High-speed slip rings
Alpha Slip Rings High Speed slip ring
Compact 1.73 in anodised aluminium slip ring with up to 10 passes plus one fibre channel, 600 V and 5 A, rated to 3,000 rpm (formerly model 331).
Key specifications
| Circuits (max) | 10 |
|---|---|
| Current per circuit (max) | 5 A |
| Voltage (max) | 600 V |
| Speed (max) | 3,000 rpm |
| Outer diameter (max) | 43.9 mm |
| Ingress protection | IP50 |
| Fibre channels (max) | 1 |
Summarised in our own words from United Equipment Accessories, Inc.'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Diameter converted from inches.
Specify Motion is not affiliated with United Equipment Accessories, Inc.. Alpha Slip Rings and High Speed 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 an Alpha Slip Rings 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.
Slip rings built for 800 to 15,000 rpm, mainly used on test rigs and non-destructive testing equipment.
| Published maximum | High Speed slip ring | High Speed Slip Ring |
|---|---|---|
| Circuits | 10 | — |
| Current per circuit | 5 A | — |
| Speed | 3,000 rpm | 15,000 rpm meets or exceeds |
| Voltage | 600 V | — |
| Fibre channels | 1 | — |
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 high-speed slip ring is
A high-speed slip ring is a rotary joint built to run at speeds well above general industrial units, typically from a few thousand to over ten thousand rpm. To manage heat and wear, designers keep ring diameters small, use precisely balanced rotors and high-precision bearings, and select brush materials and contact forces for the higher surface speed. Some designs use liquid or forced-air cooling. Most high-speed units carry low-level signals such as strain gauges and thermocouples, with limited power circuits.
When engineers choose a high-speed slip ring
Choose a high-speed design for test rigs, spindles, centrifuges, turbines and tyre or wheel testing where the rotating sensors spin far faster than a normal slip ring allows. The trade-offs are circuit count, current and life: speed limits how big the rings can be, and brush wear rises with surface speed, so service intervals may be shorter. For very high data rates at speed, telemetry or contactless transfer may be an alternative. Balance and runout of the mounting shaft are critical.
How to specify the Alpha Slip Rings High Speed slip ring
Send these with your enquiry and an engineer can confirm the right High Speed slip ring variant or an equivalent:
- Maximum and continuous speed (rpm)
- Duty: continuous running or short test runs
- Number and type of signal circuits, such as strain gauge, thermocouple or encoder
- Acceptable electrical noise (mΩ or µV)
- Power circuits and current (A)
- Shaft or bore interface and permissible runout (mm)
- Cooling, lubrication and expected service interval (h)
Common mistakes to avoid
- Mounting on a shaft with runout that the slip ring bearings cannot tolerate at speed
- Quoting peak test speed but not how long the rig runs there
- Using standard thermocouple wire through the rings and creating junction errors
- Forgetting the slip ring's own drag torque and inertia in rig calculations
Alpha Slip Rings High Speed slip ring: frequently asked questions
What is the Alpha Slip Rings High Speed slip ring?
Compact 1.73 in anodised aluminium slip ring with up to 10 passes plus one fibre channel, 600 V and 5 A, rated to 3,000 rpm (formerly model 331). Published series figures include circuits 10, current per circuit 5 A, voltage 600 V, speed 3,000 rpm. It is made by United Equipment Accessories, Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the Alpha Slip Rings High Speed slip ring?
The Alpha Slip Rings High Speed slip ring is made by Alpha Slip Rings (United Equipment Accessories, Inc.) and is listed here for engineers comparing options. Specify Motion is not affiliated with United Equipment Accessories, Inc.; brand names are used only to identify the product.
What is the circuits of the Alpha Slip Rings High Speed slip ring?
The published series maximum circuits is 10. Individual models and sizes in the High Speed 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 Alpha Slip Rings High Speed slip ring?
Yes. On published figures, High Speed Slip Ring is the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
How fast can a slip ring rotate?
General industrial slip rings are typically rated to a few hundred rpm, while dedicated high-speed designs commonly reach several thousand to over ten thousand rpm. The practical limit depends on ring diameter, because surface speed sets brush wear and heat. Small-diameter capsules reach the highest speeds, while large-bore units are rated lower. Always check both maximum speed and continuous rating.
Can strain gauge signals pass through a slip ring cleanly?
Yes, when the rings use low-noise precious-metal contacts and the circuits are allocated well. Use dedicated rings for each bridge connection, keep them away from power, and consider amplifying or digitising on the rotor where noise is critical. Contact resistance variation is the main noise source, so state the acceptable level and the expected speed.
Further reading: How to select a slip ring · How to specify a slip ring · Slip rings
Other high-speed slip rings series
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