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SILVER GRAPHITE BRUSHES

We manufacture a variety of silver graphite brushes and contacts in a dedicated production area in our Milwaukee, WI headquarters. Our silver graphite brush grades are designed with pure precision to handle the most demanding requirements in critical applications.

Advantages of Silver Graphite Brushes:

High conductivity/Low resistivity
Accurate signal/power/data transfer
Good thermal performance
Oxidation & chemical resistance
Low wear rate, increasing contact life
Low coefficient of friction
Non-welding

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

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Silver Graphite Brush Products

Material Relationship

The pure silver material provides high conductivity and low resistance while the graphite material provides self-lubricating properties. 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.

Silver Graphite Brochure

SG-2, silver graphite brushes by Helwig Carbon

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Spring Loaded Brushes

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Slip-Ring Brushes & Contacts

High-Altitude Brushes

Wind Applications

Aerospace Applications

silver (for a silver graphite brush) next to a ruler

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Non-Welding Contact Tips

Manufacturing Capabilities

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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

Industries Served

Security Scanner that uses our graphite brush

Robotics utilize our graphite brush technology

CT Scanner, with out silver graphite brush

Wind application, silver-impregnated carbon graphite brushes

BEARING PROTECTION KITS™

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

Protect Your Motor Bearings

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

Silver Graphite Brush Blog Posts

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

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.