There is no independent AMP-33. This is a search term mutation. The correct reference is NEMA MG1-33 , which covers thermal application and duty cycles.
Three days later, the rotor was repaired. No new bearings—the old ones were cleaned and re-shimmed. Because as Harout noted, citing MG1-33's footnote: New bearings on a damaged shaft do not solve the problem; they inherit it. nema mg1-32 amp- 33
The subject refers to the NEMA MG 1-2021 standard, specifically Section IV, Parts 32 and 33 There is no independent AMP-33