Slip rings
Stemmann-Technik Explosion-proof slip ring assemblies
Slip ring assemblies for explosion-hazard areas in pressurised or flameproof (pressure-resistant) enclosures, configured to the customer's zone and temperature class, for example with a 300 mm central bore and an added fibre optic rotary joint.
Key specifications
| Bore (max) | 300 mm |
|---|---|
| Protection | pressurised enclosure or pressure-resistant casing; zone and temperature class to customer specification |
| Options | fibre optic rotary joint, media through the bore |
Summarised in our own words from Wabtec Corporation's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
No Ex marking, current or voltage figures published on the page.
Specify Motion is not affiliated with Wabtec Corporation. Stemmann-Technik and Explosion-proof slip ring assemblies 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 Stemmann-Technik part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These series from our supply network is the closest match on published figures.
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 Stemmann-Technik Explosion-proof slip ring assemblies
Send these with your enquiry and an engineer can confirm the right Explosion-proof slip ring assemblies 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
Stemmann-Technik Explosion-proof slip ring assemblies: frequently asked questions
What is the Stemmann-Technik Explosion-proof slip ring assemblies?
Slip ring assemblies for explosion-hazard areas in pressurised or flameproof (pressure-resistant) enclosures, configured to the customer's zone and temperature class, for example with a 300 mm central bore and an added fibre optic rotary joint. Published series figures include bore 300 mm. It is made by Wabtec Corporation; Specify Motion can help source it or propose an equivalent.
Who makes the Stemmann-Technik Explosion-proof slip ring assemblies?
The Stemmann-Technik Explosion-proof slip ring assemblies is made by Stemmann-Technik (Wabtec Corporation) and is listed here for engineers comparing options. Specify Motion is not affiliated with Wabtec Corporation; brand names are used only to identify the product.
What is the bore of the Stemmann-Technik Explosion-proof slip ring assemblies?
The published series maximum bore is 300 mm. Individual models and sizes in the Explosion-proof slip ring assemblies 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 Stemmann-Technik Explosion-proof slip ring assemblies?
Yes. On published figures, HR Series Faston Type Slip Ring is 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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