Mini-through hole slip ring with inner hole 5mm is specially designed for Train ultrasonic monitoring device, and A rotating ultrasonic monitoring system is often used to scan all around the axle or wheel of train. The mini through-hole slip ring is installed inside the rotating fixture to transfer electrical signals and power between The rotating ultrasonic sensors and.
The stationary data processing unit.
Product Picture

Mechanical Parameters
|
Working speed |
350rpm |
|
Operating temperature |
-20℃~ +60℃ |
|
Contact material |
Gold to Gold |
|
Bearing |
Steel ball bearing |
|
Housing Material |
POM |
Electrical Parameters
|
Circuit |
4 |
|
Current |
Signal |
|
Voltage |
≤240V |
|
Dielectric strength |
≥100V@50Hz between each circuit |
|
Insulation resistance |
500MΩ@ 500VDC |
|
Electric noise |
≤7MΩ |
|
Lead wire size |
28AWG/30AWG, UL , color Teflon, Silver or Tin Plated |
|
Lead wire length |
300mm or as specified |
Why this slip ring Critical for Train Ultrasonic Monitoring?
|
Feature |
Importance |
|
Compact Design |
Fits inside tight sensor housings on inspection equipment |
|
Stable Signal Transmission |
Maintains accuracy of flaw detection data |
|
Low Electrical Noise |
Prevents interference in high-frequency ultrasonic signals |
|
Durable and Maintenance-Free |
Withstands millions of revolutions in field environments |
|
Through-hole Design |
Easy installation |
Mechanical Integration
• The central hole allows the slip ring to be installed around a rotating shaft or fixture.
• The rotor side connects to the rotating ultrasonic probe.
• The stator connects to the fixed electronics or signal processors.
Signal Transmission
• When the rotor rotates, internal gold brushes contact concentric rings that carry:
◦ Ultrasonic signal pulses (typically 1–10 MHz)
◦ Echo return signals
◦ Power supply (e.g. 12V/24V)
◦ Control or feedback signals (e.g. encoder, temperature)
• The slip ring ensures these signals are transmitted reliably while allowing 360° continuous rotation.
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