Originally Posted by
n305fa
The only way the rollers can get out of an installed planet gear is if the outer race either brakes, deforms or is pulled off the inner race. Getting them out of the loading slot in the inner race can only be done with the inner race, rollers and cages rotated 90 degrees to the outer race.
The outer race is part of a sphere and the rollers are barrel shaped which allows the gear to "self align"
I think during this incident a considerable amount of miss alignment took place.