Large-diameter slip rings
Moog Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311)
Platter and drum style slip rings for very large rotating structures, with optional fibre optic or non-contacting high-speed data links and integrated encoders.
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Need Moog parts, a replacement or another suitable option? Send your part number or describe what the machine needs to do. We connect your requirement with experienced UK engineering and procurement support to help you get the right products, pricing and supply options. Your matched provider can take the enquiry through quotation and ordering to delivery and after-sales support.
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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
| Current per circuit (max) | 300 A |
|---|---|
| Voltage (max) | 1,000 V |
| Speed (max) | 300 rpm |
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
Range figures: diameters over 70 in (1.7 m), power rings up to 1000 V / 300 A, up to 300 rpm. Listed parts: high power 100 A, 380-600 VAC, 120-180 rpm; ID/OD published without units (e.g. CT6970 44.291/59.916), so not entered. FORJ option >40 Gb/s aggregate; NCDL >5 Gb/s.
Specify Motion is not affiliated with Moog Inc.. Moog and Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) 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 Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) 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 Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) 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 large-diameter slip ring is
A large-diameter slip ring is a rotary joint with a bore or ring diameter typically of several hundred millimetres up to a few metres, built for very large rotating structures. The rings are often fabricated in segments or machined as drums or platters, with brush blocks mounted around the stationary frame. Because the structure is large, they are usually designed to match the customer's machine and may integrate power, signal, data, fibre or contactless channels and media passages in one assembly.
When engineers choose a large-diameter slip ring
Choose a large-diameter design when the rotating structure has a big central opening, such as CT gantries, large turntables, radar pedestals, cranes and slewing platforms, or when cabling and services must pass through a wide bore. The trade-offs are cost, lead time and high surface speed even at modest rpm, which limits speed and raises brush wear. Mechanical runout of the machine becomes significant at this scale, so the slip ring is usually designed alongside the structure rather than chosen from a catalogue.
How to specify the Moog Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311)
Send these with your enquiry and an engineer can confirm the right Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) variant or an equivalent:
- Bore and outer diameter limits (mm)
- Speed and surface speed (rpm, m/s)
- Power circuits, current and voltage (A, V)
- Data rates and channels, including contactless or fibre
- Structure runout and flatness at the mounting faces (mm)
- Environment: outdoor exposure, IP code and temperature (°C)
- Segmentation for installation and maintenance access
Common mistakes to avoid
- Specifying late, when the structure leaves too little room or too much runout for the slip ring
- Using the catalogue rpm without checking surface speed at the actual diameter
- Not planning how the ring will be lifted, installed and serviced in place
- Leaving out data rate growth, so the channel count is outgrown within the machine's life
Moog Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311): frequently asked questions
Can you help replace Moog Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) 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 Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311)?
Platter and drum style slip rings for very large rotating structures, with optional fibre optic or non-contacting high-speed data links and integrated encoders. Published series figures include current per circuit 300 A, voltage 1,000 V, speed 300 rpm. It is made by Moog Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the Moog Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311)?
The Moog Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) 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 Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311)?
The published series maximum current per circuit is 300 A. Individual models and sizes in the Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311) 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 Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311)?
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.
Why do large slip rings have lower speed ratings?
Surface speed is diameter multiplied by rotational speed, so a ring a metre across turning at 60 rpm already runs faster at the contact than a small capsule at a thousand rpm. Brush wear, heat and contact bounce all rise with surface speed. Large-diameter designs manage this with brush materials, contact force and runout control, but their rpm ratings are typically far lower.
How is high-speed data passed through a large-diameter slip ring?
Contact rings work for slower networks, but for very high data rates, such as CT image data, large rings often use contactless capacitive, inductive or optical transmission around the circumference. A fibre optic rotary joint can also be placed on the axis if the centre is accessible. State the data rate and latency requirements early, as they shape the whole design.
Further reading: How to select a slip ring · How to select a fibre optic rotary joint · Slip rings
Other large-diameter 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 Large Diameter Slip Rings (CT6455, CT6536, CT6764, CT6970, CT7013, CT7093, CT7138, CT7311): the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
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