Marine and subsea slip rings
Moog Model 180 marine and subsea slip ring
Compact marine slip ring rated to 1 kV, available with integrated FORJ of up to 12 singlemode and 12 multimode passes.
Key specifications
| Current per circuit (max) | 7 A |
|---|---|
| Voltage (max) | 1,000 V |
| Speed (max) | 100 rpm |
| Outer diameter | 72.4–72.4 mm |
| Fibre channels (max) | 24 |
Summarised in our own words from Moog Inc.'s published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
100 A total. fibre_channels_max = 12 SM + 12 MM.
Specify Motion is not affiliated with Moog Inc.. Moog and Model 180 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Moog part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
Sealed slip rings rated IP64 to IP68 for wet, washdown and marine settings such as ships and harbour equipment.
| Published maximum | Model 180 | Waterproof Slip Ring |
|---|---|---|
| Circuits | — | 44 |
| Current per circuit | 7 A | 85 A meets or exceeds |
| Speed | 100 rpm | 600 rpm meets or exceeds |
| Voltage | 1,000 V | 1,100 V meets or exceeds |
| Bore | — | 127 mm |
| Fibre channels | 24 | — |
Fibre optic rotary joints that carry single-mode or multi-mode optical channels across rotation for high-bandwidth, interference-free data. Channel counts run from one to fifty.
| Published maximum | Model 180 | FR Series Fiber Optic Rotary Joint |
|---|---|---|
| Current per circuit | 7 A | — |
| Speed | 100 rpm | 2,000 rpm meets or exceeds |
| Voltage | 1,000 V | — |
| Fibre channels | 24 | 50 meets or exceeds |
Slip rings that keep USB and IEEE1394 links working through continuous 360-degree rotation, combined with power circuits.
| Published maximum | Model 180 | USB Slip Ring |
|---|---|---|
| Circuits | — | 32 |
| Current per circuit | 7 A | 20 A meets or exceeds |
| Speed | 100 rpm | 300 rpm meets or exceeds |
| Voltage | 1,000 V | — |
| Bore | — | 38.1 mm |
| Fibre channels | 24 | — |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
What a marine and subsea slip ring is
A marine slip ring is a rotary joint built to survive salt air, spray, condensation and, for subsea versions, immersion and external pressure. The electrical design is conventional, with power, signal and data rings, but the housing uses corrosion-resistant materials such as stainless steel or marine-grade aluminium, robust shaft seals and suitable connectors. Subsea units are commonly oil-filled and pressure-compensated so internal pressure matches the surrounding water, which keeps seals working at depth.
When engineers choose a marine and subsea slip ring
Choose a marine design for deck winches, cranes, mooring and cable reels on ships and offshore platforms, and for ROVs and other subsea vehicles. A standard industrial unit in an enclosure is sometimes adequate in sheltered locations, but salt and condensation shorten life quickly. The trade-offs are size, weight, cost and lead time. For subsea work, compensated designs add complexity but avoid relying on seals to hold back full pressure. Fibre and high-voltage channels are often needed alongside power.
How to specify the Moog Model 180
Send these with your enquiry and an engineer can confirm the right Model 180 variant or an equivalent:
- Location: deck, splash zone or subsea, with depth rating (m)
- Ingress protection (IP code) and pressure compensation method
- Housing and shaft materials
- Power circuits, current and voltage (A, V)
- Data or fibre channels
- Speed (rpm) and duty
- Connectors, glands and cable types
Common mistakes to avoid
- Using an industrial slip ring in a box on deck, where condensation forms inside
- Mixing metals that corrode galvanically in seawater
- Overlooking high-voltage clearance on winch slip rings feeding subsea power
- Not specifying compensation fluid and service intervals for oil-filled designs
Moog Model 180: frequently asked questions
What is the Moog Model 180?
Compact marine slip ring rated to 1 kV, available with integrated FORJ of up to 12 singlemode and 12 multimode passes. Published series figures include current per circuit 7 A, voltage 1,000 V, speed 100 rpm, outer diameter 72.4 mm. It is made by Moog Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the Moog Model 180?
The Moog Model 180 is made by Moog (Moog Inc.) and is listed here for engineers comparing options. Specify Motion is not affiliated with Moog Inc.; brand names are used only to identify the product.
What is the current per circuit of the Moog Model 180?
The published series maximum current per circuit is 7 A. Individual models and sizes in the Model 180 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 Moog Model 180?
Yes. On published figures, Waterproof Slip Ring and FR Series Fiber Optic Rotary Joint are the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
What does pressure-compensated mean for a subsea slip ring?
A pressure-compensated slip ring is filled with an insulating oil and linked to a flexible bladder or piston that lets the surrounding water pressure act on the oil. Inside and outside pressures stay nearly equal, so seals only have to keep fluid in, not resist full depth pressure. This is common for ROV and deep-water equipment because it makes depth rating far less dependent on wall thickness.
Is IP68 enough for a marine slip ring?
IP68 means protected against continuous immersion under conditions agreed by the manufacturer, so the actual depth and duration must be stated alongside it. It does not cover corrosion, UV, salt fog or pressure cycling. For deck equipment, specify materials and sealing for salt spray and condensation. For subsea, give the rated depth and test pressure, not just an IP code.
Further reading: Waterproof and subsea slip rings · How to select a slip ring · Slip rings
Other marine and subsea slip rings series
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