1. What is Coupling? Couplings have the task of transferring power, torque, and speed from one axis or shaft (drive shaft) to another axis or shaft (driven shaft). In the figure below, you can see a coupling connecting the drive shaft (highlighted in blue) to the driven shaft (highlighted in green), transferring rotational power or torque between the two axes.
  2. Why is there a Wide Variety of Coupling Types? Various problems arise in establishing a connection between two axes, leading to the design and manufacture of different types of couplings to address these issues. The diagram below illustrates these problems:
    • Axial Misalignment (1): Occurs due to longitudinal changes in the axis caused by temperature variations.
    • Radial Misalignment (2): Refers to axes not being in alignment.
    • Angular Misalignment (3): Involves angular displacement between axes.
Types of Couplings:
  1. Types of Couplings: Couplings can be broadly categorized into two main types: Rigid Couplings and Flexible Couplings. a. Rigid Couplings:
    • Flanged Coupling: Common and cost-effective, it uses flanges to create torque transfer.
    • Sleeve Coupling: Utilizes welded sleeves to connect two axes, tolerating some misalignments.
    • Muff Coupling: A clamp-type coupling that can be double or single-jointed.
    • Tapered Coupling: Uses cones to connect axes, capable of tolerating angular misalignments.
These classifications and descriptions aim to empower design engineers to identify coupling types based on various introduced criteria. Feel free to reach out if you have further questions or need additional clarification.
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