The alignment of the motor and the driven mechanism must be performed at which temperatures?

Prepare for the essential 636 Period 3 Motor Final Test with comprehensive flashcards and detailed questions. Access explanations and hints for each question to ace your exam!

Temperature changes cause components to expand or contract, so the alignment you set isn’t the same at different temperatures. When the motor and driven equipment heat up during operation, their shafts, couplings, bases, and mounting surfaces grow by amounts that depend on their materials. If you align only at room temperature, that alignment can drift once the system reaches operating temperature, risking misalignment, vibration, and wear. By checking and adjusting alignment at operating temperature, you see how the parts actually sit in service. Many technicians also verify at room temperature to catch any preloads or stresses present when cool. Taking both temperatures into account ensures the alignment stays within tolerance across the temperature range, which is why the best approach is to consider both room and operating temperatures.