What are Splines?

Internal and external splines are key components used in mechanical engineering and various industries. Splines are mechanical teeth or ridges that enable the transfer of torque and rotational motion between shafts, gears, and other mating parts. Internal splines are machined or formed inside a hollow component, such as a gear hub or a coupling, while external splines are located on the outside surface of a shaft or a cylinder.

Internal Splines
The use of internal splines allows for the efficient transmission of power and rotational forces within a component. They provide a secure and accurate connection between components, enabling torque to be transmitted without slippage or misalignment. Internal splines are commonly found in applications such as gearboxes, transmissions, and hydraulic systems.

External Splines
External splines, on the other hand, are used for connecting shafts or coupling devices. They provide a means of transferring torque from one component to another while ensuring proper alignment and engagement. External splines are often utilized in automotive transmissions, power transmission systems, and various industrial machinery.
In summary, both internal and external splines play crucial roles in mechanical systems by facilitating the transmission of torque and rotational motion. Their precise design and implementation contribute to the efficient operation and reliability of a wide range of mechanical assemblies.

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