Contactless rotary data link
Moog ROTOCAP (CAP 160/220/350/400) contactless rotary data link
Contactless capacitive data ring for transferring industrial Ethernet across rotation, often paired with contact power tracks or rotary unions.
Key specifications
| Speed (max) | 500 rpm |
|---|---|
| Bore | 0–250 mm |
| Outer diameter | 160–400 mm |
| Temperature | 0–70 °C |
| Data / bus | PROFINET, SERCOS III, POWERLINK, EtherCAT, MECHATROLINK-III, FANUC FSSB, Gigabit Ethernet |
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
Notes on this data
Data rates 100 Mbit/s to 2.5 Gbit/s. Product guide lists CAP 160 (0-45 mm bore) and CAP 200 (0-40 mm), IP64, 150 rpm; datasheet (Rev A 2020) lists CAP 160/220/350/400 and 500 rpm base — datasheet values used.
Specify Motion is not affiliated with Moog Inc.. Moog and ROTOCAP (CAP 160/220/350/400) 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.
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 | ROTOCAP (CAP 160/220/350/400) | FR Series Fiber Optic Rotary Joint |
|---|---|---|
| Speed | 500 rpm | 2,000 rpm meets or exceeds |
| Bore | 250 mm | — |
| Fibre channels | — | 50 |
RF rotary joints that carry microwave signals across rotation for antennas and radar, with one to five channels. Single-channel models run to 50 GHz.
| Published maximum | ROTOCAP (CAP 160/220/350/400) | RR Series Radio Frequency Rotary Joint |
|---|---|---|
| Speed | 500 rpm | 500 rpm meets or exceeds |
| Bore | 250 mm | — |
Slip rings built for 800 to 15,000 rpm, mainly used on test rigs and non-destructive testing equipment.
| Published maximum | ROTOCAP (CAP 160/220/350/400) | High Speed Slip Ring |
|---|---|---|
| Speed | 500 rpm | 15,000 rpm meets or exceeds |
| Bore | 250 mm | — |
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.
Moog ROTOCAP (CAP 160/220/350/400): frequently asked questions
What is the Moog ROTOCAP (CAP 160/220/350/400)?
Contactless capacitive data ring for transferring industrial Ethernet across rotation, often paired with contact power tracks or rotary unions. Published series figures include speed 500 rpm, bore 0 mm, bore 250 mm, outer diameter 160 mm. It is made by Moog Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the Moog ROTOCAP (CAP 160/220/350/400)?
The Moog ROTOCAP (CAP 160/220/350/400) 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 speed of the Moog ROTOCAP (CAP 160/220/350/400)?
The published series maximum speed is 500 rpm. Individual models and sizes in the ROTOCAP (CAP 160/220/350/400) 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 ROTOCAP (CAP 160/220/350/400)?
Yes. On published figures, FR Series Fiber Optic Rotary Joint and RR Series Radio Frequency Rotary Joint are the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
Other contactless rotary data link series
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