Capsule slip rings
Moog Rotoflux ESR 110 capsule slip ring
110 mm diameter gold/gold slip ring with up to 32 circuits at 30 A, IP64, with an optional air channel.
Need this part, a replacement or a complete package? Our experienced UK engineering team helps you select, source and obtain the right products, with pricing, delivery coordination and after-sales support.
Pricing and availability
Get pricing, sourcing and replacement support
Need Moog parts, a replacement or a suitable alternative? Send us a part number, or tell us what the machine needs to do. Our UK engineers will come back with the right product, pricing, lead time and delivery, whether that is the original part, a checked alternative or a complete axis.
- Original parts or a checked alternative
- Pricing, lead time and delivery in one reply
- Components, complete axes and ongoing support
No obligation. Add what you know and an engineer will help with the rest. Prefer to configure it? Build a specification.
Spec builder
Specify what you need instead of Rotoflux ESR 110
Select every part you need and answer the questions an applications engineer would ask. Our engineers use your specification to come back with the right products, pricing and lead times. You see your summary before we ask for any details.
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- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Circuits (max) | 32 |
|---|---|
| Current per circuit (max) | 30 A |
| Voltage (max) | 480 V |
| Speed (max) | 150 rpm |
| Outer diameter | 110–110 mm |
| Ingress protection | IP64 |
| Data / bus | PROFIBUS, CAN Bus, Ethernet, DeviceNet, PROFINET |
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
Optional air channel G1/2" at 10 bar.
Specify Motion is not affiliated with Moog Inc.. Moog and Rotoflux ESR 110 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Engineer support
Speak to our engineers about your project
Our experienced engineers are on hand, ready to help with your project. Whether you need the Moog Rotoflux ESR 110 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 Rotoflux ESR 110 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
Typical applications
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 Moog Rotoflux ESR 110
Send these with your enquiry and an engineer can confirm the right Rotoflux ESR 110 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
Moog Rotoflux ESR 110: frequently asked questions
Can you help replace Moog Rotoflux ESR 110 or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Moog Rotoflux ESR 110?
110 mm diameter gold/gold slip ring with up to 32 circuits at 30 A, IP64, with an optional air channel. Published series figures include circuits 32, current per circuit 30 A, voltage 480 V, speed 150 rpm. It is made by Moog Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the Moog Rotoflux ESR 110?
The Moog Rotoflux ESR 110 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 circuits of the Moog Rotoflux ESR 110?
The published series maximum circuits is 32. Individual models and sizes in the Rotoflux ESR 110 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 Rotoflux ESR 110?
We can assess suitable replacement options. Our engineers can review the original model and propose options for 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
Engineer support
Our engineers are ready to help with your project
Tell us about your project and how you use the Moog Rotoflux ESR 110: the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
Prefer to configure it? Use the spec builder.
How it works
From enquiry to delivery
Send a part number or describe the application. Our engineers take it from there: the right product, a clear quotation, and delivery and support arranged.
- 01Tell us what you needSend a part number, or configure the application, quantities and timing.
- 02An engineer reviews itWe check the specification and find the original part, a checked equivalent or a complete axis.
- 03Receive your quotationProducts, pricing, lead time and compatibility notes in one reply.
- 04Order and deliveryWhen you are happy, the order is placed and delivery and after-sales support are arranged.