Carbon Graphite Automotive Brushes

We are an industry leader in the carbon graphite aftermarket brush industry, as well as a supplier to major OEM manufacturers.


Our wear automotive brushes are made from the following materials:

We also offer various impregnations and treatments to further fit your application needs.

Wear Plates & Graphite Plugs

Data Sheet Download

Customized Solutions

Each of our brushes can be custom-designed to your specific requirements. We develop our own proprietary grades and manufacture each product in-house, so we will work closely with you to find the right brush grade or develop new grades to optimize the performance of your generator, alternator or starter.

We don’t simply machine a product to a different specification; we are able to alter the base materials and physical properties of our products to make them ideal for your needs.

Key Advantages of St. Marys Carbon Automotive Brushes:

Stability at High Temperatures

Our proprietary mix of carbon graphite is able to withstand extreme temperatures, which allows our brushes to be used in a variety of harsh environments while still maintaining performance and increasing your equipment’s uptime.

Low Friction / Wear

The self-lubricating properties of our brushes will greatly reduce the amount of friction and wear during operation, significantly reducing maintenance time, replacement and equipment damage.

High Thermal Conductivity

Our brush materials allow for heat exchange which will prevent overheating and most importantly will not cause damage to your equipment.


Our automotive brushes are self-lubricating, meaning that a separate lubricant (e.g., oil) is not required, which allows them to be used in both dry-running and sanitary environments.


As our brushes can withstand high temperatures, they are resistant to melting or welding to your equipment during operation, allowing your equipment to run longer and perform better.


Our proprietary mix of carbon graphite resists chemical degradation of the surface material, allowing our brushes to be used in harsh environments while maintaining performance.

Key End Products

Our brushes are used in the motors of a variety of end products as listed below. Remember that we custom-design our products to fit your needs, so please contact us if you have a need outside of those below and we’ll work with you to find a solution.

  • Automobiles
  • Trucks
  • Buses
  • Heavy Duty Vehicles & Equipment (e.g., Earth Movers, Cranes)
  • Vintage Vehicles
  • Motorcycles


Key Markets

Our brushes are used across a wide range of different markets, including:

  • Automotive
  • Construction
  • Mining
  • Power Generation
  • Transportation