Advantages of Silver Graphite Brushes:

  • High conductivity paired with low resistivity
  • Accurate signal, /power, and data transfer
  • Superior thermal performance
  • Oxidation & chemical resistance
  • Low wear rate, increasing contact life
  • Low coefficient of friction
  • Non-welding properties
  • Protect motor bearings from pitting, fluting, and premature failure

The Helwig Carbon Advantage:

  • Made in the USA (Milwaukee, WI)
  • Precision fabrication in a dedicated production area
  • Unmatched technical expertise
  • Superior customer service
  • Fast production and quick delivery
  • ISO 9001 Certified
Silver powder contents up to 97% by weight are available
Silver impregnation is available
Made In USA icon and flag
SG-2, silver graphite brushes by Helwig Carbon
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Spring Loaded Silver Graphite Brushes

  • Ideal for electrical connections demanding steady and efficient contact.
  • Common applications include airport security systems and CT scanners.
One of our silver graphite contacts
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Slip-Ring Silver Graphite Brushes & Contacts

  • Ideal for rotating electrical systems requiring uninterrupted contact, efficient transmission, and reduced friction.
  • Common applications include gun turrets and remotely operated vehicles.
wind power brush, silver graphite brush

High-Altitude Silver Graphite Brushes

  • Ideal for wind and aerospace industries needing dependable performance in various altitudes and extreme environments.
  • Common applications include aerospace equipment and wind grounding for turbines.
silver (for a silver graphite brush) next to a ruler
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Non-Welding Contact Tips

  • Particularly useful for sensitive electronic components and minimizing the risk of heat-related damage.
  • Common applications include wind generators and protection for pitch motor bearings.

Understanding the Synergy Between Silver and Graphite

The pure silver material provides high conductivity and low resistance while the graphite material provides self-lubricating properties in the brushes. We are able to apply additives to the graphite material which improves the self-lubricating properties to better suit the dry atmospheres in high altitude applications. Our silver graphite brushes & contacts will not melt nor weld to connecting metal surfaces as the graphite material cannot be melted. Compatible with the following contact surfaces: brass, bronze & steel.

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Typical order turnaround is 3 weeks

an icon for our capabilities, silver graphite brushe

Ability to produce upwards of 30,000 sliding contacts in 1 order

TON icon, silver graphite brush capability

Pressing Capabilities from 6 tons to 250 tons of pressure

6 furnaces icon, electrographite and silver graphite contacts

6 Furnace Systems to sinter materials for strength

caliper icon, silver-impregnated carbon graphite brushes

Tolerance Capabilities

– Press to size = .006
– Plate Material = .02

blending icon, electrographite and silver graphite contacts

Power Blending Room to evenly and accurately mix grade materials

  • Airport Security 

  • Robotics

  • Maritime Cathodic Protection

  • Defense

  • Radar Systems

  • Medical Scanning and Imaging Equipment  

  • Aerospace 

  • Wind Application

Silver Graphite Technology & Bearing Protection

Our proprietary silver graphite brushes will effectively divert induced shaft currents to ground, protecting the motor bearings from pitting, fluting, vibration and premature bearing failure.

A span of 6 bpk brushes on our silver graphite brushes page, example of shaft grounding solutions from Helwig Carbon, Bearing Protector Comparison: Carbon Fiber Rings vs. BPKs blog post, BPK Spread 3D Renders
graphic of K007: Exclusive Silver Graphite Brush Grade blog post

K007: Exclusive Silver Graphite Brush Grade

Helwig Carbon provides the shaft grounding industry the lowest resistant path to ground via a proprietary silver graphite brush grade to protect from damaging VFD-induced shaft currents.  This one-of-a-kind brush grade is 5X lower in resistance than

Electrical Sliding Contacts & Molding Technology for the Future blog

Molding Technology for the Future

Helwig Carbon continues to excel in its ability to provide press-to-size parts to the electrical sliding contacts industry.  In recent years we have expanded our operations to provide additional capacity to meet this area of growth.  Thorough quality assurance steps have led to a significant reduction in lead time and eliminated unnecessary secondary machining operations that many of our competitors’ experience in their operations.

wind turbines, used for blog post on silver graphite grades

New Silver Graphite Grade Excels in Grounding Applications

The function of a carbon brush on power ring vs. a grounding ring is significantly different! Many customers use copper graphite for power rings and use similar copper graphite grades for grounding rings. This typically results in grooving of the ground rings. The function of the carbon brush on power and ground slip ring is significantly different. This is where Helwig’s silver graphite grade K297 excels. This grade was specifically designed for grounding applications and is becoming popular in the wind turbine market.


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