# Bearing Specs?

**URL:** <https://forums.yoyoexpert.com/t/bearing-specs/23593>\
**Category:** Yo-Yo Mods and Maintenance\
**Created:** [February 8, 2011, 9:04pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593 "2011-02-08T21:04:23Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![jtman562](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jtman562/32/285_2.png) [@jtman562](https://forums.yoyoexpert.com/u/jtman562)\
**Post date:** [February 8, 2011, 9:04pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/1 "2011-02-08T21:04:23Z")

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Just wondering, what is the ID and OD of a size C bearing?

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**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:** [February 8, 2011, 10:08pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/2 "2011-02-08T22:08:59Z")

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The inner diameter is .250" the outer is .500". In case you are wondering, the standard width is .187".

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**Author:** ![XminusmikeX](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/xminusmikex/32/294_2.png) [@XminusmikeX](https://forums.yoyoexpert.com/u/XminusmikeX)\
**Post date:** [February 8, 2011, 10:13pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/3 "2011-02-08T22:13:36Z")

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…Or if you want it in metric: 6.350mm x 12.70mm x 4.7625mm ;D

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**Author:** ![anonyo](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@anonyo](https://forums.yoyoexpert.com/u/anonyo)\
**Post date:** [February 8, 2011, 10:24pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/4 "2011-02-08T22:24:39Z")

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But the metric and standard C bearings don’t interchange.

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**Author:** ![XminusmikeX](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/xminusmikex/32/294_2.png) [@XminusmikeX](https://forums.yoyoexpert.com/u/XminusmikeX)\
**Post date:** [February 8, 2011, 10:30pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/5 "2011-02-08T22:30:16Z")

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In most cases you are correct, but that’s the Metric equivalent to the C specs if I’m correct. I maybe wrong ;D

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**Author:** ![anonyo](https://avatars.discourse-cdn.com/v4/letter/a/8baadc/32.png) [@anonyo](https://forums.yoyoexpert.com/u/anonyo)\
**Post date:** [February 8, 2011, 10:34pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/6 "2011-02-08T22:34:28Z")

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I just said that so they wouldn’t get confused. Your numbers are correct.

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**Author:** ![jtman562](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jtman562/32/285_2.png) [@jtman562](https://forums.yoyoexpert.com/u/jtman562)\
**Post date:** [February 8, 2011, 10:37pm UTC](https://forums.yoyoexpert.com/t/bearing-specs/23593/7 "2011-02-08T22:37:53Z")

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Thanks Guys.