Compact Rotary Electrical Joint Capsules

Miniature Slip Rings

  • up to 56 circuits
  • Size 6, 12, 22 and 25mm
  • Lightweight and compact
  • Analog and Digital Signals
  • Description
  • Good to know

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Miniature slip rings for every application

The miniature slip ring capsules have a very compact design and are very lightweight. They have integrated bearings and a robust housing made of plastic or aluminum. Waterproof versions with IP67 protection are also available. The gold-gold technology used for both the rings and the brushes enables interference-free transmission of signals with high data rates and high frequencies. In addition, a long service life can be guaranteed. These electrical rotary joints have been designed with the optimization of signal transmission, compactness and reliability in mind. Nevertheless, they are very cost-effective. Moreover, these miniature slip rings are available in a wide range of configurations from 3 to 56 circuits. Custom and tailor-made solutions with different cable lengths and assembled connectors are also feasible.

The miniature slip rings prove themselves every day in countless applications such as, webcams, surveillance cameras, examination lights, revolving doors, rotary indexing tables, packaging machines, test equipment, cable reels, medical and pharmaceutical equipment.


Slip rings from TDS Precision Products GmbH: Highest quality for highest requirements

General description of slip rings

Slip rings transmit signals or electrical power from a fixed structure to a movable one, ensuring continuous rotation and preventing that the electrical conductors are stressed by mechanical torsion. The slip rings are also known as: electric rotary joint, electric collector, electric joint or electric coupling

What are slip rings made of?

Slip rings consist of two parts: an outer one called STATOR (because it is normally stationary) consisting of brushes made of precious material (gilded or silver plated copper) and an internal part called ROTOR (because it normally rotates) also consisting of rings made with precious materials. Operation is reversible, i.e. the external part, which is normally fixed, can be made to rotate and, as a result, the internal part (which normally rotates) can be kept fixed.

What is special about slip rings from TDS Precision Products GmbH?

Our electrical slip rings are characterized by particularly high-quality brushes and rings: We use special precious metals and bearings to manufacture these components. The high quality of the materials and the special geometry of the components make them very robust. As a customer, you benefit from these ideal properties thanks to a product service life of up to 50 million revolutions.

Slip rings for numerous applications

We offer slip rings for transmitting power and signals in various designs, each optimized for specific applications. These include electrical slip rings with hollow shafts as well as slip ring bodies with Ethernet cables or open, encapsulated and protected models. Our supplier factories manufacture these products under strict quality criteria and subject them to regular testing.

How do I install/mount my slip ring in my system?

CAUTION: Because of possible geometric mismatching between the customer’s application and the slip ring, “hard mounting” of both ends of the slip ring (i.e., securing the rotor and stator such that there is NO floating during operation) is not recommended and may cause premature failure..

Capsule slip rings, flange mount:

1) The slip ring enclosure is designed to be flange mounted with a cantilevered housing.
2) The rotor must be driven with a flexible coupling (e.g., rubber hose, spiral, or bellows) to compensate for any eccentricities during assembly. The rotor strands can be used as a flexible coupling for operation at speeds up to 5 rpm.
3) Use 3 bolts with washers to secure the slip ring. If lock washers are also used, flat washers should be installed between the lock washers and the flange. (Screws and washers are not included in the delivery)
4) The slip ring is not designed to support the weight of the unit to which it is connected. Rotating units should be secured so that no axial or radial load is applied to the rotary electrical rotary joint.
5) The slip ring should be protected from dust and moisture. For outdoor installations, the slip ring should be installed in a weatherproof enclosure.
6) Secure all wiring so that it does not rub against any surface when the unit is rotating. When routing and securing the cables, ensure that there is no side loading of the slip ring.

Mounting hollow shaft slip rings (rotary unions with through hole):

1) Position the slip ring at the desired location and tighten the two set screws on the shaft equally at both ends of the joint. 
2) Route the wiring and make the necessary connections. Make sure that the wiring does not restrict the free rotation of the slip ring.
3) Insert a screw or dowel (not supplied) into the anti-rotation device.


1) Align the mounting holes in the flange with the mounting base and install washers and thread forming screws (NOT IN SUPPLY) for plastic. Tighten the screws securely.
2) Route the wiring and make the necessary connections. The wiring must not restrict the free rotation of the slip ring.
3) Insert a screw or dowel (not supplied) into the anti-rotation device.


Article No. Size No. of circuits Current Voltage Speed Feature/Option Images 3D Data sheet Order Wishlist
HM006 6.5mm up to 12 1A up to 240V 250rpm Compact Order
SVTS A 01 12mm up to 18 2A up to 240V 250rpm IP65 Order
ESA 12mm up to 12 2A up to 120V 100rpm High Quality Order
SVTS A 02 15mm up to 24 2A up to 240V 250rpm Flange selectable Order
SVTS A 03 22mm up to 36 2, 6 or 8A up to 240V 250rpm Ethernet, IP65 Order
ES 22mm up to 56 2A up to 240V 250rpm High Quality Order
SVTS A 04 25mm up to 56 2, 6 or 8A up to 240V 250rpm Ethernet, IP65 Order