Slip Rings
Transfer power, signal, data, fluid and light across a continuously rotating joint. Five catalog series, plus hybrid assemblies that combine them in one housing.
Catalog series
Choose by what crosses the joint.
Every series can be modified — ring count, bore, housing, connectors and sealing — to fit your envelope.
L-HH-01-001
Signal Slip Rings
Low-noise transfer of control and sensor signals with a choice of contact materials.
| Voltage | 0–690 V |
| Current | ≤ 200 A |
| Protection | IP51 – IP67 |
L-HH-01-002
Power Slip Rings
High-voltage, high-current rings for generators, cranes, turrets and heavy rotating machinery.
| Voltage | 0–10 kV |
| Current | ≤ 5,000 A |
| Speed | ≤ 6,000 rpm |
L-HH-01-003
Communication Slip Rings
Field-bus and Ethernet channels engineered for signal integrity through rotation.
| Current | ≤ 5 A |
| Protocols | RS-232/422/485, CAN |
| Ethernet | Up to 1000BASE-T |
L-HH-02-001
Fluid Rotary Unions
Multi-passage unions for coolant, hydraulic oil, air and gas through a rotating shaft.
| Passages | 2 – 20+ |
| Pressure | 0–35 MPa |
| Media | Water, oil, air, gas |
L-HH-03-001
Fiber-Optic Rotary Joints
Single and multi-channel optical joints for high-bandwidth, EMI-immune data links.
| Channels | 1 to ≥ 5 |
| Wavelength | 850–1550 nm |
| Insertion loss | ≤ 2–4 dB |
Configured to order
Hybrid & non-contact assemblies
Electrical, fluid and fiber channels combined in one rotary assembly — one interface to mount, seal and maintain.
Engineered builds
When the catalog isn’t enough.
Custom assemblies delivered for ships, radar vehicles, wind turbines and subsea equipment.
Marine · integrated
Podded-propulsion slip ring
4 × AC 3,300 V / 2,600 A power, 12 fluid passages to 25 MPa, 190 signal circuits.
Radar · photo-electric-fluid
Power, fiber and coolant in one joint
0–200 rpm · 2 liquid paths, 4.5 m³/h at 1.6 MPa, DN25 · Gigabit Ethernet and multi-channel fiber.
Radar · photo-electric
Fiber-optic and electrical slip ring
0–120 rpm · power, control, Gigabit Ethernet and video plus multi-channel fiber, for radar vehicles and aircraft pods.
Subsea
Deep-water slip ring
Long-term service below 2,000 m · titanium alloy body · 2 t axial load · power, control, Ethernet and video.
Wind energy
Pitch-system slip ring
AC 400 V / 50–130 A power · DC 24 V + Profibus, CAN or Ethernet · ≤ 20 rpm · IP65.
Fluid · gas
Gas rotary union
Air, nitrogen, hydrogen and mixed gases · 1,000 rpm · IP68 · quick-connect ports.
Selection guide
Four questions before you specify.
Answer these and an engineer can usually recommend a series on the first call.
01
What crosses the joint?
Power, signal, data, fluid, light — or a combination. This picks the series.
02
Electrical load
Circuit count, voltage and current per circuit, and any shielded or bus lines.
03
Speed and duty
Continuous rpm, start/stop cycles and required service life.
04
Envelope and environment
Bore, outer diameter, mounting, IP rating, temperature and vibration.
Not sure which series fits?
Send your circuit count, current, speed and environment. We’ll recommend a series or a custom build.