OVERVIEW ADVANTAGES SPECIFICATIONS CONFIGURATIONS MOUNTING FAQ CUSTOM CAPABILITIES APPLICATIONS RELATED PRODUCTS RESOURCES

ROTOCON ERG-400

400 AMP ROTARY GROUNDS

ROTOCON ERG with Flange ROTOCON Part Up Close

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TECHNICAL FEATURES

400 AMP ROTARY GROUND SERIES

Rated for continuous 400 amps DC at 100% duty cycle
Consistent and stable current delivery without fluctuation
Maintenance-free without routine grease, cleaning, or brush replacement
Sensitive environment, non-mercury (RoHS) versions available
Brushless design eliminates wear and ensures longevity

ROTOCON ERG-400 400 amp rotary grounds are rated for continuous 400A DC operation, providing a stable and consistent current in rotating applications without fluctuation, regardless of position, speed, orientation, or total revolutions. As a superior alternative to traditional metal-on-metal rotary grounds, such as the Tweco (ESAB) RG-140 (9250-1114), Sumner ST-107, and Lenco L02080, ROTOCON ERG-400 rotary grounds offers improved performance, durability, and reliability.

Commonly used in rotary welding, electroplating, electropolishing, cutting, and other high-current industrial applications, ROTOCON ERG-400 rotary grounds feature four different mounting configurations for easy integration. Unlike conventional brushed and metal-on-metal contacts, ROTOCON rotary grounds are brushless and maintenance-free, eliminating the need for brush contact adjustments or routine grease application. Built for industrial environments, they are constructed from high-durability materials to ensure long-lasting, trouble-free operation in demanding applications.

Advantages

Why Choose ROTOCON 400 Amp Rotary Grounds?

CONSISTENT CURRENT MAINTENANCE FREE DURABLE CONSTRUCTION ROHS FLEXIBLE DESIGNS

CONSISTENT CURRENT PROVIDES BETTER RESULTS

ROTOCON brushless 400 amp rotary grounds provide a low-resistance connection between stationary and rotating elements of an application. Their superior design ensures current delivery does not fluctuate over time or under rotation, something which metal-on-metal contacts cannot achieve. This ensures better process consistency during high current applications.

NO METAL-ON-METAL CONTACT
< 0.03 MILLIOHM RESISTANCE, STATIONARY OR ROTATING
DEPENDABLE CURRENT DELIVERY WHILE STATIONARY, INDEXING, AND ROTATING
REDUCED DEFECT RATE FROM STABLE CURRENT WITHOUT FLUCTUATION
110 GRADE COPPER ENSURES OPTIMAL ELECTRICAL CONTACT FOR MAXIMUM PERFORMANCE

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MAINTENANCE FREE ROTARY GROUNDS

ROTOCON brushless 400 amp rotary grounds do not require maintenance of any kind. They deliver unparalleled longevity and reliability, regardless of orientation or duty cycle. They provide a fast return on investment from the savings gained from reduced process downtime and replacement of conventional rotary grounds.

DO NOT REQUIRE GREASE, ADJUSTMENT, CLEANING, OR BRUSH REPLACEMENT
FREQUENTLY SURPASS 500 MILLION TOTAL REVOLUTIONS
MAXIMIZES ROI FROM REDUCED DOWNTIME, SCRAP, AND REPLACEMENT ROTARY GROUND SAVINGS

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400A Rotary Grounds Designed for Manufacturing and Harsh Environments

ROTOCON brushless 400 amp rotary grounds are designed to be used in heavy duty manufacturing applications. They are made from durable materials that withstand the welding, plating, and cutting environments they are used within. ROTOCON high current rotary grounds are the ideal choice for semi or fully automated processes that demand long term consistency and reliability.

Made from corrosion-resistant 304 stainless steel and high-conductivity 110 copper
Fully sealed to protect against dust and liquid intrusion*
DESIGNED TO SUPPORT CABLE AND CONDUCTOR LOADS**

*FOR EXACT INGRESS PROTECTION RATINGS, SEE PRODUCT SPECIFIC PAGES

**FOR EXACT CONDUCTOR LOAD RATINGS, SEE PRODUCT SPECIFIC PAGES

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NON-MERCURY ROTARY GROUNDS FOR SENSITIVE APPLICATIONS

Meridian Laboratory offers non-mercury, brushless 400 amp rotary ground connectors catered to sensitive applications. They provide the same stable and consistent current delivery, without the need for maintenance or adjustments. ROTOCON non-mercury rotary grounds regularly surpass hundreds of millions of total revolutions.

Non-mercury liquid contact models available for sensitive applications
Consistent, repeatable performance, matching mercury-based rotary grounds
Maintenance-free operation for long-lasting reliability

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400A Rotary Grounds for Any Application

ROTOCON 400 amp brushless rotary grounds offer a wide range of mounting and termination options to best fit your application’s needs. In addition, Meridian Laboratory can provide custom solutions to seamlessly integrate to your workpiece with ease. When properly installed, all ROTOCON rotary grounds offer low and stable resistance, providing steady current delivery without maintenance.

Multiple standard mounting options
Customizable solutions by Meridian Laboratory available

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General Specifications

ERG-400 Rotary Ground Specifications

AMPERAGE

p

400

AMPS CONTINUOUS DC

CONTACT RESISTANCE

p

<0.03mΩ

DUTY CYCLE

p

100%

CONTINUOUS

Configurations

ERG-400 Standard Models

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Name	Mounting	Amperage	Total Length	ROHS	RPM	2D Download Action Type	File Datasheet	Model Download (3D STP)	Photos
ERG-400-01	End of Shaft	400A	3.5"	No	1750	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-01.pdf	Yes	ERG-400-01.jpg
ERG-400-01-R	End of Shaft	400A	3.5"	Yes	1750	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-01-R.pdf	Yes	ERG-400-01-R.jpg
ERG-400-11	End of Shaft	400A	4.4"	No	1750	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-11.pdf	Yes	ERG-400-11.jpg
ERG-400-11-R	End of Shaft	400A	4.4"	Yes	1750	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-11-R.pdf	Yes	ERG-400-11-R.jpg
ERG-400-21	Flange	400A	3.8"	No	1750	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-21.pdf	Yes	ERG-400-21.jpg
ERG-400-21-R	Flange	400A	3.8"	Yes	1750	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-21-R.pdf	Yes	ERG-400-11.jpg
ERG-400-41	Clamp	400A	7.0"	No	50	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-41.pdf	Yes	ERG-400-41.jpg
ERG-400-41-R	Clamp	400A	7.0"	Yes	50	Standard Model	MERIDIAN-LABORATORY-ROTOCON-ERG-400-41-R.pdf	Yes	ERG-400-21.jpg

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MOUNTING

400 Amp Rotary Ground Mounting Options

ERG-400-01

ERG-400-11

ERG-400-21

ERG-400-41

FAQs

Common Rotary Ground Questions

What size mount do I need?

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Is this RoHS/CE compliant?

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What speed does this reach?

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How do I mount this item?

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Customization

ERG-400 Rotary Ground Customization Options

ELECTRICAL MOUNTING ENVIRONMENTAL ACCESSORIES ROHS

Medium to High Frequency
Ultra-High Current (Momentary)
Medium to High Voltage

For higher frequency, voltage, or current applications, Meridian Laboratory has custom brushless rotary ground options to meet your needs and deliver long-lasting and maintenance-free performance.

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Custom Mounting Flanges & Thread Types
Integrated Drive Gear Mechanisms

Meridian Laboratory works with customers to integrate and deliver custom rotary grounds complete for new or existing equipment designs. This ensures seamless integration and efficiency from prototype to production volumes.

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Ultra Corrosive Environments
RoHS Sensitive Applications
Protective / Non-Conductive Covers & Guards

For sensitive or harsh environments, Meridian Laboratory offers additional customization options to provide durable rotary grounds that provide maximum longevity and performance.

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Rotating Media / Fluid Unions
Magnetic Ground Clamps
Grounding Contact Wheels for Linear Applications

Meridian Laboratory can integrate unique accessories into ROTOCON brushless rotary grounds to provide the maximum value.

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For applications and industries which require RoHS compliant materials, Meridian Laboratory offers brushless rotary grounds which meet the requirements of the RoHS initiatives. For more information, please click here.

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APPLICATIONS & USES

Common Uses for ERG-400 Rotary Grounds

Rotary Welding & Cutting

Tanks, pipes and other welding applications require a rotary ground to transfer current while the materials are rotated and welded, enabling the production of stacked tubes and other welded end products. Welding tables, welding positioners and robotic welding all require the ability to transfer a consistent current while the work piece or welder is rotated or manipulated.

Rotational Plating & Polishing

As parts are immersed in an electroplating or polishing bath, they are often rotated to ensure even coverage across all surfaces, resulting in a higher-quality finish. Rotary grounds are necessary to provide a steady, consistent electrical current to the workpiece or fixturing as they rotate.

Rotary Sputtering & Deposition

Rotating electrical grounds can be used in sputtering applications to provide a ground circuit to a rotating workpiece, ensuring an even application of deposited materials onto the substrate. Having a stable ground resistance allows the parameters to be more tightly controlled and monitored, providing a better end product.

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