Rotary broach

Thanks to give is this video, I have just a question based on my own experimentation with needle bearings which have a tendency under a certain size to make indents when they support an irregular movement as made by the broach, as they support perfectly charge on axis as on two stroke motors for example, with small out of axis charge in rotation it is totally safe in the time ?
The part about precision is very well made for those who can have this problem in fitting bearings.

Rotary broach - video