Originally Posted by Frankly
As to why Bruntons used ball bearings, those blades have to all assume the same precise angle of attack. Get a little weed in one of the bearing races (probably not likely on the sealed unit) and you will be off to the dentist to get your fillings replaced.
Agreed, but -
Brinelling (or false-) must be capable of introducing resistance to rotation when present mustn't it?
Given that roughness can be felt on inspection
Once it starts the increased "hammering" in a ball or roller bearing can rapidly lead to failure.