I the first set of "green" bearings I bought from Summers Bros. back in the mid 1970s failed and allowed the axle to slide out of the rear end housing on street car due to the inner retainer sliding out of place The customer was on his way to northern CA from So Ca and had to have it fixed on the road, NOT GOOD Same thing on a drag car at the races, retainer didn't hold the bearing in place and the axle slid out making the tires rub on the rear 1/4 panels
Maybe Murphy loved messing with me back then,
No other failures since then
The tapered Timken Roller bearings are a lot sronger for road use as well as being a lot more money when replacing them
I use to work in service stations as a kid and I have replaced a lot more ball bearings and races on the front hubs of the older GM cars than on either Ford or Mopars with tapered ball bearings back then
The ball bearings will not take any side preload at all, if you run them to loose or to tight on the preload they will fail
Not so on the Timken tapered roller bearings