Flexible Shaft Couplings
Available from Servometer
Precision motion control applications require mechanically tight systems, especially between motors, driven loads, and feedback devices, to ensure accurate positioning. Such systems often require shaft couplings that are both torsionally rigid to accurately transmit rotational position, and laterally flexible to accommodate shaft misalignment.
Servometer® -PMG, LLC precision electrodeposited nickel alloy bellows-type flexible shaft couplings provide torque capabilities from 2 oz-in. to 20 lb-ft., 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.
Visit www.servometer.com for additional information.