How to Install Through Hole Slip Ring

How To Install Through Hole Slip Ring?

Are you looking for information on how to install a slip ring in your device? A through-hole or through-bore slip ring is one of the popular models you will come across in the market and many devices use the model.

Slip rings, which are electromechanical devices, transmit power (electricity), data, or signals from a stationary component to a rotating part. They feature in electric motors, wind turbine control systems, military and mining equipment, smart toys, monitoring equipment, and more.

Technically, any system that requires the transmission of electricity, data, or other signals through parts rotating making infinite 360° rotations, will require slip rings. Each device is application-specific and designed to work in specific equipment and operating environment.

A through-hole slip ring is a model that features a hollow space at the center. The empty area provides room for wires and channels. It also connects the rotating part (rotor) to the fixed part (stator). This guide teaches you to install through-hole slip rings in your device.

Through-hole slip ring features

Before looking at installation steps, it is essential to acknowledge the uniqueness of each slip ring design. Not all through bore slip rings are manufactured the same and their applications vary, so installation procedures may be different depending on the equipment and use. A standard through-hole slip ring will feature carbon graphite brushes, metal housing, and integrated design structures.

They can also support up to 300 circuits with current capacity up to 20A and standard voltage up to 600VAC/VDC. These electromechanical devices are generally designed for applications that involve 360-degree rotations, although some models are not able to achieve this. As such, you must ensure you get the right through hole slip ring for your equipment and application.

Installing a through-hole slip ring

You will get a manufacturer instruction manual to help you with the installation process. Some designs feature dedicated shaft positions, insulation supports and special mounting with dedicated installation spots. However, if your device has no indications, check the manufacturer manual or request installation procedures. Technically, you should ensure the manufacturer offers an installation manual before purchasing the slip ring. Through-hole slip rings can be installed in two main areas, which are the channel (hole) part and the outer flange. Below are the steps used to install standard through-hole slip rings in both parts.

  1. a) Channel installation

To install a through bore slip ring on the channel, you will need to position it in the exact position on the shaft. Start by removing all moisture and dirt from the shaft and adjust the position of the slip rings before attaching and tightening it with the provided screws. Most models use four screws to attach the device to the shaft. Once it is fixed, route the cables and complete slip ring connections, ensuring all wires are in the right position. The shaft should rotate effortlessly without tangling straining the connectors.

  1. b)     Outer flange installation

To install a through-hole slip ring on the outer flange part, align the device with the flange mounting hole and on to the mounting base. Install the flat washers and tighten all screws to attach the slip ring. Route the wires and finish all the required connections. In practice, the unique design and application will determine how you go about installing the slip ring. These slip rings will require fixing the rotary for the inner and outer ring, although you can find models that feature bore rotor flange with a fixed and rotating stator.

Tips for installing through hole slip rings

Although the above steps are standard for typical slip ring motors, the application-specific nature of these devices means you will need to read the specific procedures provided in the manufacturer installation manual. However, there are various basic precautions to observe. Here are some tips for proper through bore slip ring installation:

  1.     Keep it clean

You should keep the slip ring and installation away from dust, dirt and moisture as well as high temperatures. Slip rings work best in low humidity spaces with temperatures below 80° C. If you are installing in extreme weather conditions, make sure you have sufficient insulation.

  1.     Avoid pulling or adding weight

Through-hole slip rings are very sensitive and their lightweight design also leaves them vulnerable to quick wear. There should be enough support for the housing and device and all screws should be tightened to prevent any wobbling or looseness. Avoid adding any extra weight to the slip ring or installation structure.

  1. Keep parts a safe distance apart

The fixed brush should stay away from the axis to prevent contacting the rotary lead, as this will result in friction and rapid wear. To avoid frequent replacement of contact surfaces, make sure there is sufficient space between fixed and rotating parts, so they only slip when the system is operating.


Installing a through-hole slip ring involves considerable technical knowhow, so if you are using big specialty equipment, the procedure is best left to experts. It is also crucial to choose the right slip ring for your application as each device features specifications modeled for unique equipment and conditions. Choosing reputable manufacturers that offer top designs in the market, you can visit to find useful installation guide, and this guide will teach you to install through-hole slip rings