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  • Meridian Laboratory ROTOCON ERG
  • 800 A Rotary Ground
  • Roto Ground

Maintenance free ELECTRICAL ROTARY GROUND

ROTOCON® ERG-800

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ROTOCON® ERG-800 Model Specifications

» Perfectly consistent and stable current delivery, without fluctuations » 100% Maintenance-Free without greasing, cleaning, or adjustment required
» Frequently surpass 500 Million plus revolutions with guaranteed current consistency over time» RoHS / CE Compliant options available

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. The flexible new design offers a number of robust options and mounting variations to meet your exact specifications.

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 304SS corrosion proof housings to ensure a long service life, even in the most challenging manufacturing environments and chemical exposure.

ERG-800s are also available in RoHS / CE Compliant versions.

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

Part #ERG-800-01ERG-800-11ERG-800-21ERG-800-22
Length4.47"5.56"4.74"3.97"
Shaft Side

3/4"-10 Hole

3/4"-10 Stud

3/4"-10 Stud

Flange

Body Side

3/4"-10 Stud

3/4"-10 Stud

Flange

Flange

Hardware Included

2x LockWasher, 1x Hex Bolt, 1x Nut

2x LockWasher, 2x Nut

1x LockWasher, 1x Nut

None

RoHS ComplianceAdd -R to end of part number (ERG-800-xx-R)

Video: Installing Your ROTOCON ERG Series High Current Rotary Ground

YouTube video

RPM (Continuous)1,000
MOUNTING & TERMINATIONSModel dependent, click here for specifications sheet
MAXIMUM SIDELOAD WEIGHT CAPACITY25 Lbs. (11.3 Kgs)
HOUSING304 Stainless Steel
OPERATIONCan be operated in any direction or orientation
MAINTENANCENone - features permanently lubricated bearings, brush-free design requires no user maintenance of any type
DIMENSIONSModel dependent, click here for specifications sheet
LONGEVITYAll models are warranted one full year; most models tested up to 500 million total revolutions* (with proper installation and used within operating parameters)
DC CURRENT800A
AC CURRENT700A, f = 60Hz
600A, f = 120Hz
MAX FREQUENCY0 TO 250 MHz* (Contact Meridian Laboratory for max current rating)
MAX CONTINUOUS RPM1000
OPERATING TEMPStandard Versions: -20°C TO 70°C
RoHS / CE Versions: 10°C TO 70°C
HOUSING MATERIAL304 Stainless Steel
CONTACT RESISTANCE<1mΩ
DYNAMIC RESISTANCE<1mΩ (0 TO 750 RPM)
AMBIENT TEMPERATURENot to exceed 160˚F (70˚C)
IP RATINGStandard is IP65, Available up to IP68
RoHS COMPLIANCEOptional, RoHS /CE Compliancy Available

Advantages

  • 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
  • Five different versions allow for multitude of mounting options
Meridian Lab Rotary Ground

Applications

  • Rotary welding
  • Electro-plating
  • Plasma cutting
  • Rotary magnetrons/sputtering deposition
  • Cable reels
  • Lightning strike ground (up to 100,000A tested)
  • Electro-polishing
400A Rotary Ground Clamp
Meridian Lab Rotary Ground
400A Rotary Ground Clamp

Video: ROTOCON ERG – Electrical Rotary Ground Contact Resistance Demonstration

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

Through-Bore Models (ERGT Series)

MCT Series

Model #
(Specify preferred hole diameter as XXXX)
Minimum Hole DiameterMaximum Hole DiameterMax Current (Amps)Total Length (TL)Outside Diameter (OD)Number of Conductive Studs on BodyStud Size / ThreadRPM (Continuous / Momentary)
ERGT-500-XXXX 0.250"2.000"500A4.55"4.3"11/2"-13200 / 400
ERGT-1000-XXXX 0.250"2.000"1000A4.55"4.3"21/2"-13200 / 400
ERGT-1500-XXXX 0.250"2.000"1500A4.55"4.3"31/2"-13200 / 400
ERGT-2000-XXXX 0.250"2.000"2000A4.55"4.3"41/2"-13200 / 400
ERGT-2000-XXXX 1.000"2.500"2000A5.187"6"41/2"-13150 / 300
ERGT-3000-XXXX 1.000"1.000"3000A5.187"6"61/2"-13150 / 300
NoteThrough-Hole diameter can be specified at time of order to exact dimension; standard tolerance of bore is +0.003" / -0.000"Assumes 100% duty cycle of direct current (DC); alternating current (AC) will have lesser ampacity ratingAll conductive studs must be used to guarantee rated amperage maximumHigher RPMs acceptable if for momentary time, or if max temperature rating not exceeded
Need a different size or arrangement? Custom models are available, contact Meridian Laboratory for other models, and specific information.

Click here for installation and best practices page.

YouTube video