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COLD ALIGNMENT - Intentional and calculated misalignment of the shafts of two machines to compensate for the anticipated thermal growth.
DAMPING - The ability of a material to absorb vibrational energy.
ENDURANCE LIMIT - The maximum level of stress at which failure due to fatigue will not occur.
FATIGUE - Failure of metal parts by progressive cracking caused by cyclic application of stress.
FRETTING - A process by which small amounts of surface particles are removed by an opposing rubbing component thru fatigue.
PEAK TORQUE - The greatest occasional torque that a coupling can withstand.
POTENTIAL UNBALANCE - The variation of unbalance measured after every disassembly and reassembly of a coupling.
POWER DENSITY - The ratio between the rated torque of a coupling and its size or weight.
SAFETY FACTOR -The ratio between the rated torque of a coupling and the value at which failure would occur.
SERVICE FACTOR - The ratio between the design torque and the nominal torque.
TORQUE - The effectiveness of a force in setting a body into rotation.
TORSIONAL STIFFNESS - The torque required to produce angular displacement of the coupling hubs with respect to each other.
UNBALANCE - The net unbalance of a coupling after installation.
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