Ok I am trying to figure out if I can use two bearings in place of one bearing.

the two bearings are half the load rating of the original. Will using two at half the load rating equal the one? or be close?

This is for the X2 mini mill head r8 spindle. I am probably making a new head. I plan to use the spindle and I want to go from a 62mm O.D. to around 47 to 50mm. To do this I will have to go to a bearing that has half the load and static specs.
The reason for going smaller is so that I can fit the spindle and bearings into a quill housing

So anyone who can chip in, I would appreciate it.