Slip rings are available in a wide range of form factors, but two of the most commonly used configurations are through-bore slip rings and capsule slip rings. Each design offers distinct advantages depending on the mechanical layout, electrical requirements, and operating environment of the application. Selecting the correct architecture early in the design process can simplify integration and improve long-term system reliability.

Through-bore slip rings feature a hollow center that allows shafts, pneumatic lines, hydraulic tubing, or fiber optic cables to pass through the assembly. These designs are widely used in industrial automation, robotics, cable reels, packaging equipment, and rotary indexing systems where additional routing space is required. Their larger size also allows them to support higher current capacities and more complex mixed-signal configurations.

Capsule slip rings are designed for compact systems where space is limited and routing through the center bore is not necessary. Their lightweight construction makes them ideal for cameras, gimbals, medical devices, small robotics platforms, and compact rotating assemblies. While smaller in size, capsule slip rings can still support reliable transmission of power, control signals, Ethernet communication, and other low-current applications. Understanding the tradeoffs between these two architectures helps ensure the rotary interface is properly matched to the system’s operational requirements.