Electrical slip rings are useful in many industries. With much automation that needs electricity, manufacturers have to look for ways to transmit current, especially in 360° rotating machines.

Manufacturers create these slip rings for the purpose. As a customer looking for a slip ring, do you know what they are? Here, you will read what they are, how manufacturers make them, and what to look for when buying one.

What Is an Electrical Slip Ring?

The term “electrical” gives you a hint, right? Well, an electrical slip ring is an electro-mechanical device that manufacturers install in rotating plants and machines to send currents from moving parts to stationary ones.

These slip rings are gaining popularity due to the impact they have on rotating equipment. They bring reliability, operation speed, and performance to machinery when customers install them. Just like bearing that turn at the inner circle without rotating in the outer circle, these slip rings transfer electricity and keep the cable separate from the rotating part.

Any slip ring can pass currents. Also, with modern technology, companies specializing in making slip rings have seen the need for making specialized slip rings for carrying current to the motors and sensors to start the action. So, what makes the slip rings unique from others? Read to know.

Components of an Electric Slip Ring

To know an electric slip ring better, you must understand how manufacturers make it. They make the slip ring according to your demand. Customers want this slip ring depending on the size, the voltage to carry, rotating speed environment to use and many other factors. So, what makes an electric slip ring?

An electric slip ring has two main parts. It has the electrical component, which is the intricate part of the slip ring. That is because it carries the power, parameters, sensor signals, and current. It is the one responsible for bringing the flows to and from the stationary part.

Another part is the mechanical piece. It is the outer part of the slip ring and is responsible for housing the electrical part. It has the protection, grade, weight, and dimensions of the slip ring. What makes this slip ring stand out is the brushes it has. Before you buy any electrical slip ring, you must learn about the brushes.

Electrical Slip Ring Brushes

The brushes in a slip ring are very important because they are the ones responsible for transferring the current from the rotating part to the conductive device. In this slip ring, manufacturers use three different technologies in making them. The technologies are:

  • Composite: It is where manufacturers use carbon graphite and sometimes metal to increase the current-carrying capacity. The brushes that resemble brushed electric motors are suitable in places where a customer wants to transmit high current and RMP.
  • Monofilament: The brushes are partially wrapped around the slip ring at the channel point. What makes them different from composite is that they are of precious metals like silver, gold, or palladium and are prevalent in low current that needs clear transmission and minimal contact friction.
  • Polyfillament: They, too are of precious metals. Also, they wrap partially around the slip ring, but what makes them different is that they include multiple contacts per channel. They provide minimal contact, friction, and noise. Besides, they are suitable for carrying sensitive analog signals and data at higher rates for cost-effectiveness.

Every customer should have specific details of what they want before buying a slip ring. That is to make sure they get the best slip ring for their machine. How many types of electric slip rings are there in the market? Continue reading and know.

Examples of Electrical Slip Rings

Yes, there are many types of slip rings in the market. It may surprise a customer who does not know much about slip rings. Manufacturers make different slip rings depending on properties, outlines, and industrial applications. The following are different types of these slip rings:

  • Temperature conductive slip rings
  • High-speed slip rings
  • Strain gauge slip rings
  • Big OD
  • Military slip rings
  • Reel slip rings
  • Revolutionary slip rings

When you are planning to buy one, working with a reliable manufacturer is advisable because they guide you into getting the right slip ring that will suit your purpose. What are the factors that you should consider when buying these slip rings?

Factors to Consider When Buying an Electrical Slip Ring

Manufacturers give customers a choice of customizing an electrical slip ring. What should you have in mind? The following are the factors to consider when looking for an electrical slip ring.

  • Voltage to carry: The slip ring is useful for transmitting current. The amount of current the slip ring takes should be the number one focus. For example, a slip ring made to transfer low voltage dismantles when a high current passes through it.
  • The outer diameter and rotating speed: That happens especially in slip rings with a hole in the center. The width and rotating speed come in handy when installing the slip ring to make sure it is compatible with the machine to work in.
  • Size and the environment to use in: Slip rings are convenient to use in different situations. Choose one depending on the climate state of the work area to reduce maintenance fees and wearing out.
  • The brush in use: As you have read above, brushes in a slip ring play a significant role in what amount of voltage to transmit. For that reason, ask questions about the type brush in the electrical ring you want to buy before you select the type.


Electrical slip rings are suitable for transmitting currents. They have been in use in many rotating industrial plants and machines that need electricity to work. For a customer looking for these slip rings, the above information about the slip rings is crucial. It guides you into buying the best electrical slip ring for your plant.



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