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  • ROTOCON ERG-3000-R RoHS Compliant High Amperage Rotary Ground
  • ROTOCON ERG-3000-R RoHS Compliant Rotary Ground



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ROTOCON® ERG-3000 Model Specifications

»  Provides consistent low and stable resistance for high current applications»  Robust industrial design provides reliable long lasting performance
»  Requires ZERO grease or routine maintenance»  Remains unaffected by RPM or total number of revolutions

The high-current ERG Series by Meridian Laboratory provides the perfect ground for rotational welding, plating, polishing, and other high-current applications that require rotation. Designed to withstand 100% duty cycles in continuous manufacturing and production processes, without interruption or downtime.

Contrary to conventional brushed rotary grounds, Meridian Laboratory’s ERG Series are arc-free, do not have internal friction, and do not require greasing or any type of maintenance. All ROTOCON rotary grounds are built environmentally sealed, and with 304 Stainless Steel corrosion resistent housings to ensure a long service life, even in the most challenging manufacturing environments and chemical exposure.

For applications requiring a through-bore, the ROTOCON ERGT Series electrical rotary grounds are listed in the chart below.

RPMModel dependent, see model specifications below*
MOUNTINGEnd of shaft with threaded stud or flange, or with set screws onto shaft (through-hole ERGT Series) Click here for installation and best practices video.
HOUSING304 Stainless Steel
OPERATIONCan be operated in any direction or orientation
MAINTENANCEFeatures permanently lubricated bearings, brush-free design requires no user maintenance

ERG-3000 Model Specifications

AMPERAGEModel dependent, see specifications chart - 100% overload allowed for <60 seconds
FREQUENCYDC to 1GHz - Contact Meridian Laboratory for ampacity ratings at higher frequencies
ROTATING CONTACT RESISTANCESame as stationary contact resistance (<0.1mΩ)
OPERATIONIntrinsically immune to internal arcing

ERG-3000 Model Specifications

Video: Installing Your ROTOCON ERG Series High Current Rotary Ground

YouTube video

This video shows installation and best practices when installing your ROTOCON ERG Series, high current rotary ground. Meridian Laboratory’s full lineup of single contact, high current rotary grounds provide a consistent, maintenance-free contact unaffected by RPM or total number of revolutions. Contrary to conventional brushed rotary grounds, Meridian Laboratory’s ERG Series are arc-free, do not have internal friction, and do not require greasing or any type of maintenance.


  • Extremely low contact resistance (<1mΩ (0 TO 1,000 RPM))
  • Maintenance free – does not require grease or adjustment of any type
  • Unaffected by RPM and use over time
  • Environmentally sealed
  • Operates in any direction or orientation


  • Rotary welding
  • Electro-plating
  • Plasma cutting
  • Rotary magnetrons/sputtering deposition
  • Cable reels
  • Lightning strike ground (up to 100,000A tested)
  • Electro-polishing

Video: ROTOCON ERG – Electrical Rotary Ground Contact Resistance Demonstration

Contact Meridian Laboratory – High-Performance Rotary Electrical Connectors with Zero-Noise, Maintenance-Free Operation in Industrial Environments