Slip rings
SCHLEIFRING Wind turbine pitch slip ring
Modular slip ring for blade-pitch systems on onshore and offshore wind turbines, carrying power plus fieldbus or contactless Ethernet.
Key specifications
| Current per circuit (max) | 115 A |
|---|---|
| Voltage (max) | 480 V |
| Speed (max) | 30 rpm |
| Ingress protection | IP65 |
| Temperature | -40–55 °C |
| Data / bus | CAN bus, PROFIBUS, Ethernet, GigaCAP contactless 100 Mbit/s |
| Rated life (revolutions) | 50,000,000 |
Summarised in our own words from Schleifring GmbH's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1
Notes on this data
Housing 155 x 155 mm, length 262/316/368 mm (S/M/L). Silver multi-fibre brushes. 480 V / 115 A as stated (whether per circuit is not explicit). Circuit count not published.
Specify Motion is not affiliated with Schleifring GmbH. SCHLEIFRING and Wind turbine pitch slip ring 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 SCHLEIFRING 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.
High-circuit-count slip rings that carry hundreds of mixed power, digital, analogue, fibre and RF channels in one unit.
| Published maximum | Wind turbine pitch slip ring | Multi-channel Slip Ring |
|---|---|---|
| Circuits | — | 500 |
| Current per circuit | 115 A | 30 A |
| Speed | 30 rpm | 480 rpm meets or exceeds |
| Voltage | 480 V | 700 V meets or exceeds |
| Bore | — | 40 mm |
Slip rings using heat-resistant materials for extreme temperatures from -55°C to +250°C, such as hot rollers and heating plant.
| Published maximum | Wind turbine pitch slip ring | High & Low Temperature Slip Ring |
|---|---|---|
| Circuits | — | 48 |
| Current per circuit | 115 A | 50 A |
| Speed | 30 rpm | — |
| Voltage | 480 V | 500 V meets or exceeds |
| Bore | — | 88 mm |
A small analogue power-and-signal slip ring with FASTON quick-connect terminals for fast wiring in dusty, high-cycle machinery. Optional IP65 sealing.
View HR Series Faston Type Slip Ring →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 slip ring is
This group covers slip rings that do not fit a single standard format, including modular and split designs, contactless capacitive or optical data rings, temperature-rated units, quick-connect terminal designs, very high circuit counts and application-specific assemblies for wind turbines or packaging. All solve the same problem: transferring power, signals or data between stationary and rotating parts of a machine. What differs is the construction, which may be a split housing, a modular stack, a non-contact data path or a special material set.
When engineers choose a slip ring
Engineers look at these designs when a standard capsule, through-bore or pancake unit does not fit the job. Split rings suit retrofits onto existing shafts. Contactless data rings suit high data rates or long life without wear. Modular units allow circuit counts to change between machine variants. The trade-offs are cost, availability and, for custom designs, longer lead times and qualification. Match the construction to the real constraint, whether that is installation, data, temperature or circuit count.
How to specify the SCHLEIFRING Wind turbine pitch slip ring
Send these with your enquiry and an engineer can confirm the right Wind turbine pitch slip ring variant or an equivalent:
- What makes the application non-standard: installation, data, temperature, circuit count or format
- Circuits, current and voltage (A, V)
- Data protocols and rates
- Speed (rpm) and expected life (revolutions)
- Bore, envelope and mounting (mm)
- Temperature range (°C) and IP code
- Terminations, such as flying leads, connectors or quick-connect tabs
Common mistakes to avoid
- Choosing a special design when a standard type with minor changes would do
- Not stating the actual constraint, so the supplier offers the wrong format
- Assuming contactless data channels also carry power
- Underestimating lead time for custom or modular builds
SCHLEIFRING Wind turbine pitch slip ring: frequently asked questions
What is the SCHLEIFRING Wind turbine pitch slip ring?
Modular slip ring for blade-pitch systems on onshore and offshore wind turbines, carrying power plus fieldbus or contactless Ethernet. Published series figures include current per circuit 115 A, voltage 480 V, speed 30 rpm, temperature -40 °C. It is made by Schleifring GmbH; Specify Motion can help source it or propose an equivalent.
Who makes the SCHLEIFRING Wind turbine pitch slip ring?
The SCHLEIFRING Wind turbine pitch slip ring is made by SCHLEIFRING (Schleifring GmbH) and is listed here for engineers comparing options. Specify Motion is not affiliated with Schleifring GmbH; brand names are used only to identify the product.
What is the current per circuit of the SCHLEIFRING Wind turbine pitch slip ring?
The published series maximum current per circuit is 115 A. Individual models and sizes in the Wind turbine pitch slip ring 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 SCHLEIFRING Wind turbine pitch slip ring?
Yes. On published figures, Multi-channel Slip Ring and High & Low Temperature Slip Ring are the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
What is a split slip ring?
A split slip ring has a rotor and housing made in two halves, so it can be fitted around an existing shaft without removing the shaft or its bearings. It suits retrofits and large machines where disassembly would be costly. Expect tighter installation tolerances and possibly a lower speed rating than a one-piece unit.
What is a contactless slip ring?
A contactless slip ring transfers data, and sometimes power, across rotation without sliding contacts, using capacitive, inductive or optical coupling. There is no wear on the data path, so life is long and very high data rates are possible. Contactless power is usually limited, so many designs combine a contactless data channel with conventional power rings.
Further reading: How to select a slip ring · How to specify a slip ring · Slip rings
Other slip rings series
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Tell us how you use the SCHLEIFRING Wind turbine pitch slip ring: the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
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