Flexible Shaft Bellows Couplings
Precision motion control applications require mechanically tight systems, especially between motors, driven loads, and feedback devices, to ensure accurate positioning. Such systems often require flexible shaft couplings that are both torsionally rigid, to accurately transmit rotational position...
Precision motion control applications require mechanically tight systems, especially between motors, driven loads, and feedback devices, to ensure accurate positioning. Such systems often require flexible shaft couplings that are both torsionally rigid, to accurately transmit rotational position and laterally flexible, to accommodate shaft misalignment.Electrodeposited bellows technology has proven to offer the best combination of flexibility and strength among coupling technologies. Servometer bellows couplings exhibit both low windup due to the bellows radial rigidity, and low side thrust due to the its lateral flexibility. Other coupling types have either low windup or low side thrust, but not both. Since the flexible element is a metal bellows, the coupling can absorb parallel shaft misalignment of 0.068 in., angular misalignment as large as 31°, or axial movements of 0.230 in. while transmitting torque.
The electrodeposition process to create the bellows offers high strength, seamless construction with maximum flexibility.Servometers stock lines of flexible shaft couplings are available with stainless steel hub bore diameters ranging from 0.079 in. (2 mm) to 1.0 in. (25.4 mm), and with torque capabilities ranging from 2.0 in-oz (1.4 N-cm) to 4000 in-oz (2825 N-cm).Outside diameters range from 0.250 in. (6.35 mm) to 2.40 in. (61 mm) and overall lengths from 0.480 in. (12.19 mm) to 2.16 in. (54.9 mm). Specialized dynamic requirements can be custom designed to fit customer specifications.
Designing with Metal Bellows Couplings
DESIGN ENGINEERS with precision rotary motion requirements such as instrumentation and fractional horsepower applications often choose electrodeposited nickel bellows because of their high performance characteristics like positive displacement , zero windup and low or minimal backlash. Servometer’s compact bellows couplings accommodate more than 30 times the angular misalignment and 15 times the compression or extension tolerated by other types of couplings.
Electroforming is the process of depositing thin layers of metal onto a mandrel through electroplating, dissolving the mandrel chemically, and leaving the plating as the final electroformed product. This white paper illustrates how electroformed components are manufactured and how they can be applied to a variety of applications.
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