Bearings with 6mm BBbullets（6mm的BB弹轴承）

The bearings are made from 6mm BB bullets.
I measured the diameter of the BB bullet with a caliper and it was about 5.9mm.

I set the size of each part with this generator and generated it with Fusion360.
dbb=6.0 is too tight.
dbb=6.5 is too loose,
When dbb=6.2, it's a little bumpy, but it goes around and around
When dbb=6.1, there's no clatter, but it's a little hard to turn
DBB=6.1 or 6.2 seems to be just fine.
Tralated with (free veion)
用6mm的BB弹制作轴承。
用卡尺测量BB弹的直径大约5.9mm。

使用此生成器设置各部分的大小，并在Fusion 360中生成。
dbb=6.0太厉害了，
dbb=6.5太松，
如果是dbb=6.2的话，会有点僵硬，但会转来转去，
dbbb=6.1的话没有蜗牛，但是有点难旋转，
dbb=6.1或6.2好像正好。