Further, stainless steel impellers are widely used where bronze would not satisfy the requirements for corrosion, erosion and/or cavitation resistance. For the pump casing, cast iron is the generally preferred material in most water and wastewater pumping applications...
The ball bearings used in most electric motors are pre-greased, shielded ball bearings. Normal motor bearing operating temperatures range from 140° to 160°F.
https://www.mie-solutions.com/mie-blog/manufacturing-software-systems-reduce-time-material-waste
