# Yoyo Axle thread sizes

**URL:** <https://forums.yoyoexpert.com/t/yoyo-axle-thread-sizes/55810>\
**Category:** Yo-Yo Mods and Maintenance\
**Created:** [June 30, 2013, 4:44am UTC](https://forums.yoyoexpert.com/t/yoyo-axle-thread-sizes/55810 "2013-06-30T04:44:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jupdyke](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jupdyke/32/1416_2.png) [@jupdyke](https://forums.yoyoexpert.com/u/jupdyke)\
**Post date:** [June 30, 2013, 4:44am UTC](https://forums.yoyoexpert.com/t/yoyo-axle-thread-sizes/55810/1 "2013-06-30T04:44:32Z")

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Does anyone know anything about the threads on the axle. I am looking to machine some yoyos and will be drilling and tapping the axle hole. I have not picked which axle will be used, but I am curious if anyone knows what some of the common ones are.

Maybe they are 4-40 threads, or 2-56. If you know that would be helpful so I can make sure I have the correct tap sizes.

Thanks,  
Josh

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**Author:** ![jhb8426](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jhb8426/32/631_2.png) [@jhb8426](https://forums.yoyoexpert.com/u/jhb8426)\
**Post date:** [June 30, 2013, 5:00am UTC](https://forums.yoyoexpert.com/t/yoyo-axle-thread-sizes/55810/2 "2013-06-30T05:00:15Z")

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I believe there’s a list of common sizes here…  
[List of useful modification and maintenance guides](http://yoyoexpert.com/forums/index.php/topic,17792.0.html)

The minimum useful size is generally a #6. Currently #8 & #10 are used some. 1/4-20 used to be popular. On the metric side 4mm x 7 pitch is common.