Bearing Brinelling damage can occur during transport and also when the motor is installed.
"MOTOR DESIGN"
Smaller motors are usually fitted with a ball race type bearing at each end. Clearance are small enough to minimize any movement whilst enough to cater for thermal expansion.
Larger...
Hello Bris
Firstly let me say that there is nothing that can ultimately be considered as 100% reliable for ever.
Reliability is a "WISH LIST" item that needs to be addressed properly and in context with reality.
When things go wrong and/or the VSD won't go how this situation is and can be...