Slip ringsDiscontinued
LTN Servotechnik SR/SH085 slip rings
Compact slip ring family with up to 16 poles for power and data, built for vibration and shock with high-speed options, aimed at packaging and side-sealing machines.
LTN Servotechnik lists this series as discontinued. We can help with spares for installed machines, a migration to the replacement, or an alternative. Find a replacement.
Key specifications
| Circuits (max) | 16 |
|---|
Summarised in our own words from HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026)'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1 · Source 2
Notes on this data
HEIDENHAIN states LTN slip rings are discontinued. Deublin says it acquired select LTN slip ring models, but no named replacement is given. LTN Servotechnik GmbH ceased operations on 30 April 2026; HEIDENHAIN continues LTN resolvers.
Specify Motion is not affiliated with HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026). LTN Servotechnik and SR/SH085 slip rings 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 LTN Servotechnik part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 2 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 | SR/SH085 slip rings | Multi-channel Slip Ring |
|---|---|---|
| Circuits | 16 | 500 meets or exceeds |
| Current per circuit | — | 30 A |
| Speed | — | 480 rpm |
| Voltage | — | 700 V |
| 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 | SR/SH085 slip rings | High & Low Temperature Slip Ring |
|---|---|---|
| Circuits | 16 | 48 meets or exceeds |
| Current per circuit | — | 50 A |
| Voltage | — | 500 V |
| Bore | — | 88 mm |
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 LTN Servotechnik SR/SH085 slip rings
Send these with your enquiry and an engineer can confirm the right SR/SH085 slip rings 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
LTN Servotechnik SR/SH085 slip rings: frequently asked questions
What is the LTN Servotechnik SR/SH085 slip rings?
Compact slip ring family with up to 16 poles for power and data, built for vibration and shock with high-speed options, aimed at packaging and side-sealing machines. Published series figures include circuits 16. It is made by HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026); Specify Motion can help source it or propose an equivalent.
Who makes the LTN Servotechnik SR/SH085 slip rings?
The LTN Servotechnik SR/SH085 slip rings is made by LTN Servotechnik (HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026)) and is listed here for engineers comparing options. Specify Motion is not affiliated with HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026); brand names are used only to identify the product.
What is the circuits of the LTN Servotechnik SR/SH085 slip rings?
The published series maximum circuits is 16. Individual models and sizes in the SR/SH085 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 the LTN Servotechnik SR/SH085 slip rings still available?
LTN Servotechnik lists the SR/SH085 slip rings as discontinued. We can help with spares for installed machines, a migration, or an equivalent from our supply network that meets the same published figures.
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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