Capsule slip rings
Meridian Laboratory ROTOCON M series (end-of-shaft) capsule slip ring
Brushless end-of-shaft slip rings with 1 to 50 standard contacts (up to 100), up to 35 A per contact, 600 V standard or 3,500 V optional, contact resistance below 0.1 mΩ, up to 1 GHz and IP67 304 stainless housings.
Key specifications
| Circuits (max) | 100 |
|---|---|
| Current per circuit (max) | 35 A |
| Voltage (max) | 3,500 V |
| Ingress protection | up to IP67 |
| Temperature (max) | 70 °C |
| RF frequency (max) | 1 GHz |
| Noise | <0.01 µV |
| Housing | 304 stainless steel |
Summarised in our own words from Meridian Laboratory's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
RPM is model-dependent; no series maximum published.
Specify Motion is not affiliated with Meridian Laboratory. Meridian Laboratory and ROTOCON M series (end-of-shaft) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
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Our experienced engineers are on hand, ready to help with your project. Whether you need the Meridian Laboratory ROTOCON M series (end-of-shaft) itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
- Help sourcing ROTOCON M series (end-of-shaft) and spares for installed machines
- Modified and custom designs when a catalogue part doesn't fit
- Complete axis: motor, drive, gearing and feedback matched together
What a capsule slip ring is
A capsule slip ring is a compact, solid-centre rotary electrical joint that passes power and signals from a fixed frame to a rotating assembly. Precious-metal brushes, usually gold on gold, ride on a stack of small-diameter rings inside a sealed cylindrical housing, so surface speed, contact noise and wear all stay low. Because there is no bore, the unit sits on the axis of rotation, typically fixed by a flange at one end with flying leads leaving each side. Capsules carry many signal circuits and modest power in a very small envelope.
When engineers choose a capsule slip ring
Choose a capsule when the centre of the rotating axis is free and space is tight, as in camera heads, small turntables, sensor heads and robot wrists. Small rings give low drag torque, low electrical noise and long life, which suits analogue, encoder and low-level data signals. The trade-offs are current and access: power rings are typically limited to a few amps each, and nothing can pass through the middle. If a shaft, hose or cable must run along the axis, a through-bore design is the better fit.
How to specify the Meridian Laboratory ROTOCON M series (end-of-shaft)
Send these with your enquiry and an engineer can confirm the right ROTOCON M series (end-of-shaft) variant or an equivalent:
- Number of circuits, split into power, signal and data
- Current per circuit (A) and working voltage (V AC or DC)
- Maximum and continuous speed (rpm)
- Envelope: outer diameter and length (mm)
- Signal types: analogue, encoder, RS485, CAN, Ethernet or video
- Ingress protection (IP code) and temperature range (°C)
- Lead length, wire gauge and connector terminations
Common mistakes to avoid
- Pushing one ring past its current rating instead of paralleling two or more rings per conductor
- Mixing motor power and low-level signals on adjacent rings without screening or allocation planning
- Fixing the rotor rigidly to a shaft that runs out, so bearing loads go through the capsule
- Letting the leads act as the anti-rotation device instead of fitting a proper torque strap or pin
Meridian Laboratory ROTOCON M series (end-of-shaft): frequently asked questions
What is the Meridian Laboratory ROTOCON M series (end-of-shaft)?
Brushless end-of-shaft slip rings with 1 to 50 standard contacts (up to 100), up to 35 A per contact, 600 V standard or 3,500 V optional, contact resistance below 0.1 mΩ, up to 1 GHz and IP67 304 stainless housings. Published series figures include circuits 100, current per circuit 35 A, voltage 3,500 V, temperature 70 °C. It is made by Meridian Laboratory; Specify Motion can help source it or propose an equivalent.
Who makes the Meridian Laboratory ROTOCON M series (end-of-shaft)?
The Meridian Laboratory ROTOCON M series (end-of-shaft) is made by Meridian Laboratory and is listed here for engineers comparing options. Specify Motion is not affiliated with Meridian Laboratory; brand names are used only to identify the product.
What is the circuits of the Meridian Laboratory ROTOCON M series (end-of-shaft)?
The published series maximum circuits is 100. Individual models and sizes in the ROTOCON M series (end-of-shaft) range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Meridian Laboratory ROTOCON M series (end-of-shaft)?
Yes. Our engineers can propose an equivalent built around your load, speed and environment. An engineer confirms the fit against your application before recommending anything.
What is the difference between a capsule and a through-bore slip ring?
A capsule slip ring has no central hole and mounts on the end of the rotating axis, which keeps the rings small, drag torque low and life long. A through-bore slip ring has a hollow centre so a shaft, air line or cable can pass along the axis. At equal rpm, through-bore rings run at a higher surface speed and are larger, so choose by whether the axis is free.
How much current can a capsule slip ring carry?
Signal rings in a capsule typically carry well under an amp, while dedicated power rings are commonly rated at a few amps up to around 10 A depending on the design. For a heavier load, several rings are paralleled on one conductor, which uses up circuit count and length. If the machine needs tens of amps, a through-bore or purpose-built high-current unit is usually more practical.
Further reading: How to select a slip ring · How to specify a slip ring · Slip rings
Other capsule slip rings series
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Tell us about your project and how you use the Meridian Laboratory ROTOCON M series (end-of-shaft): the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
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