1.0C.I. TAKIRON Corporation. Micro motor product site.https://cik-ele.com/en/西山https://cik-ele.com/en/author/nishiyama/THE ROLE AND SELECTION OF CARBON BRUSHES FOR MOTORS｜EXPLAINING LIFESPAN AND REPLACEMENT TIMING｜C.I. TAKIRON Corporation. Micro motor product site.rich600338<blockquote class="wp-embedded-content" data-secret="MlHrsIT7NN"><a href="https://cik-ele.com/en/column/carbon-brush/">THE ROLE AND SELECTION OF CARBON BRUSHES FOR MOTORS | EXPLAINING LIFESPAN AND REPLACEMENT TIMING</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://cik-ele.com/en/column/carbon-brush/embed/#?secret=MlHrsIT7NN" width="600" height="338" title="“THE ROLE AND SELECTION OF CARBON BRUSHES FOR MOTORS | EXPLAINING LIFESPAN AND REPLACEMENT TIMING” — C.I. TAKIRON Corporation. Micro motor product site." data-secret="MlHrsIT7NN" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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https://cik-ele.com/wp-content/uploads/2026/06/542ddc75347f57e47a39778641a88bac-1.jpg19201280Motor carbon brushes are components that transmit electric current through sliding contact with the commutator (or slip ring); in DC motors, they work in conjunction with the commutator to maintain rotation. They are used in a wide range of equipment, from industrial motors to power tools. If carbon brushes wear out or commutation becomes unstable, it can lead to sparking or damage to the commutator, making them critical from the perspective of maintenance and downtime risks. Carbon brush materials include electrographite, natural graphite, and metal graphite, among others, and selecting the appropriate material based on the application and operating conditions is essential. Understanding how to assess lifespan and replacement timing based on brush wear, as well as how to diagnose motor malfunctions caused by commutation sparks, enables the early detection of warning signs, helping to reduce the risk of unexpected shutdowns and support preventive maintenance. This article explains everything from the basic structure and role of carbon brushes to methods for determining their lifespan and selection criteria based on application*. *This article covers general information about motors and is not intended to explain the features of our company’s motors.