.yoyoexpert.com/u/CaliBuddha)\ **Post date:** [May 17, 2010, 12:08pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/9 "2010-05-17T12:08:20Z")
ABEC= Annular Bearing Engineering Corporation or something similar. ---
**Author:** ![anonyo](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@anonyo](https://forums.yoyoexpert.com/u/anonyo)\ **Post date:** [May 17, 2010, 12:17pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/10 "2010-05-17T12:17:01Z")
committee ---
**Author:** ![x52](https://avatars.discourse-cdn.com/v4/letter/x/3bc359/32.png) [@x52](https://forums.yoyoexpert.com/u/x52)\ **Post date:** [May 17, 2010, 6:40pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/11 "2010-05-17T18:40:28Z")
> [@Big\_Andrew](#): > > you forgot to say that YYJ speed bearing is stainless steel…it is a good thing:P So is the Yoyofactory SPEC bearing. 🙂 ---
**Author:** ![Big\_Andrew](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/big_andrew/32/384_2.png) [@Big\_Andrew](https://forums.yoyoexpert.com/u/Big_Andrew)\ **Post date:** [May 17, 2010, 6:46pm UTC](https://forums.yoyoexpert.com/t/what-does-abec-mean-also-whats-the-difference-between-yyj-speed-and-spec/14485/12 "2010-05-17T18:46:57Z")
> [@x52](#): > > > [@Big\_Andrew](#): > > > > you forgot to say that YYJ speed bearing is stainless steel…it is a good thing:P > > So is the Yoyofactory SPEC bearing. 🙂 i didn’t know that…thanks for information :wink: