A pressed on collar keeps the bearing in place on the axle, the axle retainer between the backing plate and housing is what keeps the axle in place. held on by 5 studs with nuts. the snap does not hold axle in place.
All agreed, but what keeps the axle bearing and entire assembly from sliding through the axle retainer flange? See that snap ring? The only other way would be if the hole in the axle retainer flange was smaller than the axle bearing O.D. Then, it would not need a snap ring.
