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  • Sensor Film Shows Assembly Clamp Needs a Redesign
    Load cell and torque/pressure-sensor maker recently had problems assembling load cells to spec. The load cells employ a metal foil strain gauge that 's adhesively bonded to the sensor. The spec calls for 50 to 75 psi of clamping pressure during assembly. Technicians ran nondestructive tests (NDT
  • How tight is right?
    . Bolted assemblies act as two springs -- the fastener in tension and the bolted components in compression. An elastic joint results when a fastener flexes more than the clamped parts and overcomes resistance to joint compression. Fastener tension is measurable with various devices including strain

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