4PCS N398321 Carbon Brushes Replacement Compatible for Dewalt Black & Decker/DWP849/DWP849X Polisher - YOKUSO, YK-43

• ✅【High Melting Point】 The carbon metal having high melting point, the carbon brush having nearly 3550 degree C melting temperature . we all are know the brushes in dc motor connected to nearly to the commutator. so whenever motor running it will produced the spark and friction between commutator and brushes. if temperature is increase then copper brush can not with stable that’s why we are using carbon brushes. ✅【self lubricating】The carbon brush is having self lubricating. so its not required any other Greece or lubricating oil for cooling purpose. so when ever the motor gets off then carbon brushes are automatically get cool down. ✅【Negative temperature co-efficient】 The carbon brush having negative temperature co-efficient. it means whenever the temperature increases then resistance automatically reduced. we know motor running time friction and heat produced and it will increase the temperature of the motor. so carbon brush reduced resistance due to increasing temperature and current flow will increases. ✅【Soft metal】 The carbon brush is generally very soft metal. so whenever the motor running the friction produced between commutator and brush. as per the softness of carbon brush will not damage the commutator. ✅【CUSTOMER SUPPORT】YOKUSO team 7*24 online support standing by, Any inquiries please contact Us freely. Our customer service team care about providing customer's nice shopping experience.