Capsule slip rings
Senring M Series capsule slip rings
Capsule slip rings from 6.5 mm diameter (M065) to 30 mm (M300), up to 56 circuits (M250) and power rings up to 30 A on the larger models, for control, video, HD and Ethernet signals.
Need this part, a replacement or a better-fit option? Our engineers help with selection, procurement, sourcing, competitive pricing and lead times.
Engineering support · Product sourcing · Procurement
Get pricing or a checked replacement
Need Senring parts, a replacement or another suitable option? Send your part number or describe the application. We’ll review the requirement and help with product selection, sourcing, pricing and lead times.
- Exact parts and engineer-checked alternatives
- Manufacturer-direct options where available
- Standard, modified and custom solutions
No obligation to buy. Have a datasheet, drawing or nameplate photo? Reply to your confirmation email to attach it.
Need help choosing? Build a specification →Need help choosing? Open the specification builder
Spec builder
Specify what you need instead of M Series capsule slip rings
Select every part you need, answer the questions an applications engineer would ask, and see your summary before we ask for any details.
- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
Key specifications
| Circuits (max) | 56 |
|---|---|
| Current per circuit (max) | 30 A |
| Outer diameter | 6.5–30 mm |
Summarised in our own words from SENRING Electronics Co., Limited's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Voltage, speed, IP and temperature not published on the series page; page has current inconsistencies for M300.
Specify Motion is not affiliated with SENRING Electronics Co., Limited. Senring and M Series capsule slip rings 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 Senring M Series capsule slip rings 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 M Series capsule slip rings 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 Senring M Series capsule slip rings
Send these with your enquiry and an engineer can confirm the right M Series capsule slip rings 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
Senring M Series capsule slip rings: frequently asked questions
Can you help replace Senring M Series capsule slip rings 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 Motion Control Products options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Senring M Series capsule slip rings?
Capsule slip rings from 6.5 mm diameter (M065) to 30 mm (M300), up to 56 circuits (M250) and power rings up to 30 A on the larger models, for control, video, HD and Ethernet signals. Published series figures include circuits 56, current per circuit 30 A, outer diameter 6.5 mm, outer diameter 30 mm. It is made by SENRING Electronics Co., Limited; Specify Motion can help source it or propose an equivalent.
Who makes the Senring M Series capsule slip rings?
The Senring M Series capsule slip rings is made by Senring (SENRING Electronics Co., Limited) and is listed here for engineers comparing options. Specify Motion is not affiliated with SENRING Electronics Co., Limited; brand names are used only to identify the product.
What is the circuits of the Senring M Series capsule slip rings?
The published series maximum circuits is 56. Individual models and sizes in the M Series capsule slip rings 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 Senring M Series capsule slip rings?
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 Senring M Series capsule slip rings: 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.