# Moding an A bearing seat into D

**URL:** https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702
**Category:** Yo-Yo Mods and Maintenance
**Created:** [May 1, 2022, 12:36pm UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702 "2022-05-01T12:36:43Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![hobby\_master](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobby_master/32/145533_2.png) [@hobby\_master](https://forums.yoyoexpert.com/u/hobby_master)
#### Post date: [May 1, 2022, 12:36pm UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702/1 "2022-05-01T12:36:44Z")

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Ive decided i want to make my new freehand into a D bearing. Does anyone have info on how i can do this?

The D bearing seems to fit in nicely but needs a little adjusting to allow a free flowing bearing

 ![20220501_213547](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/f/6/3/f6382eadde776c25e2ead3ebc0f0485cc7ad993e.jpeg)

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### Author: ![yoyospirit](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yoyospirit/32/219875_2.png) [@yoyospirit](https://forums.yoyoexpert.com/u/yoyospirit)
#### Post date: [May 2, 2022, 9:54pm UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702/2 "2022-05-02T21:54:54Z")

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Is this for the Duncan Freehand One? The wall between the bearing seat and pad may be too thin for this mod. Basically you’d have to widen a portion of the wall so the larger bearing doesn’t rub on it.

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### Author: ![bheinz63](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/bheinz63/32/137310_2.png) [@bheinz63](https://forums.yoyoexpert.com/u/bheinz63)
#### Post date: [May 2, 2022, 10:08pm UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702/3 "2022-05-02T22:08:42Z")

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A bearings are 5mm ID x 10mm OD, D bearings are 5mm ID x 11mm OD.

You just need to make the outer diameter larger to accommodate the 11 mm diam D bearing

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### Author: ![hobby\_master](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/hobby_master/32/145533_2.png) [@hobby\_master](https://forums.yoyoexpert.com/u/hobby_master)
#### Post date: [May 2, 2022, 10:53pm UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702/4 "2022-05-02T22:53:41Z")

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Ok yea i wasnt sure if i had to do it that way or i could use some kind of spacer under the seat to raise it away from the wall. Thank i will open the wall up a bit

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### Author: ![sergchz](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/sergchz/32/159425_2.png) [@sergchz](https://forums.yoyoexpert.com/u/sergchz)
#### Post date: [May 2, 2022, 10:55pm UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702/5 "2022-05-02T22:55:12Z")

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Good luck and let us know how it goes! I’d love to try a D bearing FH if it’s easy enough to replicate

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### Author: ![yoyodoc](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/yoyodoc/32/48820_2.png) [@yoyodoc](https://forums.yoyoexpert.com/u/yoyodoc)
#### Post date: [May 4, 2022, 6:49am UTC](https://forums.yoyoexpert.com/t/moding-an-a-bearing-seat-into-d/356702/6 "2022-05-04T06:49:11Z")

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