I haven't had any squarrel cage fans come apart but I did have the condenser fan blade break when the grommets that the motor mounts on failed. Happened to a friend recently too. That was on a 15" model. My new coach has a totally different condenser fan set up and is now called an assembly. Motor, blades and bracket are all one assembly now.
2019 Horizon 42Q Maxum Chassis w/tag
Cummins L-9 450 HP / Allison 3000
2006 Jeep TJ and 2011 Chevy Traverse Tows