API 541 5th Edition Understanding the Changes and ...
Sauer May 2017 Page 10 API 541 4th Edition –Standard Motor Features Copper rotors (Aluminum allowable if approved by purchaser) with Phosphorous-free braze material (Cu bar rotors) Special rotor balance procedures (Step Balance 2 & 4-poles) 1.5 mils (0.0015”) p-p shaft displacement vibration limit (unfiltered)
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