Mercury Slip Ring
A2H
Mercury Type

Asian Tool Slip Ring

Uses a liquid mercury contact interface for continuous rotation, delivering ultra-low electrical noise and near-zero contact resistance with no maintenance required.

Features

  • Very low electric noise
  • Very low cost
  • Very low contact resistance (less than 1 milliohm)
  • No maintenance and better reliability than traditional slip rings
  • Suitable for signal and power transfer of rotating devices or instruments

Need Customization?

We offer customized solutions for specific requirements.

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Mercury Slip Ring — Model Selection

4 models
ModelConductor PolesCurrent (Amp)Voltage AC (V)Max. Freq. (MHz)Max. RPMOperating Temp. Max/Min (°C)Rotating Torque (gm-cm)Insulation Resistance
A2S24250200200060 / -3075>25 MΩ
A2H230250200180060 / -30200>25 MΩ
A4H430/4250200120060 / -30400>25 MΩ
A6H630/425010030060 / -30700>25 MΩ

Technical Specifications

rotational speed
Up to 2000 RPM
operating temperature
-30°C to 60°C
insulation resistance
> 25 MΩ
contact resistance
Less than 1 mΩ

About Electrical Rotary Joints (Slip Rings)

Powering Continuous Rotation. Essential electromechanical devices that enable continuous, unrestricted rotation while maintaining secure and stable electrical connections.

A slip ring is an electrical connector designed to conduct current or data across a rotating interface, replacing the need for dangling wires that would inevitably twist and break.

Key components

Rings
Circular, conductive tracks (usually made of copper or a precious metal alloy) mounted on the rotor (the rotating part)
Brushes
Stationary, conductive contacts (often graphite, carbon fiber, or a precious metal alloy) that rest on the rings and transfer the electrical current or signal
Housing/Stator
The fixed enclosure that holds the brushes and provides the mounting points for the stationary side

Typical applications

  • Packaging Machinery: Transmitting power and control signals to rotating sealing heads or label applicators
  • Cranes & Winches: Providing power and control signals to the rotating drum or trolley
  • Robotics & Automation: Enabling unlimited joint movement in multi-axis robots without damaging wiring
  • Turrets & Indexing Tables: Supplying power and control for precision positioning systems
  • Wind Turbines: Transmitting pitch-control signals and monitoring data from the rotating hub to the nacelle
  • Medical Equipment (e.g., CT Scanners): Handling high-speed data transfer and power delivery during continuous rotation