Servometer® / PMG, LLC, precision electrodeposited, nickel alloy bellows-type flexible shaft couplings provide torque capabilities from 2 oz-in (1.4 Ncm) to 20 lb-ft (27 Nm), for shaft sizes ranging from .090 to 1 inch. Because of their flexibility, the low torque couplings can handle angular misalignment up to 31°, or parallel misalignments (shafts parallel but offset) up to .076 inch. In general, as flexibility increases, torque capacity decreases. For attachment to shafts, standard set screw hub, split hub with clamping collar or integral clamp hub styles are available. Unique characteristics of Servometer bellows couplings are zero backlash, vibration damping capability, zero cyclic speed variation during 360° rotation, very low elastic windup, due to torsional rigidity, and low side thrust on bearings because of lateral flexibility. Other couplings types have either low windup or low side thrust; but not both. Bellows couplings are indispensable for use in critical applications such as resolvers, encoders, servos, motion control devices, and computers. For cost information on our stock line of flexible shaft couplings, contact us at info@servometer.com.

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