Application
Motors & Generators
DC motors, AC generators, traction drives, wind turbines, and power tool commutators — from fractional HP to industrial scale.
Industrial-grade carbon and graphite blanks for downstream machining, component manufacturing, and OEM supply programs.
We produce electrographite and carbon-grade blanks for manufacturers of motor brushes, generator contacts, grounding brushes, and sliding current collectors. Each grade is formulated to balance conductivity, wear rate, and contact drop for your specific motor type and operating speed.
DC motors, AC generators, traction drives, wind turbines, and power tool commutators — from fractional HP to industrial scale.
Every production run is tested for bulk density, specific resistance, and Shore hardness to ensure repeatable brush performance.
Multiple carbon and electrographite grades covering a broad resistivity range — copper impregnation available for high-current applications.
The following reference ranges summarize electrical resistivity and Rockwell hardness for our standard carbon brush blank grades.
| Grade | Electrical Resistivity (µΩ·m) | Rockwell Hardness |
|---|---|---|
| D104 | 6-14 | 71-110 |
| D172 | 8-18 | 71-112 |
| D214 | 21-35 | 55-103 |
| D252 | 10-20 | 50-98 |
| D308 | 28-52 | 47-108 |
| D374 | 32-59 | 45-105 |
| S-3 | 9-17 | 30-94 |
Send us your motor type, operating conditions, and current brush issues — our engineers will recommend a suitable grade and provide samples for evaluation before committing to a bulk order.