• New brushes can fix a poorly running motor
• Replacement brushes can restore a motor's electric braking
• Worn brushes are a common cause of an intermittent motor

Carbon motor brushes are one of the most commonly replaced power tool parts. Carbon brushes will eventually require replacement because they are wear items, meaning through use and friction they will slowly be eroded away. An worn brush is often the cause of poor motor power, irregular motor function, and reduced electric braking. A worn out brush will generally be worn down near the wire lead and may be pitted, burned, or cracked. Be sure to check your armature for damage, such as cracks or burns, while replacing your brushes as it can indicate larger motor problems.