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

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Multiple Choice

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

When aligning a motor to its driven load, temperature matters because parts expand as they heat up. The motor, driven shaft, coupling, and even the base all change size with temperature, and they don’t all expand at the same rate. That means the perfect alignment you set in one condition won’t be the same once the system heats to running temperature. Aligning at room temperature establishes a good clean setup during installation, but once the machine reaches operating temperature, thermal growth can alter the alignment enough to cause vibration and wear if you only checked it cold. Verifying alignment at operating temperature ensures the setup is correct under real working conditions, accounting for how each component expands. By checking at both temperatures, you address both scenarios: the initial installation fit and the actual running fit. If you only do one, you risk under- or over-aligning under heat, leading to premature belt/coupling wear or bearing stress. Other options fall short because they ignore either the cold condition or the hot condition, leaving potential misalignment unaccounted for.

When aligning a motor to its driven load, temperature matters because parts expand as they heat up. The motor, driven shaft, coupling, and even the base all change size with temperature, and they don’t all expand at the same rate. That means the perfect alignment you set in one condition won’t be the same once the system heats to running temperature.

Aligning at room temperature establishes a good clean setup during installation, but once the machine reaches operating temperature, thermal growth can alter the alignment enough to cause vibration and wear if you only checked it cold. Verifying alignment at operating temperature ensures the setup is correct under real working conditions, accounting for how each component expands.

By checking at both temperatures, you address both scenarios: the initial installation fit and the actual running fit. If you only do one, you risk under- or over-aligning under heat, leading to premature belt/coupling wear or bearing stress.

Other options fall short because they ignore either the cold condition or the hot condition, leaving potential misalignment unaccounted for.

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