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Markets & products

Carbon Brushes

Markets & products

Carbon Brushes

Carbon Brushes

Carbon brushes are the essential sliding contact in electrical machines, responsible for transferring current between stationary and rotating components. Our range of high-performance brushes is engineered to withstand extreme mechanical stress, high current densities, and varying atmospheric conditions.

By focusing on superior material composition, we provide solutions that optimize motor performance, reduce downtime, and protect your commutators and slip rings from premature wear.

Selecting the correct carbon grade is critical to the efficiency of your machinery. We offer a comprehensive selection of materials designed for every industrial environment:

 

Material Grade Ideal Applications Key Technical Benefit
Electrographite Steel mills, paper plants, high-speed DC motors. High thermal stability and excellent commutation.
Metal-Graphite Low-voltage motors, grounding, lightning protection. High metal content (Copper/Silver) for superior conductivity.
Resin-Bonded Power tools, appliances, and FHP motors. High electrical resistance and vibration damping.
Carbon-Graphite Older machinery and slow-speed applications. Robust cleaning action for oxidized commutators.

 

 


Specific Use Cases & Applications

Our products are utilized across a wide spectrum of industrial sectors, ensuring reliability where it matters most:

  • Manufacturing & Automation: High-precision brushes for CNC machinery and automated production lines.
  • Energy & Wind Power: Grounding brushes and current transmission for wind turbine pitch motors and slip ring assemblies.
  • Heavy Industry: Durable solutions for mining excavators, cement kilns, and crane motors.
  • Transport & E-Mobility: Specialized components for railway traction motors, tramways, and trolleys.
  • Pumping & Vacuum Systems: Durable carbon components for industrial pumps and rotating equipment.

 

Ready to discuss your tungsten heavy alloy project?

Send us your drawings or specifications. Our engineering team will review your project and get back to you with a tailored proposal, typically within 48 hours.

Request a quote

By email: tomas.bocco@casram.com

Or call us directly: +41 91 611 21 10

Why Choose Our Solutions?

  • Decades of Experience: We leverage extensive technical knowledge in graphite and carbon derivatives to provide the right solution for every application.
  • Bespoke Manufacturing: Every brush can be customized with specific shunts (copper litz wires), terminals, and dimensions to fit any motor or brush holder, including legacy and obsolete models.
  • Optimized Commutation: Our materials are selected to minimize sparking and heat generation, directly extending the life of your motor’s internal components.
  • Immediate Availability: We maintain a stocked warehouse and production capability to handle urgent replacement needs and minimize industrial downtime.

Frequently Asked Questions (FAQ)

Q: When should I replace my carbon brushes? A: Brushes should be inspected regularly and replaced when they reach approximately 50% of their original length. Using worn-out brushes can lead to spring damage and costly commutator sparking.

Q: What causes "dusting" or rapid wear? A: Rapid wear is often caused by incorrect spring pressure, low humidity, or an mismatched material grade for the specific electrical load of the motor.

Q: Can you provide brushes for custom or rare motors? A: Yes. We specialize in providing custom-tailored carbon brushes. We can work from technical drawings or physical samples to reproduce brushes for any type of electric machine.

 


 

Ensure Your Machinery Operates at Peak Efficiency. Our technical team is available to assist you in selecting the ideal carbon grade for your specific application.

Contact us!

Email: info@casram.com
Phone / Whatsapp: +41 76 624 27 64