High Speed Slip Rings

Our high speed slip rings are used worldwide for development and experimental testing of gas turbines and high speed rotating machinery

High Speed Slip Rings

Aerodyn manufacture a range of high speed data quality slip rings for advanced technology rotating measurements.

The slip rings provide clean and quiet signals, with long life and high contact density. Typical applications include strain and temperature surveys, shaft torque and bending measurements, and power transfer on/off the rotor.

Standard slip ring sizes range from 16 contacts to 744 contacts that can rotate up to 100,000rpm. For sizes and speeds not covered in the standard range please contact us to discuss your individual requirements.

Features & Specifications

  • Signal transmission:
    • Sensors – thermocouple, strain gage (static and dynamic), pressure transducer, RTD, digital signal
    • Power – AC or DC, high voltage, high current
  • Low noise signal transfer < 250 microvolts pk-pk noise at any discrete frequency (25mA drive current)
  • Durability >100 million revolutions
  • Spin test services
  • Environmentally friendly coolants (non-CFC)
  • Gold alloy contacts
  • Grease or oil mist bearing configurations (application speed dependent)
  • Multi-pin mil-spec connectors
  • Precision ground shafts
  • Intermediate Bearing Assemblies (IBA) for ease of installation and quick disconnect

Custom Designs

We can provide your business with custom slip ring designs for the most challenging applications, whether it be restrictions on available space to install the slip ring or the operating environment.

We will design and fabricate the installation, adapting hardware for interface between rotating machinery and slip rings. In addition, we will assemble and spin test the complete system to ensure proper fit and component stack-up. Maintaining these operations in-house allows a full system checkout prior to test, eliminating unforeseen problems and costly delays.

Installation designs can include cooling cans for hot end installations, sealing arrangements for lead-wires exiting the engine shaft, and complicated outer-race rotating installations. Our extensive experience allows us to create custom designs to meet challenging applications.

  • Intermediate bearing assemblies with multiple termination capability (for example, 200 termination contacts monitored by a 100 contact slip ring)
  • On-rotor multiplexing switches to monitor a greater number of channels
  • Small size, high speed rings – up to 150,000rpm
  • Automotive transmission slip rings
  • Flight test slip rings
  • Silver graphite slip rings for blade-off testing and power applications
  • Environmental cooling systems
  • Custom designs – pancake, through bore and nosecone:
    • 2 contacts to 1000 contacts
    • signal to high power (1000+ Amps)
    • high voltage (up to 100,000 volts ring to ring)
    • integrated rotary union
    • fiber optics, RF or HR union as required
    • ethernet and data protocols

Cooling Systems

We design and manufacture our own line of cooling carts. Our cooling carts will supply filtered coolant to the slip ring while in operation. Our cooling units are extremely reliable and are designed and manufactured with the highest quality components and craftsmanship available in the industry today. Magnetically coupled pumps are employed within our system to deliver the cooling fluid, with full user instruments showing flow rate and system pressures.

Our cooling systems are equipped with battery backup to assure continued operation in the event of a site power failure.


Pump Magnetically coupled gear pump
Flow Rate 0 – 1 GPM
Tank Stainless steel, five-gallon capacity
Heat Rejection 2,500 BTU/hr, air/fluid heat exchanger
Filtration 5 micron sintered stainless steel filter
Voltage 110/220 VAC, 50/60 HZ
Power Less than 700 watts
Battery Backup Provides 30 minutes of operation after AC power failure
Controls On/off (can be remote controlled)
Pump on/off (can be remote controlled)
Flow rate
Displays Pump pressure
Slip ring supply pressure
Flow rate (digital with analog output)
Alarms Low flow
Low tank
AC power failure

The cart is also fitted with multiple gages to monitor pressures (pump and supply pressure), as well as flow rate with a digital readout. These systems also include electronics to alert the operator when the system is in a situation where the cooling cart falls below certain parameters (low flow, low tank, and AC power failure). The cooling cart can be controlled remotely, so the operator can monitor the vitals and even manage the cart from a control room. In the case of on-site power loss, the battery backup will provide an additional 30 minutes of continuous running to protect the slip ring from heat damage by drawing from the built in five-gallon tank. Custom features are also available and offer coolant preheating, refrigeration, and network control and monitoring.

Overhaul and Rentals

We can repair and overhaul many older slip ring designs. We have experience with virtually all high speed slip rings used in the past 40 years and can provide overhaul and rebuild support for these units. Additionally, we also have a rental fleet of slip rings available to the customer. The rental cost is based on the duration of lease period and number of hours run on the slip ring.

Download our Slip Rings Brochure